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