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Date: Wed, 17 Oct 2012 13:22:20 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-4055) TestAuditLogs is flaky
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    [ https://issues.apache.org/jira/browse/HDFS-4055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477864#comment-13477864 ] 

Hudson commented on HDFS-4055:
------------------------------

Integrated in Hadoop-Mapreduce-trunk #1228 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1228/])
    HDFS-4055. TestAuditLogs is flaky. Contributed by Binglin Chang (Revision 1399093)

     Result = FAILURE
eli : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1399093
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestAuditLogs.java

                
> TestAuditLogs is flaky
> ----------------------
>
>                 Key: HDFS-4055
>                 URL: https://issues.apache.org/jira/browse/HDFS-4055
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Binglin Chang
>            Assignee: Binglin Chang
>             Fix For: 2.0.3-alpha
>
>         Attachments: HDFS-4055-TestAuditLogs-bug.patch
>
>
> {code}
>     InputStream istream = webfs.open(file);
>     int val = istream.read();
>     istream.close();
>     verifyAuditLogsRepeat(true, 3);
>     assertTrue("failed to read from file", val >= 0);
> {code}
> {code}
>     byte[] toWrite = new byte[bufferLen];
>     Random rb = new Random(seed);
>     long bytesToWrite = fileLen;
>     while (bytesToWrite>0) {
>       rb.nextBytes(toWrite);
> {code}
> InputStream.read() return the first byte of the file, the bytes in the file is generated in using Random.nextBytes(), so you get 1/256 chance the first byte is 0, so some times it may fail.

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