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From "Liang Xie (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7552) change FsVolumeList toString() to fix TestDataNodeVolumeFailureToleration
Date Fri, 19 Dec 2014 07:09:13 GMT
Liang Xie created HDFS-7552:

             Summary: change FsVolumeList toString() to fix TestDataNodeVolumeFailureToleration

                 Key: HDFS-7552
                 URL: https://issues.apache.org/jira/browse/HDFS-7552
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode, test
    Affects Versions: 2.7.0
            Reporter: Liang Xie
            Assignee: Liang Xie

see https://builds.apache.org/job/PreCommit-HDFS-Build/9088//testReport/org.apache.hadoop.hdfs.server.datanode/TestDataNodeVolumeFailureToleration/testValidVolumesAtStartup/

Per my understanding, it was due to:

commit 3b173d95171d01ab55042b1162569d1cf14a8d43
Author: Colin Patrick Mccabe <cmccabe@cloudera.com>
Date:   Wed Dec 17 16:41:59 2014 -0800

    HDFS-7531. Improve the concurrent access on FsVolumeList (Lei Xu via Colin P. McCabe)

-  volatile List<FsVolumeImpl> volumes = null;
+  private final AtomicReference<FsVolumeImpl[]> volumes =
+      new AtomicReference<>(new FsVolumeImpl[0]);

so the old case will complain at here:
      assertTrue("The DN should have started with this directory",

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