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https://issues.apache.org/jira/browse/HDFS-1401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13028516#comment-13028516
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Matt Foley commented on HDFS-1401:
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The following tests have failed on all or most PreCommit-HDFS-Build builds
since #408, as far back as Hudson has retained data:
org.apache.hadoop.hdfs.TestFileConcurrentReader.testUnfinishedBlockCRCErrorNormalTransfer
org.apache.hadoop.hdfs.TestFileConcurrentReader.testUnfinishedBlockCRCErrorNormalTransferVerySmallWrite
History:
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 HDFS-1401.
> 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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