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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2021) HDFS Junit test TestWriteRead failed with inconsistent visible length of a file
Date Wed, 01 Jun 2011 05:13:53 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13041987#comment-13041987
] 

Hadoop QA commented on HDFS-2021:
---------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12481034/HDFS-2021.patch
  against trunk revision 1129942.

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    -1 findbugs.  The patch appears to introduce 1 new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    -1 core tests.  The patch failed these core unit tests:
                  org.apache.hadoop.hdfs.server.namenode.TestBlockTokenWithDFS
                  org.apache.hadoop.hdfs.TestDatanodeDeath
                  org.apache.hadoop.hdfs.TestDFSUpgradeFromImage
                  org.apache.hadoop.hdfs.TestReplaceDatanodeOnFailure

    +1 contrib tests.  The patch passed contrib unit tests.

    +1 system test framework.  The patch passed system test framework compile.

Test results: https://builds.apache.org/hudson/job/PreCommit-HDFS-Build/670//testReport/
Findbugs warnings: https://builds.apache.org/hudson/job/PreCommit-HDFS-Build/670//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/hudson/job/PreCommit-HDFS-Build/670//console

This message is automatically generated.

> HDFS Junit test TestWriteRead failed with inconsistent visible length of a file 
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-2021
>                 URL: https://issues.apache.org/jira/browse/HDFS-2021
>             Project: Hadoop HDFS
>          Issue Type: Bug
>         Environment: Linux RHEL5
>            Reporter: CW Chung
>            Assignee: John George
>            Priority: Minor
>         Attachments: HDFS-2021.patch
>
>
> The junit test failed when iterates a number of times with larger chunk size on Linux.
Once a while, the visible number of bytes seen by a reader is slightly less than what was
supposed to be. 
> When run with the following parameter, it failed more often on Linux ( as reported by
John George) than my Mac:
>   private static final int WR_NTIMES = 300;
>   private static final int WR_CHUNK_SIZE = 10000;
> Adding more debugging output to the source, this is a sample of the output:
> Caused by: java.io.IOException: readData mismatch in byte read: expected=2770000 ; got
2765312
>         at org.apache.hadoop.hdfs.TestWriteRead.readData(TestWriteRead.java:141)

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