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https://issues.apache.org/jira/browse/CASSANDRA-15313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17031710#comment-17031710
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Brandon Williams commented on CASSANDRA-15313:
----------------------------------------------
bq. "it" is the failing case; sorry for the confusion. By lowering the examples
we will need to run the test more before we see the failing case.
That is not true, though. The key to reproducing the failing case is defining
the seed that makes it fail, which can then reproduce it with only 20 examples
(I updated my branch to reflect this, and isolated it to the
corruptionCausesFailure test. You still need to override the timeout to be
long enough for it to fail, I use -Dtest.timeout=60000000) I probably did a
few thousand runs before I came across that seed, though.
bq. I took a stab at fixing it and attaching a hack patch to the JIRA to show;
This looks good but you also removed the examples from corruptionCausesFailure.
With them added back everything seems to pass fine at 200 examples. I'll try
another run with 500 and report back.
> Fix flaky - ChecksummingTransformerTest -
> org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest
> -------------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-15313
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15313
> Project: Cassandra
> Issue Type: Bug
> Components: Test/dtest
> Reporter: Vinay Chella
> Assignee: Brandon Williams
> Priority: Normal
> Fix For: 4.0-alpha
>
> Attachments: CASSANDRA-15313-hack.patch
>
>
> During the recent runs, this test appears to be flaky.
> Example failure:
> [https://circleci.com/gh/vinaykumarchella/cassandra/459#tests/containers/94]
> corruptionCausesFailure-compression -
> org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest
> {code:java}
> java.lang.OutOfMemoryError: GC overhead limit exceeded
> at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:57)
> at java.nio.ByteBuffer.allocate(ByteBuffer.java:335)
> at org.quicktheories.impl.Precursor.<init>(Precursor.java:17)
> at
> org.quicktheories.impl.ConcreteDetachedSource.<init>(ConcreteDetachedSource.java:8)
> at
> org.quicktheories.impl.ConcreteDetachedSource.detach(ConcreteDetachedSource.java:23)
> at org.quicktheories.generators.Retry.generate(CodePoints.java:51)
> at
> org.quicktheories.generators.Generate.lambda$intArrays$10(Generate.java:190)
> at
> org.quicktheories.generators.Generate$$Lambda$17/1847008471.generate(Unknown
> Source)
> at org.quicktheories.core.DescribingGenerator.generate(Gen.java:255)
> at org.quicktheories.core.Gen.lambda$map$0(Gen.java:36)
> at org.quicktheories.core.Gen$$Lambda$20/71399214.generate(Unknown
> Source)
> at org.quicktheories.core.Gen.lambda$map$0(Gen.java:36)
> at org.quicktheories.core.Gen$$Lambda$20/71399214.generate(Unknown
> Source)
> at org.quicktheories.core.Gen.lambda$mix$10(Gen.java:184)
> at org.quicktheories.core.Gen$$Lambda$45/802243390.generate(Unknown
> Source)
> at org.quicktheories.core.Gen.lambda$flatMap$5(Gen.java:93)
> at org.quicktheories.core.Gen$$Lambda$48/363509958.generate(Unknown
> Source)
> at
> org.quicktheories.dsl.TheoryBuilder4.lambda$prgnToTuple$12(TheoryBuilder4.java:188)
> at
> org.quicktheories.dsl.TheoryBuilder4$$Lambda$40/2003496028.generate(Unknown
> Source)
> at org.quicktheories.core.DescribingGenerator.generate(Gen.java:255)
> at org.quicktheories.core.FilteredGenerator.generate(Gen.java:225)
> at org.quicktheories.core.Gen.lambda$map$0(Gen.java:36)
> at org.quicktheories.core.Gen$$Lambda$20/71399214.generate(Unknown
> Source)
> at org.quicktheories.impl.Core.generate(Core.java:150)
> at org.quicktheories.impl.Core.shrink(Core.java:103)
> at org.quicktheories.impl.Core.run(Core.java:39)
> at org.quicktheories.impl.TheoryRunner.check(TheoryRunner.java:35)
> at org.quicktheories.dsl.TheoryBuilder4.check(TheoryBuilder4.java:150)
> at
> org.quicktheories.dsl.TheoryBuilder4.checkAssert(TheoryBuilder4.java:162)
> at
> org.apache.cassandra.transport.frame.checksum.ChecksummingTransformerTest.corruptionCausesFailure(ChecksummingTransformerTest.java:87)
> {code}
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