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https://issues.apache.org/jira/browse/HADOOP-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12561429#action_12561429
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Hadoop QA commented on HADOOP-2649:
-----------------------------------
+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12373724/configurableReplicationPeriod.patch
against trunk revision r614192.
@author +1. The patch does not contain any @author tags.
javadoc +1. The javadoc tool did not generate any warning messages.
javac +1. The applied patch does not generate any new compiler warnings.
findbugs +1. The patch does not introduce any new Findbugs warnings.
core tests +1. The patch passed core unit tests.
contrib tests +1. The patch passed contrib unit tests.
Test results:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1675/testReport/
Findbugs warnings:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1675/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1675/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1675/console
This message is automatically generated.
> The ReplicationMonitor sleep period should be configurable
> ----------------------------------------------------------
>
> Key: HADOOP-2649
> URL: https://issues.apache.org/jira/browse/HADOOP-2649
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Priority: Blocker
> Fix For: 0.16.0
>
> Attachments: configurableReplicationPeriod.patch,
> configurableReplicationPeriod.patch
>
>
> The HDFS Namenode computes replication work for datanodes once every 3
> seconds. This should be a configurable value. On large clusters, there could
> be many many blocks in the neededReplication queue and computing replication
> work for datanodes once every 3 seconds might consume lots of CPU on namenode.
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