[jira] [Updated] (PHOENIX-6284) Flaky test UpgradeIT.testConcurrentUpgradeThrowsUpgradeInProgressException

["Viraj Jasani (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PHOENIX-6284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Viraj Jasani updated PHOENIX-6284:
----------------------------------
    Affects Version/s: 5.0.0
                       4.15.0

> Flaky test UpgradeIT.testConcurrentUpgradeThrowsUpgradeInProgressException
> --------------------------------------------------------------------------
>
>                 Key: PHOENIX-6284
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-6284
>             Project: Phoenix
>          Issue Type: Test
>    Affects Versions: 5.0.0, 4.15.0
>            Reporter: Viraj Jasani
>            Priority: Major
>
> UpgradeIT.testConcurrentUpgradeThrowsUpgradeInProgressException is sometimes failing with error logs:
> {code:java}
> java.lang.AssertionError: One and only one thread should have acquired the mutex . Actual: true
> 	at org.junit.Assert.fail(Assert.java:89)
> 	at org.junit.Assert.failEquals(Assert.java:187)
> 	at org.junit.Assert.assertNotEquals(Assert.java:163)
> 	at org.apache.phoenix.end2end.UpgradeIT.testConcurrentUpgradeThrowsUprgadeInProgressException(UpgradeIT.java:237)
> {code}
> While testing if 2 threads can simultaneously acquire lock, we release the lock immediately in finally for individual thread if it had acquired the mutex. This can lead to failure if one of the threads starts executing (due to slowness) only after the other thread releases mutex cell. In that case, the sequence of mutex acquisition would be:
> Thread1 acquires -> Thread1 releases -> Thread2 acquires -> Thread2 releases
> Because of this sequence, the above mentioned AssertionError can occur.



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