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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3482) hdfs balancer throws ArrayIndexOutOfBoundsException if option is specified without arguments
Date Fri, 01 Jun 2012 17:07:23 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aaron T. Myers updated HDFS-3482:
---------------------------------

    Status: Patch Available  (was: Open)

Madhukara, after you submit a patch you need to hit the "submit patch" button to mark it patch
available so that the automated tests run. I've just gone ahead and done that for you.
                
> 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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