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https://issues.apache.org/jira/browse/HBASE-30166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18082809#comment-18082809
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Hudson commented on HBASE-30166:
--------------------------------
Results for branch branch-2.6
[build #467 on
builds.a.o|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.6/467/]:
(/) *{color:green}+1 overall{color}*
----
details (if available):
(/) {color:green}+1 general checks{color}
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(/) {color:green}+1 jdk11 hadoop3 checks{color}
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> Attempt to fix flakeyness in TestPrefetchPersistence
> -----------------------------------------------------
>
> Key: HBASE-30166
> URL: https://issues.apache.org/jira/browse/HBASE-30166
> Project: HBase
> Issue Type: Bug
> Affects Versions: 3.0.0-beta-1, 2.7.0, 2.6.5
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.0.0, 2.7.0, 2.6.6
>
>
> TestPrefetchPersistence seems to intermittently fail due to at least two
> conditions:
> 1)
> TestPrefetchPersistence.testPrefetchPersistence()[1] -- Time elapsed: 8.291 s
> <<< FAILURE!
> org.opentest4j.AssertionFailedError: expected: <true> but was: <false>
> at
> org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
> at
> org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
> at org.junit.jupiter.api.AssertTrue.failNotTrue(AssertTrue.java:63)
> at org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:36)
> at org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:31)
> at org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:183)
> at
> org.apache.hadoop.hbase.io.hfile.bucket.TestPrefetchPersistence.testPrefetchPersistence(TestPrefetchPersistence.java:128)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.util.Optional.ifPresent(Optional.java:159)
> at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
> at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
> at
> java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:419)
> at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
> at
> java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
> at
> java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
> at
> java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
> at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
> at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485)
> at java.util.ArrayList.forEach(ArrayList.java:1259)
> at java.util.ArrayList.forEach(ArrayList.java:1259)
>
> 2) org.opentest4j.AssertionFailedError: expected: <0> but was: <353280>
> at
> org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
> at
> org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
> at org.junit.jupiter.api.AssertEquals.failNotEqual(AssertEquals.java:197)
> at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:166)
> at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:161)
> at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:632)
> at
> org.apache.hadoop.hbase.io.hfile.bucket.TestPrefetchPersistence.testPrefetchPersistence(TestPrefetchPersistence.java:110)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.util.Optional.ifPresent(Optional.java:159)
> at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
> at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
> at
> java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:419)
> at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
> at
> java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
> at
> java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
> at
> java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
> at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
> at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485)
> at java.util.ArrayList.forEach(ArrayList.java:1259)
> at java.util.ArrayList.forEach(ArrayList.java:1259)
>
> The condition #1 may happen because we are currently checking only if the
> prefetch reader has finished, before proceeding with the cache shutdown,
> however the actual cache writers may have not yet all blocks to the cache,
> causing the given files to never be actually added to the "fullyCachedFiles"
> map.
>
> Condition #2 may happen in subsequent parameterized runs where the created
> BucketCache instance is reusing cache and persistent file from previous runs.
> We should add an @AfterEach method for cleaning up the test dirs.
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