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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7239) Verify protobuf serialization is correctly chunking upon read to avoid direct memory OOMs
Date Fri, 19 Apr 2013 06:13:19 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13636114#comment-13636114
] 

Hudson commented on HBASE-7239:
-------------------------------

Integrated in hbase-0.95-on-hadoop2 #74 (See [https://builds.apache.org/job/hbase-0.95-on-hadoop2/74/])
    HBASE-7239. Introduces chunked reading for large cellblocks (Revision 1469655)

     Result = FAILURE
ddas : 
Files : 
* /hbase/branches/0.95/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/HBaseClient.java
* /hbase/branches/0.95/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/IPCUtil.java

                
> 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
>            Assignee: Devaraj Das
>            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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