[
https://issues.apache.org/jira/browse/FLINK-29114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17821114#comment-17821114
]
Jane Chan commented on FLINK-29114:
-----------------------------------
h3. A short summary
Prior to the commit, files written to the sink are temporarily stored under the
staging directory, with the following file structure.
{code:java}
target_dir/
├─ .staging_timestamp/
│ ├─ task-${subtaskId}-attempt-${attemptNumber}/{code}
When employing statement set syntax or alternative methods to write multiple
sink outputs, specifying a singular target path can inadvertently result in
various sink streams sharing the same staging directory. This scenario arises
in rare cases where System.currentTimeMillis() returns identical values across
different sinks.
In the commit phase, the staging directory is deleted once the commit is
finished. Consequently, this may lead to a situation where another sink task,
attempting to commit concurrently, fails to locate its corresponding staging
directory. The absence of the staging directory impedes the sink task's ability
to commit correctly, potentially leading to erroneous computation outcomes.
> TableSourceITCase#testTableHintWithLogicalTableScanReuse sometimes fails with
> result mismatch
> ----------------------------------------------------------------------------------------------
>
> Key: FLINK-29114
> URL: https://issues.apache.org/jira/browse/FLINK-29114
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner, Tests
> Affects Versions: 1.15.0, 1.19.0, 1.20.0
> Reporter: Sergey Nuyanzin
> Assignee: Jane Chan
> Priority: Major
> Labels: auto-deprioritized-major, pull-request-available,
> test-stability
> Attachments: FLINK-29114.log, image-2024-02-27-15-23-49-494.png,
> image-2024-02-27-15-26-07-657.png, image-2024-02-27-15-32-48-317.png
>
>
> It could be reproduced locally by repeating tests. Usually about 100
> iterations are enough to have several failed tests
> {noformat}
> [ERROR] Tests run: 13, Failures: 1, Errors: 0, Skipped: 0, Time elapsed:
> 1.664 s <<< FAILURE! - in
> org.apache.flink.table.planner.runtime.batch.sql.TableSourceITCase
> [ERROR]
> org.apache.flink.table.planner.runtime.batch.sql.TableSourceITCase.testTableHintWithLogicalTableScanReuse
> Time elapsed: 0.108 s <<< FAILURE!
> java.lang.AssertionError: expected:<List(1,1,Hi, 2,2,Hello, 2,2,Hello,
> 3,2,Hello world, 3,2,Hello world, 3,2,Hello world)> but was:<List(1,1,Hi,
> 2,2,Hello, 2,2,Hello, 3,2,Hello world, 3,2,Hello world)>
> at org.junit.Assert.fail(Assert.java:89)
> at org.junit.Assert.failNotEquals(Assert.java:835)
> at org.junit.Assert.assertEquals(Assert.java:120)
> at org.junit.Assert.assertEquals(Assert.java:146)
> at
> org.apache.flink.table.planner.runtime.batch.sql.TableSourceITCase.testTableHintWithLogicalTableScanReuse(TableSourceITCase.scala:428)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> at
> org.apache.flink.util.TestNameProvider$1.evaluate(TestNameProvider.java:45)
> at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:61)
> at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> at
> org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
> at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
> at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
> at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
> at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
> at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
> at
> org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:42)
> at
> org.junit.vintage.engine.VintageTestEngine.executeAllChildren(VintageTestEngine.java:80)
> at
> org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:72)
> at
> org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107)
> at
> org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
> at
> org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
> at
> org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
> at
> org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
> at
> org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)
> at
> org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86)
> at
> org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86)
> at
> org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53)
> at
> org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.lambda$execute$1(JUnitPlatformProvider.java:199)
> at java.util.Iterator.forEachRemaining(Iterator.java:116)
> at
> org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.execute(JUnitPlatformProvider.java:193)
> at
> org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:154)
> at
> org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:120)
> at
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:428)
> at
> org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:162)
> at
> org.apache.maven.surefire.booter.ForkedBooter.run(ForkedBooter.java:562)
> at
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:548)
> {noformat}
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