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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6460) Namenode runs of out of memory due to memory leak in ipc Server
Date Mon, 04 Jan 2010 18:56:04 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6460?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Chansler updated HADOOP-6460:
------------------------------------

    Release Note: If an IPC server response buffer has grown to than 1MB, it is replaced by
a smaller buffer to free up the Java heap that was used. This will improve the longevity of
the name service.  (was: The ipc server response buffers that have grown to a large size (more
than 1MB) is replaced by a smaller buffer to free up java heap used. This addresses the issue
of large growth in namenode java heap usage.)

> Namenode runs of out of memory due to memory leak in ipc Server
> ---------------------------------------------------------------
>
>                 Key: HADOOP-6460
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6460
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.20.1, 0.21.0, 0.22.0
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>            Priority: Blocker
>             Fix For: 0.20.2, 0.21.0, 0.22.0
>
>         Attachments: hadoop-6460.1.patch, hadoop-6460.5.patch, hadoop-6460.6.patch, hadoop-6460.7.patch,
hadoop-6460.patch, hadoop-6460.rel20.patch
>
>
> Namenode heap usage grows disproportional to the number objects supports (files, directories
and blocks). Based on heap dump analysis, this is due to large growth in ByteArrayOutputStream
allocated in o.a.h.ipc.Server.Handler.run().

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