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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-14331) HadoopScheduledThreadPoolExecutor broken for periodic task running
Date Sat, 22 Apr 2017 00:02:04 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-14331?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Wang updated HADOOP-14331:
---------------------------------
    Affects Version/s:     (was: 3.0.0-alpha3)
                       2.8.0
                       3.0.0-alpha1
     Target Version/s: 2.8.1, 3.0.0-alpha3

> HadoopScheduledThreadPoolExecutor broken for periodic task running
> ------------------------------------------------------------------
>
>                 Key: HADOOP-14331
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14331
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: common
>    Affects Versions: 2.8.0, 3.0.0-alpha1
>            Reporter: Gabriel Reid
>            Assignee: Gabriel Reid
>         Attachments: HADOOP-14331_demonstrate_bug.patch
>
>
> The HadoopScheduledThreadPoolExecutor (introduced in HADOOP-12749) is broken for the
scheduling of periodic tasks (i.e. for tasks submitted with {{scheduleAtFixedRate}} and {{scheduleAfterFixedDelay}}).
> The behavior of the executor with these methods is that the underlying task is executed
once, and then blocks the running thread indefinitely in {{ExecutorHelper::logThrowableFromAfterExecute}},
meaning further executions of the task won't run, and will also block the running thread from
running any other tasks.
> A quick scan of the source has shown me that these methods are used on HadoopScheduledThreadPoolExecutor
instances in several places in the code base, at least in {{JobHistory}} and {{CleanerService}},
which appears to mean that these classes also no longer function correctly.



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