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From Stack <st...@duboce.net>
Subject Re: HBase performance evaluation master not running problem.
Date Fri, 21 Jan 2011 18:20:39 GMT
When clients are > 1, then PE tries to run a mapreduce job to host the
loading clients.

Is it possible that the client out in MR task is trying to connect to
wrong location?  Perhaps the HBase conf dir is not available to the
running task?  Have you seen
http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/mapreduce/package-summary.html#package_description?
 Perhaps this will help?

St.Ack

On Fri, Jan 21, 2011 at 8:12 AM, Wojciech Langiewicz
<wlangiewicz@gmail.com> wrote:
> Hello
> I have problem with running HBase performance tests from
> org.apache.hadoop.hbase.PerformanceEvaluation package. I'm using version
> from CDH3,
> Tests are ok when argument nclients is 1, but in case of greater number,
> after mappers reaching 100% I get this exception (I didn't test all tests,
> but all of tested by me failed, 'scan' and 'randomRead' fail for sure):
>
> 11/01/21 17:05:19 INFO mapred.JobClient: Task Id :
> attempt_201101211442_0005_m_000000_0, Status : FAILED
> org.apache.hadoop.hbase.MasterNotRunningException
>        at
> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getMaster(HConnectionManager.java:416)
>        at
> org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:78)
>        at
> org.apache.hadoop.hbase.PerformanceEvaluation$Test.testSetup(PerformanceEvaluation.java:745)
>        at
> org.apache.hadoop.hbase.PerformanceEvaluation$Test.test(PerformanceEvaluation.java:764)
>        at
> org.apache.hadoop.hbase.PerformanceEvaluation.runOneClient(PerformanceEvaluation.java:1097)
>        at
> org.apache.hadoop.hbase.PerformanceEvaluation$EvaluationMapTask.map(PerformanceEvaluation.java:446)
>        at
> org.apache.hadoop.hbase.PerformanceEvaluation$EvaluationMapTask.map(PerformanceEvaluation.java:399)
>        at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
>        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:639)
>        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:315)
>        at org.apache.hadoop.mapred.Child$4.run(Child.java:217)
>        at java.security.AccessController.doPrivileged(Native Method)
>        at javax.security.auth.Subject.doAs(Subject.java:396)
>        at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1063)
>        at org.apache.hadoop.mapred.Child.main(Child.java:211)
>
> Do you have any ideas how to solve this?
>
> --
> Wojciech Langiewicz
>

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