Apps ANR because of librealm-jni.so(10.0.1) blocked on mobile devices which bases on kernel 5.10

[Shirleynice]

Goal

Apps can run successfully

Actual Results

Actual: Apps ANR.
Note: The issue just can reproduce on mobile device which uses kernel5.10.

======================================================

suspend all histogram: Sum: 129us 99% C.I. 2us-53us Avg: 16.125us Max: 53us
DALVIK THREADS (129):
"Signal Catcher" daemon prio=10 tid=5 Runnable
| group="system" sCount=0 ucsCount=0 flags=0 obj=0x147001c0 self=0xd92c0010
| sysTid=29156 nice=-20 cgrp=system sched=0/0 handle=0xd05b01c0
| state=R schedstat=( 11550209 172188 7 ) utm=0 stm=0 core=6 HZ=100
| stack=0xd04b5000-0xd04b7000 stackSize=1004KB
| held mutexes= "mutator lock"(shared held)
native: #00 pc 00383b4d /apex/com.android.art/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits >&, int, BacktraceMap*, char const*, art::ArtMethod*, void*, bool)+76)
native: #1 pc 0045ea0f /apex/com.android.art/lib/libart.so (art::Thread::DumpStack(std::__1::basic_ostream<char, std::__1::char_traits >&, bool, BacktraceMap*, bool) const+214)
native: #2 pc 0047658d /apex/com.android.art/lib/libart.so (art::DumpCheckpoint::Run(art::Thread*)+656)
native: #3 pc 00471af9 /apex/com.android.art/lib/libart.so (art::ThreadList::RunCheckpoint(art::Closure*, art::Closure*)+348)
native: #4 pc 00471067 /apex/com.android.art/lib/libart.so (art::ThreadList::Dump(std::__1::basic_ostream<char, std::__1::char_traits >&, bool)+1222)
native: #5 pc 00470aab /apex/com.android.art/lib/libart.so (art::ThreadList::DumpForSigQuit(std::__1::basic_ostream<char, std::__1::char_traits >&)+1138)
native: #6 pc 0042a771 /apex/com.android.art/lib/libart.so (art::Runtime::DumpForSigQuit(std::__1::basic_ostream<char, std::__1::char_traits >&)+140)
native: #7 pc 0043a8c7 /apex/com.android.art/lib/libart.so (art::SignalCatcher::HandleSigQuit()+1034)
native: #8 pc 00439c8d /apex/com.android.art/lib/libart.so (art::SignalCatcher::Run(void*)+248)
native: #9 pc 00081047 /apex/com.android.runtime/lib/bionic/libc.so (__pthread_start(void*)+40)
native: #10 pc 00039e33 /apex/com.android.runtime/lib/bionic/libc.so (__start_thread+30)
(no managed stack frames)

"main" prio=5 tid=1 Native
| group="main" sCount=1 ucsCount=0 flags=1 obj=0x724e5d48 self=0xd92c6210
| sysTid=29149 nice=-10 cgrp=system sched=0/0 handle=0xe8321470
| state=S schedstat=( 2134506845 220278645 17992 ) utm=151 stm=61 core=5 HZ=100
| stack=0xff1e0000-0xff1e2000 stackSize=8188KB
| held mutexes=
native: #00 pc 00033fb4 /apex/com.android.runtime/lib/bionic/libc.so (syscall+28)
native: #1 pc 00039803 /apex/com.android.runtime/lib/bionic/libc.so (__futex_wait_ex(void volatile*, bool, int, bool, timespec const*)+94)
native: #2 pc 00080641 /apex/com.android.runtime/lib/bionic/libc.so (pthread_cond_wait+32)
native: #3 pc 001625d4 /data/app/~~MRnOHr-qfic_V8XDGlDUwg==/com.dotreader.dnovel-oArJHMOvQpzWoe87ekpRQQ==/lib/arm/librealm-jni.so (???)
native: #4 pc 0007ce1b /data/app/~~MRnOHr-qfic_V8XDGlDUwg==/com.dotreader.dnovel-oArJHMOvQpzWoe87ekpRQQ==/lib/arm/librealm-jni.so (???)
native: #5 pc 00090e03 /data/app/~~MRnOHr-qfic_V8XDGlDUwg==/com.dotreader.dnovel-oArJHMOvQpzWoe87ekpRQQ==/lib/arm/librealm-jni.so (???)
native: #6 pc 00091237 /data/app/~~MRnOHr-qfic_V8XDGlDUwg==/com.dotreader.dnovel-oArJHMOvQpzWoe87ekpRQQ==/lib/arm/librealm-jni.so (???)
native: #7 pc 00082349 /data/app/~~MRnOHr-qfic_V8XDGlDUwg==/com.dotreader.dnovel-oArJHMOvQpzWoe87ekpRQQ==/lib/arm/librealm-jni.so (???)
native: #8 pc 000748db /data/app/~~MRnOHr-qfic_V8XDGlDUwg==/com.dotreader.dnovel-oArJHMOvQpzWoe87ekpRQQ==/lib/arm/librealm-jni.so (???)
native: #9 pc 0002e025 /data/app/~~MRnOHr-qfic_V8XDGlDUwg==/com.dotreader.dnovel-oArJHMOvQpzWoe87ekpRQQ==/lib/arm/librealm-jni.so (Java_io_realm_internal_SharedRealm_nativeBeginTransaction+28)
at io.realm.internal.SharedRealm.nativeBeginTransaction(Native method)
at io.realm.internal.SharedRealm.s(SharedRealm.java:5)
at io.realm.a.x(BaseRealm.java:2)
at io.realm.a.beginTransaction(BaseRealm.java:1)
at io.realm.l.beginTransaction(Realm.java:1)
at com.pickuplight.dreader.common.database.a.f$a.a(ReportDataDao.java:4)
at com.pickuplight.dreader.common.database.a.f$a.onSuccess(ReportDataDao.java:1)
at h.r.a.e$a.run(CallbackDelegate.java:1)
at h.r.a.a$a.run(AndroidDeliver.java:1)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7818)
at java.lang.reflect.Method.invoke(Native method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:980)

Steps & Code to Reproduce

1). Launch 3rd Apps in a mobile device which user kernel 5.10
2) Give Apps runtime permission;

Expect: Apps run successfully;

Actual: Apps ANR.
Note: The issue just can reproduce on mobile device which uses kernel5.10.

Version of Realm and tooling

Realm version(s): 10.0.1

Realm Sync feature enabled: Yes

Android Studio version: ?

Android Build Tools version: ?

Gradle version: ?

Which Android version and device(s): ?

[cmelchior]

Hi @Shirleynice

There is a known issue in the 5.x Linux kernel. It sounds like what you could be hitting. We shipped a fix to this in 10.5.1: https://github.com/realm/realm-java/blob/master/CHANGELOG.md#1051-2021-06-14

Can you try to upgrade and see if that fixes the problem?

[Shirleynice]

Hi cmelchior,

Thanks for your feedback. Because the app is 3rd, we don't have source code. Would you please provide the fix gerrit?

Thanks,
Xiaoli

[bmunkholm]

@Shirleynice If you don't have the source code the app, there is nothing we can do unfortunately. You will have to get the author of the app to use Realm version 10.5.1 or later.