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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4304) Make FSEditLogOp.MAX_OP_SIZE configurable
Date Sat, 23 Feb 2013 14:06:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13585123#comment-13585123
] 

Hudson commented on HDFS-4304:
------------------------------

Integrated in Hadoop-Mapreduce-trunk #1353 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1353/])
    HDFS-4304. Make FSEditLogOp.MAX_OP_SIZE configurable. Contributed by Colin Patrick McCabe.
(Revision 1449218)

     Result = SUCCESS
atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1449218
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/main/java/org/apache/hadoop/contrib/bkjournal/BookKeeperEditLogInputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EditLogBackupInputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EditLogFileInputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EditLogInputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogOp.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/RedundantEditLogInputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestEditLog.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeRecovery.java

                
> Make FSEditLogOp.MAX_OP_SIZE configurable
> -----------------------------------------
>
>                 Key: HDFS-4304
>                 URL: https://issues.apache.org/jira/browse/HDFS-4304
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 3.0.0, 2.0.3-alpha
>            Reporter: Todd Lipcon
>            Assignee: Colin Patrick McCabe
>             Fix For: 2.0.4-beta
>
>         Attachments: HDFS-4304.001.patch, HDFS-4304.002.patch, HDFS-4304.003.patch, HDFS-4304.004.patch,
HDFS-4304.005.patch
>
>
> Today we ran into an issue where a NN had logged a very large op, greater than the 1.5MB
MAX_OP_SIZE constant. In order to successfully load the edits, we had to patch with a larger
constant. This constant should be configurable so that we wouldn't have to recompile in these
odd cases. Additionally, I think the default should be bumped a bit higher, since it's only
a safeguard against OOME, and people tend to run NNs with multi-GB heaps.

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