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From "Xiaoyu Yao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-13159) Fix potential NPE in Metrics2 source for DecayRpcScheduler
Date Mon, 16 May 2016 19:40:12 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-13159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xiaoyu Yao updated HADOOP-13159:
--------------------------------
    Attachment: HADOOP-13159.00.patch

Attach a fix by changing the order of initialization.


> Fix potential NPE in Metrics2 source for DecayRpcScheduler
> ----------------------------------------------------------
>
>                 Key: HADOOP-13159
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13159
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 2.8.0
>            Reporter: Xiaoyu Yao
>            Assignee: Xiaoyu Yao
>         Attachments: HADOOP-13159.00.patch
>
>
> HADOOP-12985 introduced a few metrics2 counters for DecayRpcScheduler. The counters should
be initialized before the updater thread is created/executed. Otherwise, this is a chance
of NPE  if the updater thread get executed before the counters are fully initialized. I will
post a patch for it shortly. 



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