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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3482) hdfs balancer throws ArrayIndexOutOfBoundsException if option is specified without arguments
Date Fri, 01 Jun 2012 19:30:23 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13287615#comment-13287615
] 

Hadoop QA commented on HDFS-3482:
---------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12530528/HDFS-3482.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 javac.  The applied patch does not increase the total number of javac compiler warnings.

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

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +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 passed unit tests in hadoop-hdfs-project/hadoop-hdfs.

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/2569//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/2569//console

This message is automatically generated.
                
> hdfs balancer throws ArrayIndexOutOfBoundsException if option is specified without arguments
> --------------------------------------------------------------------------------------------
>
>                 Key: HDFS-3482
>                 URL: https://issues.apache.org/jira/browse/HDFS-3482
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer
>    Affects Versions: 2.0.0-alpha
>            Reporter: Stephen Chu
>            Assignee: madhukara phatak
>            Priority: Minor
>              Labels: newbie
>         Attachments: HDFS-3482.patch
>
>
> When running the hdfs balancer with an option but no argument, we run into an ArrayIndexOutOfBoundsException.
It's preferable to print the usage.
> {noformat}
> bash-3.2$ hdfs balancer -threshold
> Usage: java Balancer
>     [-policy <policy>]	the balancing policy: datanode or blockpool
>     [-threshold <threshold>]	Percentage of disk capacity
> Balancing took 261.0 milliseconds
> 12/05/31 09:38:46 ERROR balancer.Balancer: Exiting balancer due an exception
> java.lang.ArrayIndexOutOfBoundsException: 1
> 	at org.apache.hadoop.hdfs.server.balancer.Balancer$Cli.parse(Balancer.java:1505)
> 	at org.apache.hadoop.hdfs.server.balancer.Balancer$Cli.run(Balancer.java:1482)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> 	at org.apache.hadoop.hdfs.server.balancer.Balancer.main(Balancer.java:1555)
> bash-3.2$ hdfs balancer -policy
> Usage: java Balancer
>     [-policy <policy>]	the balancing policy: datanode or blockpool
>     [-threshold <threshold>]	Percentage of disk capacity
> Balancing took 261.0 milliseconds
> 12/05/31 09:39:03 ERROR balancer.Balancer: Exiting balancer due an exception
> java.lang.ArrayIndexOutOfBoundsException: 1
> 	at org.apache.hadoop.hdfs.server.balancer.Balancer$Cli.parse(Balancer.java:1520)
> 	at org.apache.hadoop.hdfs.server.balancer.Balancer$Cli.run(Balancer.java:1482)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> 	at org.apache.hadoop.hdfs.server.balancer.Balancer.main(Balancer.java:1555)
> {noformat}

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