[jira] [Created] (OAK-9869) Flaky test: FlatFileStoreTest

["Joerg Hoh (Jira)" <ji...@apache.org>]

Joerg Hoh created OAK-9869:
------------------------------

             Summary: Flaky test: FlatFileStoreTest
                 Key: OAK-9869
                 URL: https://issues.apache.org/jira/browse/OAK-9869
             Project: Jackrabbit Oak
          Issue Type: Task
          Components: indexing
    Affects Versions: 1.44.0
            Reporter: Joerg Hoh


On my local machine I have this flaky testcase:

{noformat}
[INFO] Running org.apache.jackrabbit.oak.index.indexer.document.flatfile.FlatFileStoreTest
[ERROR] Tests run: 9, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 3.244 s <<< FAILURE! - in org.apache.jackrabbit.oak.index.indexer.document.flatfile.FlatFileStoreTest
[ERROR] 
resumePreviousUnfinishedDownload(org.apache.jackrabbit.oak.index.indexer.document.flatfile.FlatFileStoreTest)  Time elapsed: 0.331 s  <<< FAILURE!
java.lang.AssertionError: expected:<45> but was:<46>
	at org.junit.Assert.fail(Assert.java:89)
	at org.junit.Assert.failNotEquals(Assert.java:835)
	at org.junit.Assert.assertEquals(Assert.java:647)
	at org.junit.Assert.assertEquals(Assert.java:633)
	at org.apache.jackrabbit.oak.index.indexer.document.flatfile.FlatFileStoreTest.resumePreviousUnfinishedDownload(FlatFileStoreTest.java:224)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	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.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
	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.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
{noformat}

it is flaky in a way, that it consistently breaks my build. And when I retry it using

{noformat}
MAVEN_OPTS="-Xmx1536M" mvn clean install -rf : oak-run-commons
{noformat}

it passes. This happens even if I don't try to build all Oak in the first place, but just start with this module.

{noformat}
$ mvn -version                                                                                                                                                                                       
Apache Maven 3.8.6 (84538c9988a25aec085021c365c560670ad80f63)
Maven home: /opt/homebrew/Cellar/maven/3.8.6/libexec
Java version: 11.0.15, vendor: Eclipse Adoptium, runtime: /Users/joerg/java/jdk-11.0.15+10-amd64/Contents/Home
Default locale: en_DE, platform encoding: UTF-8
OS name: "mac os x", version: "12.4", arch: "x86_64", family: "mac"
{noformat}

This is an x86-64 Java on ARM (Mac M1 Max)




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