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Posted to issues@hbase.apache.org by "Anoop Sam John (JIRA)" <ji...@apache.org> on 2014/08/26 05:44:58 UTC
[jira] [Assigned] (HBASE-11816) Initializing custom Metrics
implementation failed in Mapper or Reducer
[ https://issues.apache.org/jira/browse/HBASE-11816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anoop Sam John reassigned HBASE-11816:
--------------------------------------
Assignee: Anoop Sam John (was: stack)
> Initializing custom Metrics implementation failed in Mapper or Reducer
> ----------------------------------------------------------------------
>
> Key: HBASE-11816
> URL: https://issues.apache.org/jira/browse/HBASE-11816
> Project: HBase
> Issue Type: Bug
> Components: metrics
> Reporter: Huafeng Wang
> Assignee: Anoop Sam John
> Priority: Minor
> Fix For: 0.99.0, 2.0.0, 0.98.6
>
> Attachments: hbase-11816.patch
>
>
> When I want to initialize a custom MetricsSource implementation which extends class BaseSourceImpl in Mapper or Reducer’s setup stage, an exception will be thrown:
> Error: org.apache.hadoop.metrics2.MetricsException: Metrics source JvmMetrics already exists!
> at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.newSourceName(DefaultMetricsSystem.java:126)
> at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.sourceName(DefaultMetricsSystem.java:107)
> at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:217)
> at org.apache.hadoop.metrics2.source.JvmMetrics.create(JvmMetrics.java:78)
> at org.apache.hadoop.hbase.metrics.BaseSourceImpl$DefaultMetricsSystemInitializer.init(BaseSourceImpl.java:51)
> at org.apache.hadoop.hbase.metrics.BaseSourceImpl.<init>(BaseSourceImpl.java:74)
> at org.apache.hadoop.hbase.mapreduce.IdentityTableReducer.setup(IdentityTableReducer.java:89)
> at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:168)
> at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:627)
> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:389)
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:167)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
> The bug is similar to https://issues.apache.org/jira/browse/MAPREDUCE-3976
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