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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TEPHRA-253) TransactionProcessorTest is sometimes flaky
Date Mon, 11 Sep 2017 04:10:01 GMT

    [ https://issues.apache.org/jira/browse/TEPHRA-253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16160643#comment-16160643
] 

ASF GitHub Bot commented on TEPHRA-253:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/incubator-tephra/pull/54


> TransactionProcessorTest is sometimes flaky
> -------------------------------------------
>
>                 Key: TEPHRA-253
>                 URL: https://issues.apache.org/jira/browse/TEPHRA-253
>             Project: Tephra
>          Issue Type: Bug
>    Affects Versions: 0.12.0-incubating
>            Reporter: Andreas Neumann
>            Assignee: Andreas Neumann
>             Fix For: 0.13.0-incubating
>
>
> The test sometimes fails as follows:
> {noformat}
> Running org.apache.tephra.hbase.coprocessor.TransactionProcessorTest
> Tests run: 6, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 7.741 sec <<<
FAILURE!
> testFamilyDeleteTimestamp(org.apache.tephra.hbase.coprocessor.TransactionProcessorTest)
 Time elapsed: 1.526 sec
> testTransactionStateCache(org.apache.tephra.hbase.coprocessor.TransactionProcessorTest)
 Time elapsed: 0.053 sec
> testDataJanitorRegionScanner(org.apache.tephra.hbase.coprocessor.TransactionProcessorTest)
 Time elapsed: 0.288 sec  <<< FAILURE!
> org.junit.internal.ArrayComparisonFailure: arrays first differed at element [3]; expected:<4>
but was:<1>
> 	at org.junit.internal.ComparisonCriteria.arrayEquals(ComparisonCriteria.java:50)
> 	at org.junit.Assert.internalArrayEquals(Assert.java:473)
> 	at org.junit.Assert.assertArrayEquals(Assert.java:294)
> 	at org.junit.Assert.assertArrayEquals(Assert.java:305)
> 	at org.apache.tephra.hbase.coprocessor.TransactionProcessorTest.assertKeyValueMatches(TransactionProcessorTest.java:593)
> 	at org.apache.tephra.hbase.coprocessor.TransactionProcessorTest.assertKeyValueMatches(TransactionProcessorTest.java:585)
> 	at org.apache.tephra.hbase.coprocessor.TransactionProcessorTest.testDataJanitorRegionScanner(TransactionProcessorTest.java:190)
> {noformat}
> It is not clear what is causing this, most likely the region server did not have an up-to-date
transaction state snapshot at the time of the lfush (that might be due to TEPHRA-239 orTEPHRA-249,
or it might be a condition where flush() has no effect because the region is already flushing,

> Let's observe this and gather more information when/if it happens again. 



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