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Date: Sat, 3 Dec 2011 15:46:40 +0000 (UTC)
From: "Hadoop QA (Commented) (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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 <270983962.37523.1322927200283.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (HDFS-776) Fix exception handling in Balancer
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    [ https://issues.apache.org/jira/browse/HDFS-776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13162165#comment-13162165 ] 

Hadoop QA commented on HDFS-776:
--------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12505987/HDFS-776.patch
  against trunk revision .

    +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 does not introduce any 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 unit tests:
                  org.apache.hadoop.hdfs.TestDatanodeDeath
                  org.apache.hadoop.hdfs.TestFileAppend2
                  org.apache.hadoop.hdfs.TestDFSClientRetries
                  org.apache.hadoop.hdfs.TestInjectionForSimulatedStorage
                  org.apache.hadoop.hdfs.TestSetrepIncreasing

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/1631//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/1631//console

This message is automatically generated.
                
> Fix exception handling in Balancer
> ----------------------------------
>
>                 Key: HDFS-776
>                 URL: https://issues.apache.org/jira/browse/HDFS-776
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer
>            Reporter: Owen O'Malley
>            Assignee: Uma Maheswara Rao G
>            Priority: Critical
>         Attachments: HDFS-776.0.patch, HDFS-776.patch, HDFS-776.patch
>
>
> The Balancer's AccessKeyUpdater handles exceptions badly. In particular:
> 1. Catching Exception too low. The wrapper around setKeys should only catch IOException.
> 2. InterruptedException is ignored. It should be caught at the top level and exit run.
> 3. Throwable is not caught. It should be caught at the top level and kill the Balancer server process.
> {code}
>   class AccessKeyUpdater implements Runnable {
>     public void run() {
>       while (shouldRun) {
>         try {
>           accessTokenHandler.setKeys(namenode.getAccessKeys());
>         } catch (Exception e) {
>           LOG.error(StringUtils.stringifyException(e));
>         }
>         try {
>           Thread.sleep(keyUpdaterInterval);
>         } catch (InterruptedException ie) {
>         }
>       }
>     }
>   }
> {code}

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