Sporadic failure of test Many_ConcurrentReaders #6508

ironage · 2023-04-17T11:31:14Z

We had a crash on CI:

1: /Users/realm/workspace/realm_realm-core_PR-6506/src/realm/alloc_slab.cpp:892: [realm-core-13.9.1] Assertion failed: m_mappings.size()
1: 0   realm-tests                         0x0000000110203dac _ZN5realm4utilL18terminate_internalERNSt3__118basic_stringstreamIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE + 28
1: 1   realm-tests                         0x0000000110203cb1 _ZN5realm4util9terminateEPKcS2_lOSt16initializer_listINS0_9PrintableEE + 385
1: 2   realm-tests                         0x000000011005cf82 _ZN5realm9SlabAlloc11attach_fileERKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEERNS0_6ConfigEPNS_4util13WriteObserverE + 2050
1: 3   realm-tests                         0x000000011009a689 _ZN5realm2DB4openERKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEEbRKNS_9DBOptionsE + 2297
1: 4   realm-tests                         0x00000001100a2606 _ZN5realm2DB6createERKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEEbRKNS_9DBOptionsE + 70
1: 5   realm-tests                         0x000000010fd55966 _ZN5realm4util6Thread11entry_pointIZN38Realm_UnitTest__Many_ConcurrentReaders8test_runEvE3$_3EEPvS5_ + 102
1: 6   libsystem_pthread.dylib             0x00007ff800fd84e1 _pthread_start + 125
1: 7   libsystem_pthread.dylib             0x00007ff800fd3f6b thread_start + 15!!! IMPORTANT: Please report this at https://github.com/realm/realm-core/issues/new/choose
1/3 Test #1: CoreTests ........................Subprocess aborted***Exception:  27.62 sec

I did a quick issue search to see if this has happened before related to #3418 or #1696

The text was updated successfully, but these errors were encountered:

finnschiermer · 2023-05-03T11:32:12Z

I can no longer access the failed run on CI. @ironage do you remember a) if this was with encryption and b) if it was on a MacOS ?

ironage · 2023-05-03T16:54:12Z

That is unfortunate that the CI run has been lost already.
I can infer from the stack copied here that this was a MacOS machine due to the presence of libsystem_pthread.dylib and from the source of the test, I see that the Realm is not configured for encryption (regardless of if it is compiled in or not, the test does not attempt to use crypt_key() in the config).

sync-by-unito · 2023-05-04T15:11:36Z

➤ finnschiermer commented:

This is weird. The test in question is using DB and SlabAlloc in a single threaded fashion which greatly simplifies things. But I have not yet found a way in which the assert can possibly fire.

sync-by-unito · 2023-05-30T10:18:02Z

➤ finnschiermer commented:

I cannot make progress on this without further info. Keeping the issue for a while for future reference.

ironage · 2023-06-16T22:02:41Z

Another occurrence on CheckiOSSimulatorDebug:

/Users/realm/workspace/realm_realm-core_PR-6703/test/test_shared.cpp:1403: [realm-core-13.15.0] Assertion failed: false
0   realm-tests                         0x0000000109cd021c _ZN5realm4utilL18terminate_internalERNSt3__118basic_stringstreamIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE + 28
1   realm-tests                         0x0000000109cd00d3 _ZN5realm4util19terminate_with_infoEPKcS2_lS2_OSt16initializer_listINS0_9PrintableEE + 387
2   realm-tests                         0x0000000109ccff41 _ZN5realm4util9terminateEPKcS2_lOSt16initializer_listINS0_9PrintableEE + 81
3   realm-tests                         0x0000000109479a40 _ZZN38Realm_UnitTest__Many_ConcurrentReaders8test_runEvENK3$_3clEv + 480
4   realm-tests                         0x0000000109479658 _ZN5realm4util6Thread11entry_pointIZN38Realm_UnitTest__Many_ConcurrentReaders8test_runEvE3$_3EEPvS5_ + 56
5   libsystem_pthread.dylib             0x00007ff834c3d4e1 _pthread_start + 125
6   libsystem_pthread.dylib             0x00007ff834c38f6b thread_start + 15
!!! IMPORTANT: Please report this at https://github.com/realm/realm-core/issues/new/chooseio.realm.CoreTests: 96430

ironage · 2023-07-11T20:33:19Z

Another instance on checkiOSSimulator_Debug:

/Users/realm/workspace/realm_realm-core_PR-6777/test/test_shared.cpp:1403: [realm-core-13.16.1] Assertion failed: false
0   realm-tests                         0x000000010fce3d3c _ZN5realm4utilL18terminate_internalERNSt3__118basic_stringstreamIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE + 28
1   realm-tests                         0x000000010fce3bf3 _ZN5realm4util19terminate_with_infoEPKcS2_lS2_OSt16initializer_listINS0_9PrintableEE + 387
2   realm-tests                         0x000000010fce3a61 _ZN5realm4util9terminateEPKcS2_lOSt16initializer_listINS0_9PrintableEE + 81
3   realm-tests                         0x000000010f48c5c0 _ZZN38Realm_UnitTest__Many_ConcurrentReaders8test_runEvENK3$_3clEv + 480
4   realm-tests                         0x000000010f48c1d8 _ZN5realm4util6Thread11entry_pointIZN38Realm_UnitTest__Many_ConcurrentReaders8test_runEvE3$_3EEPvS5_ + 56
5   libsystem_pthread.dylib             0x00007ff834c3d4e1 _pthread_start + 125
6   libsystem_pthread.dylib             0x00007ff834c38f6b thread_start + 15
!!! IMPORTANT: Please report this at https://github.com/realm/realm-core/issues/new/chooseio.realm.CoreTests: 4672

ironage · 2023-07-18T20:04:55Z

A failure happened during our iOS debug tests with the additional logging:

Exception during Many_ConcurrentReaders:
Reason: 'Failed to open Realm file at path '/Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm': header has invalid mnemonic. The file is either not a Realm file, is an encrypted Realm file but no encryption key was supplied, or is corrupted. top_ref[0]: E001800100101, top_ref[1]: 200000000, mnemonic: 2 0 0 0, fmt[0]: 0, fmt[1]: 0, flags: 0'
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
DB: 42341 Thread 0x700000a29000: Start read: 2
DB: 42341 Thread 0x700000a29000: End transaction
DB: 42341 Thread 0x700000a29000: DB closed
DB: 42341 Thread 0x700000a29000: Open file: /Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm
Thread[3]: /Users/realm/workspace/realm_realm-core_PR-6795/test/test_set.cpp:718: Begin Set_Difference
Thread[3]: /Users/realm/workspace/realm_realm-core_PR-6795/test/test_query2.cpp:4342: Begin Query_ArrayLeafRelocate
/Users/realm/workspace/realm_realm-core_PR-6795/test/test_shared.cpp:1416: [realm-core-13.17.0] Assertion failed: unexpected_exception with (e.what()) =  ["Failed to open Realm file at path '/Users/realm/Library/Developer/CoreSimulator/Devices/1E734FAD-B627-4EAE-87ED-9E1A566847A8/data/Containers/Data/Application/901A737A-6290-4D89-B027-26C431287365/Documents/Many_ConcurrentReaders.1.path.realm': header has invalid mnemonic. The file is either not a Realm file, is an encrypted Realm file but no encryption key was supplied, or is corrupted. top_ref[0]: E001800100101, top_ref[1]: 200000000, mnemonic: 2 0 0 0, fmt[0]: 0, fmt[1]: 0, flags: 0"]
0   realm-tests                         0x000000010f3b0cdc _ZN5realm4utilL18terminate_internalERNSt3__118basic_stringstreamIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE + 28
1   realm-tests                         0x000000010f3b0b93 _ZN5realm4util19terminate_with_infoEPKcS2_lS2_OSt16initializer_listINS0_9PrintableEE + 387
2   realm-tests                         0x000000010ebc3f89 _ZN5realm4util19terminate_with_infoIJPKcEEEvS3_iS3_S3_DpOT_ + 121
3   realm-tests                         0x000000010ebc3bb2 _ZZN38Realm_UnitTest__Many_ConcurrentReaders8test_runEvENK3$_3clEv + 1410
4   realm-tests                         0x000000010ebc3428 _ZN5realm4util6Thread11entry_pointIZN38Realm_UnitTest__Many_ConcurrentReaders8test_runEvE3$_3EEPvS5_ + 56
5   libsystem_pthread.dylib             0x00007ff834c3d4e1 _pthread_start + 125
6   libsystem_pthread.dylib             0x00007ff834c38f6b thread_start + 15

kiburtse · 2023-09-26T12:02:28Z

Another occurrence of the failure spotted under #6911 with master from yesterday on Jenkins and checkMacOsRelease_sync builder. It does have 'invalid mnemonic' error. What does it tell us? @finnschiermer if it's relevant for your last question: it's MacOS release build with encryption on x86_64 specifically. Not just an issues under emulator for iOS and debug build.

1: DB: 7170 Thread 0x70000be46000: Open file: /var/folders/1j/j90b894s2_1dz9jv2cys92300000gl/T/realm_JhOWdr/Many_ConcurrentReaders.1.path.realm
1: Thread[3]: /Users/realm/workspace/realm_realm-core_PR-6911/test/test_util_future.cpp:1003: Begin Future_Void_Fail_onErrorFutureAsync
1: /Users/realm/workspace/realm_realm-core_PR-6911/test/test_shared.cpp:1416: [realm-core-13.20.1] Assertion failed: unexpected_exception with (e.what()) =  ["Failed to open Realm file at path '/var/folders/1j/j90b894s2_1dz9jv2cys92300000gl/T/realm_JhOWdr/Many_ConcurrentReaders.1.path.realm': header has invalid mnemonic. The file is either not a Realm file, is an encrypted Realm file but no encryption key was supplied, or is corrupted. top_ref[0]: E001700100101, top_ref[1]: 0, mnemonic: 2 0 0 0, fmt[0]: 0, fmt[1]: 0, flags: 0"]
1: 0   realm-tests                         0x000000010a34401c _ZN5realm4utilL18terminate_internalERNSt3__118basic_stringstreamIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE + 28
1: 1   realm-tests                         0x000000010a343f2e _ZN5realm4util19terminate_with_infoEPKcS2_lS2_OSt16initializer_listINS0_9PrintableEE + 478
1: 2   realm-tests                         0x00000001099d35f6 _ZN5realm4util19terminate_with_infoIJPKcEEEvS3_iS3_S3_DpOT_ + 86
1: 3   realm-tests                         0x0000000109e901a6 _ZN5realm4util6Thread11entry_pointIZN38Realm_UnitTest__Many_ConcurrentReaders8test_runEvE3$_3EEPvS5_ + 2582
1: 4   libsystem_pthread.dylib             0x00007ff81802e4e1 _pthread_start + 125
1: 5   libsystem_pthread.dylib             0x00007ff818029f6b thread_start + 15
1: !!! IMPORTANT: Please report this at https://github.com/realm/realm-core/issues/new/choose
1/3 Test #1: CoreTests ........................Subprocess aborted***Exception:   2.91 sec

Realm version: 13.20.1 with Debug Disabled
Platform: macOS Darwin 21.6.0 Darwin Kernel Version 21.6.0: Mon Apr 24 21:10:53 PDT 2023; root:xnu-8020.240.18.701.5~1/RELEASE_X86_64 x86_64
Encryption: Enabled at compile-time (always encrypt = no)

kiburtse · 2023-10-28T13:31:00Z

Still happens with core 13.23.2:

/Users/realm/workspace/realm_realm-core_PR-6911/test/test_shared.cpp:1418: [realm-core-13.23.2] Assertion failed: unexpected_exception with (e.what()) =  ["Failed to open Realm file at path '/Users/realm/Library/Developer/CoreSimulator/Devices/11F9A429-7A46-4CF2-89E5-F3943022BCA5/data/Containers/Data/Application/7B8C3CEE-8F51-4CBC-B1CA-30F62C153718/Documents/Many_ConcurrentReaders.1.path.realm': header has invalid mnemonic. The file is either not a Realm file, is an encrypted Realm file but no encryption key was supplied, or is corrupted. top_ref[0]: E001700100101, top_ref[1]: 100000000, mnemonic: 2 0 0 0, fmt[0]: 0, fmt[1]: 0, flags: 0"]

Also the same test still fails sometimes with checkWindows_x86_Release jenkins builder but with different error as mentioned under #6547:

Exception during Many_ConcurrentReaders:
Reason: 'SetEndOfFile() failed: unknown error (1224)'

ironage · 2023-11-01T17:39:04Z

Another instance of this failure during iOS Simulator run:
Assertion failed: unexpected_exception with (e.what()) = ["Failed to open Realm file at path '/Users/realm/Library/Developer/CoreSimulator/Devices/4448661A-919D-4EC9-AC2C-094E9A2BC82C/data/Containers/Data/Application/453DB752-A18D-4629-9CBC-32BECD0E821B/Documents/Many_ConcurrentReaders.1.path.realm': header has invalid mnemonic. The file is either not a Realm file, is an encrypted Realm file but no encryption key was supplied, or is corrupted. top_ref[0]: E001700100101, top_ref[1]: 100000000, mnemonic: 2 0 0 0, fmt[0]: 0, fmt[1]: 0, flags: 0"]

kiburtse · 2023-12-21T19:47:46Z

This is still happening as of v13.25.0 on jenkins ci. So far, the failures have happened on:

checkiOSSimulator_Debug and checkMacOsRelease_sync: it manifests itself as "invalid mnemonic" error on realm open
checkWindows_x86_Release: with error like "SetEndOfFile() failed: unknown error (1224)". This is also happening in different test as tracked by Sporadic test failure LangBindHelper_ImplicitTransactions_NoExtremeFileSpaceLeaks on Windows #6547

This definitely has nothing to do with encryption. @ironage Can we infer something useful from this error code 1224 as you have commented under other issue with regard to the test and the assumption that this is the same problem on macos builders?

ironage · 2023-12-21T20:27:59Z

"SetEndOfFile() failed: unknown error (1224)" appears to be the windows error ERROR_USER_MAPPED_FILE. From what I can tell, a process is not allowed to truncate a file if another process has it open and has that end section memory mapped (or in the memory map cache?). This could indicate a problem with our file defrag in a multiprocess scenario on windows. Or it could be something simple like adding a flag to our windows memory mappings to ask the system not to cache mappings beyond their lifetime in the program.

ironage mentioned this issue Apr 17, 2023

Optimize MixedNode<Equal> unindexed #6506

Merged

3 tasks

nicola-cab mentioned this issue Apr 17, 2023

Ensure thread safety for memory mappings. #6509

Merged

3 tasks

sync-by-unito bot assigned nicola-cab Apr 18, 2023

nicola-cab assigned finnschiermer and unassigned nicola-cab and finnschiermer May 4, 2023

ironage mentioned this issue Jul 11, 2023

print logs upon Many_ConcurrentReaders test failure #6781

Merged

kiburtse mentioned this issue Oct 28, 2023

Sporadic test failure LangBindHelper_ImplicitTransactions_NoExtremeFileSpaceLeaks on Windows #6547

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jedelbo unassigned finnschiermer Aug 15, 2024

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Sporadic failure of test Many_ConcurrentReaders #6508

Sporadic failure of test Many_ConcurrentReaders #6508

ironage commented Apr 17, 2023

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ironage commented Nov 1, 2023

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ironage commented Dec 21, 2023

Sporadic failure of test Many_ConcurrentReaders #6508

Sporadic failure of test Many_ConcurrentReaders #6508

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ironage commented Apr 17, 2023

finnschiermer commented May 3, 2023

ironage commented May 3, 2023

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