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https://issues.apache.org/jira/browse/HDFS-17265?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jian Zhang reassigned HDFS-17265:
---------------------------------
Assignee: Jian Zhang
> RBF: Throwing an exception prevents the semaphore from being released when
> using FairnessPolicyController
> ---------------------------------------------------------------------------------------------------------
>
> Key: HDFS-17265
> URL: https://issues.apache.org/jira/browse/HDFS-17265
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Jian Zhang
> Assignee: Jian Zhang
> Priority: Major
>
> *Bug description*
> When the router uses FairnessPolicyController, each time a request is
> processed,
> the permit of the ns corresponding to the request will be obtained first
> {*}(method acquirePermit){*},
> and then the information of namenodes corresponding to the ns will be
> obtained{*}(method getOrderedNamenodes){*}.
> getOrderedNamenodes comes after acquirePermit, so if acquirePermit succeeds
> but getOrderedNamenodes throws an exception, the permit cannot be released.
>
> *How to reproduce*
> Use the original code to run the new unit test
> testReleasedWhenExceptionOccurs in this PR
>
>
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