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Posted to common-issues@hadoop.apache.org by "shanyu zhao (JIRA)" <ji...@apache.org> on 2014/07/15 23:21:06 UTC

[jira] [Commented] (HADOOP-10840) Fix OutOfMemoryError caused by metrics system in Azure File System

    [ https://issues.apache.org/jira/browse/HADOOP-10840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14062663#comment-14062663 ] 

shanyu zhao commented on HADOOP-10840:
--------------------------------------

[~cnauroth] Could you please review this patch? Thx!

> 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.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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