Unix.Unix_error(Unix.EINVAL, "select", "") on Linux

[jonahbeckford]

DkCoder is not building with libev on Linux, but it should. Same issue as ocsigen/lwt#222.

An integration test with more than 1024 open files inside Lwt should be added to validate libev is being used.

Symptoms

The following appears consistently when running an DkAssets_Std-Upload job after several downloads. The Lwt_engine.select#select means that libev was not built (confer https://github.com/ocsigen/lwt/blob/e625c09af4840cb035c4df237355cef6cdd8a300/src/unix/lwt_engine.ml#L406-L422):

DkAssets_Std-Upload.bc: [INFO] ARCHIVED         online/qtsdkrepository/windows_x86/desktop/qt5_5152/qt.qt5.5152.debug_info.win64_msvc2019_64/5.15.2-0-202011130602qtserialport-Windows-Windows_10-MSVC2019-Windows-Windows_10-X86_64-debug-symbols.7z.sha256
DkAssets_Std-Upload.bc: [INFO] Downloading https://mirrors.ocf.berkeley.edu/qt/online/qtsdkrepository/windows_x86/desktop/qt5_5152/qt.qt5.5152.qtpurchasing.win64_msvc2019_64/5.15.2-0-202011130602qtpurchasing-Windows-Windows_10-MSVC2019-Windows-Windows_10-X86_64.7z
Fatal error: exception Unix.Unix_error(Unix.EINVAL, "select", "")
Raised by primitive operation at unknown location
Called from Lwt_engine.select#select in file "build/_deps/lwt-src/src/unix/lwt_engine.ml", line 407, characters 26-60
Called from unknown location
Re-raised at Lwt_engine.select_based#iter in file "build/_deps/lwt-src/src/unix/lwt_engine.ml", line 359, characters 4-256
Called from Lwt_main.run.run_loop in file "build/_deps/lwt-src/src/unix/lwt_main.ml", line 36, characters 6-49
Called from Lwt_main.run in file "build/_deps/lwt-src/src/unix/lwt_main.ml", line 106, characters 8-13
Re-raised at Lwt_main.run in file "build/_deps/lwt-src/src/unix/lwt_main.ml", line 112, characters 4-13
Called from DkAssets_Std__Up865e89dead__Upload.get_asset_file_from_origin.(fun) in file "src/DkAssets_Std/Upload.ml", line 82, characters 10-207
Called from Stdlib__List.iter in file "list.ml", line 110, characters 12-15
Called from DkAssets_Std__Up865e89dead__Upload.get_asset_file_from_origin in file "src/DkAssets_Std/Upload.ml", line 73, characters 4-745
Re-raised at DkAssets_Std__Up865e89dead__Upload.sha256_file.(fun).feedloop in file "src/DkAssets_Std/Upload.ml", line 61, characters 25-204
Called from DkAssets_Support__Da2836f73cel__DataModel.S3.upload_asset_version_A in file "src/DkAssets_Support/DataModel.ml", line 295, characters 29-58
Called from DkAssets_Support__Da2836f73cel__DataModel.S3.upload_asset_version.(fun) in file "src/DkAssets_Support/DataModel.ml", line 329, characters 10-115
Called from Stdlib__List.fold_left in file "list.ml", line 121, characters 24-34
Called from DkAssets_Support__Da2836f73cel__DataModel.S3.upload_asset_version in file "src/DkAssets_Support/DataModel.ml", line 326, characters 6-229
Called from DkAssets_Std__Up865e89dead__Upload.upload.(fun) in file "src/DkAssets_Std/Upload.ml", line 204, characters 8-121
Called from Stdlib__List.iter in file "list.ml", line 110, characters 12-15
Called from DkAssets_Std__Up865e89dead__Upload.__init in file "src/DkAssets_Std/Upload.ml", line 259, characters 4-181
Called from Dune__exe__UploadX__ in file "#s/DkAssets_Std/UploadX__.ml", line 4, characters 9-23
[ERROR][2025-01-31T12:40:02Z] /Run/
       Problem
       -------
       Failed to DkAssets_Std.Upload script. Code: 516e251b.
       
       
       Underlying Error
       ----------------
       run
         ['/builds/diskuv/distributions/1.0/DkAssets/.z-dk/tools/coder/h/2.2.1-4/bin/ocamlrunx'
             
         '/builds/diskuv/distributions/1.0/DkAssets/_build/install/default/bin/DkAssets_Std-Upload.bc'
              '--spec-json-url'
             
         'untrusted/specs/qt-desktop-5.15.2.plaintext.json#e225a52861965b46c767551d3292abe6a9d62473703b81d253189f3b719369ed'
              '--log-level' 'INFO' '--sensitive-cache-dir' 's-cache']: exited
         with 2

[jonahbeckford]

Also lwt is at 5.7.0 when it should be the latest 5.9.0:

# SYNC: dksdk-cmake/cmake/compiler/create.cmake, dksdk-coder/ci/opamrepo/packages/lwt, dksdk-coder/src/SelfCode_Std/Metadata.ml, dksdk-cmake/cmake/DkSDKSupportedContent.cmake