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From "Yongjun Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11361) Fix a race condition in MetricsSourceAdapter.updateJmxCache
Date Tue, 05 Jul 2016 01:44:11 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15361883#comment-15361883
] 

Yongjun Zhang commented on HADOOP-11361:
----------------------------------------

Hi [~brahmareddy], Thank you and other folks for working on the issue here. Thanks [~ozawa]
for pointing me to this jira since I ran into the same issue and reported  HADOOP-13339. 

I have a comment here:

https://issues.apache.org/jira/browse/HADOOP-13339?focusedCommentId=15361880&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15361880

Wonder if it makes sense to you guys.

Thanks.


> 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, 2.5.1, 2.6.0
>            Reporter: Brahma Reddy Battula
>            Assignee: Brahma Reddy Battula
>         Attachments: HADOOP-111361-003.patch, HADOOP-11361-002.patch, HADOOP-11361-004.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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