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From "shanyu zhao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-10840) Fix OutOfMemoryError caused by metrics system in Azure File System
Date Thu, 17 Jul 2014 01:45:05 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-10840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

shanyu zhao updated HADOOP-10840:
---------------------------------

    Attachment: HADOOP-10840.2.patch

> Fix OutOfMemoryError caused by metrics system in Azure File System
> ------------------------------------------------------------------
>
>                 Key: HADOOP-10840
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10840
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: metrics
>    Affects Versions: 2.4.1
>            Reporter: shanyu zhao
>            Assignee: shanyu zhao
>         Attachments: HADOOP-10840.1.patch, HADOOP-10840.2.patch, HADOOP-10840.patch
>
>
> In Hadoop 2.x the Hadoop File System framework changed and no cache is implemented (refer
to HADOOP-6356). This means for every WASB access, a new NativeAzureFileSystem is created,
along which a Metrics source created and added to MetricsSystemImpl. Over time the sources
accumulated, eating memory and causing Java OutOfMemoryError.
> The fix is to utilize the unregisterSource() method added to MetricsSystem in HADOOP-10839.



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