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From "Matt Foley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1401) TestFileConcurrentReader test case is still timing out / failing
Date Wed, 04 May 2011 00:08:03 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13028516#comment-13028516

Matt Foley commented on HDFS-1401:

The following tests have failed on all or most PreCommit-HDFS-Build builds since #408, as
far back as Hudson has retained data:



HDFS-1057 committed 01/Jul/10, fixed "Concurrent readers hit ChecksumExceptions if following
a writer to very end of file"
* created new unit test TestFileConcurrentReader
HDFS-1310 opened 20/Jul/10, committed 10/Sep/10, fixed failure in TestFileConcurrentReader
to shut down multiple proxy objects ("too many open files" bug)
* next layer of the onion is intermittent
HDFS-1401 opened 14/Sep/10, unresolved.  Has log snippets showing more intermittent "too many
open files" errors, and complaints of timeouts.
HDFS-1679 opened 01/Mar/11, one more data point for continuing problem.  Closed as duplicate
of HDFS-1401.
HDFS-1885 opened 03/May/11, regarding on-going recurrent problem.  Closed as duplicate of

> TestFileConcurrentReader test case is still timing out / failing
> ----------------------------------------------------------------
>                 Key: HDFS-1401
>                 URL: https://issues.apache.org/jira/browse/HDFS-1401
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>    Affects Versions: 0.22.0
>            Reporter: Tanping Wang
>            Priority: Critical
>         Attachments: HDFS-1401.patch
> The unit test case, TestFileConcurrentReader after its most recent fix in HDFS-1310 still
times out when using java 1.6.0_07.  When using java 1.6.0_07, the test case simply hangs.
 On apache Hudson build ( which possibly is using a higher sub-version of java) this test
case has presented an inconsistent test result that it sometimes passes, some times fails.
For example, between the most recent build 423, 424 and build 425, there is no effective change,
however, the test case failed on build 424 and passed on build 425
> build 424 test failed
> https://hudson.apache.org/hudson/job/Hadoop-Hdfs-trunk/424/testReport/org.apache.hadoop.hdfs/TestFileConcurrentReader/
> build 425 test passed
> https://hudson.apache.org/hudson/job/Hadoop-Hdfs-trunk/425/testReport/org.apache.hadoop.hdfs/TestFileConcurrentReader/

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