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https://issues.apache.org/jira/browse/HADOOP-11361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsuyoshi Ozawa updated HADOOP-11361:
------------------------------------
          Resolution: Fixed
       Fix Version/s: 2.8.0
    Target Version/s: 2.8.0
        Hadoop Flags: Reviewed
              Status: Resolved  (was: Patch Available)

Committed this to trunk and branch-2. Thanks [~brahmareddy] for your reporting 
and contribution!

> Fix a race condition in MetricsSourceAdapter.updateJmxCache
> -----------------------------------------------------------
>
>                 Key: HADOOP-11361
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11361
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.4.1, 2.6.0, 2.5.1
>            Reporter: Brahma Reddy Battula
>            Assignee: Brahma Reddy Battula
>              Labels: BB2015-05-TBR
>             Fix For: 2.8.0
>
>         Attachments: HADOOP-111361-003.patch, HADOOP-11361-002.patch, 
> HADOOP-11361.patch, HDFS-7487.patch
>
>
> {noformat}
> Caused by: java.lang.NullPointerException
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.updateAttrCache(MetricsSourceAdapter.java:247)
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.updateJmxCache(MetricsSourceAdapter.java:177)
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getAttribute(MetricsSourceAdapter.java:102)
>       at 
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:647)
> {noformat}



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