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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9347) Invariant assumption in TestQuorumJournalManager.shutdown() is wrong
Date Tue, 17 Nov 2015 18:06:11 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9347?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wei-Chiu Chuang updated HDFS-9347:
----------------------------------
    Attachment: HDFS-9347.002.patch

Thanks [~walter.k.su] for the suggestion!
I refactored the code to reduce duplication in my rev02 code.

FYI, there are two currently two tests in TestCheckpoint and TestEditLogAutoroll that use
GenericTestUtils.assertNoThreadsMatching().


> Invariant assumption in TestQuorumJournalManager.shutdown() is wrong
> --------------------------------------------------------------------
>
>                 Key: HDFS-9347
>                 URL: https://issues.apache.org/jira/browse/HDFS-9347
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Wei-Chiu Chuang
>            Assignee: Wei-Chiu Chuang
>         Attachments: HDFS-9347.001.patch, HDFS-9347.002.patch
>
>
> The code
> {code:title=TestTestQuorumJournalManager.java|borderStyle=solid}
> @After
>   public void shutdown() throws IOException {
>     IOUtils.cleanup(LOG, toClose.toArray(new Closeable[0]));
>     
>     // Should not leak clients between tests -- this can cause flaky tests.
>     // (See HDFS-4643)
>     GenericTestUtils.assertNoThreadsMatching(".*IPC Client.*");
>     
>     if (cluster != null) {
>       cluster.shutdown();
>     }
>   }
> {code}
> implicitly assumes when the call returns from IOUtils.cleanup() (which calls close()
on QuorumJournalManager object), all IPC client connection threads are terminated. However,
there is no internal implementation that enforces this assumption. Even if the bug reported
in HADOOP-12532 is fixed, the internal code still only ensures IPC connections are terminated,
but not the thread.



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