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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-7239) Verify protobuf serialization is correctly chunking upon read to avoid direct memory OOMs
Date Thu, 18 Apr 2013 17:44:14 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7239?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Devaraj Das updated HBASE-7239:
-------------------------------

    Status: Patch Available  (was: Open)

Let's see what hadoopqa says.
                
> Verify protobuf serialization is correctly chunking upon read to avoid direct memory
OOMs
> -----------------------------------------------------------------------------------------
>
>                 Key: HBASE-7239
>                 URL: https://issues.apache.org/jira/browse/HBASE-7239
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Lars Hofhansl
>            Priority: Critical
>             Fix For: 0.95.1
>
>         Attachments: 7239-1.patch
>
>
> Result.readFields() used to read from the input stream in 8k chunks to avoid OOM issues
with direct memory.
> (Reading variable sized chunks into direct memory prevent the JVM from reusing the allocated
direct memory and direct memory is only collected during full GCs)
> This is just to verify protobufs parseFrom type methods do the right thing as well so
that we do not reintroduce this problem.

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