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https://issues.apache.org/jira/browse/HDFS-1295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13003810#comment-13003810
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Hadoop QA commented on HDFS-1295:
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-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12472903/IBR_shortcut_v2a.patch
against trunk revision 1079069.
+1 @author. The patch does not contain any @author tags.
-1 tests included. The patch doesn't appear to include any new or modified
tests.
Please justify why no new tests are needed for this
patch.
Also please list what manual steps were performed to
verify this patch.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
-1 core tests. The patch failed these core unit tests:
org.apache.hadoop.hdfs.server.balancer.TestBalancer
org.apache.hadoop.hdfs.server.datanode.TestBlockReplacement
org.apache.hadoop.hdfs.server.namenode.TestBlocksWithNotEnoughRacks
org.apache.hadoop.hdfs.server.namenode.TestBlockTokenWithDFS
org.apache.hadoop.hdfs.server.namenode.TestNodeCount
org.apache.hadoop.hdfs.TestDatanodeBlockScanner
-1 contrib tests. The patch failed contrib unit tests.
+1 system test framework. The patch passed system test framework compile.
Test results:
https://hudson.apache.org/hudson/job/PreCommit-HDFS-Build/239//testReport/
Findbugs warnings:
https://hudson.apache.org/hudson/job/PreCommit-HDFS-Build/239//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
https://hudson.apache.org/hudson/job/PreCommit-HDFS-Build/239//console
This message is automatically generated.
> Improve namenode restart times by short-circuiting the first block reports
> from datanodes
> -----------------------------------------------------------------------------------------
>
> Key: HDFS-1295
> URL: https://issues.apache.org/jira/browse/HDFS-1295
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Fix For: 0.23.0
>
> Attachments: IBR_shortcut_v2a.patch, shortCircuitBlockReport_1.txt
>
>
> The namenode restart is dominated by the performance of processing block
> reports. On a 2000 node cluster with 90 million blocks, block report
> processing takes 30 to 40 minutes. The namenode "diffs" the contents of the
> incoming block report with the contents of the blocks map, and then applies
> these diffs to the blocksMap, but in reality there is no need to compute the
> "diff" because this is the first block report from the datanode.
> This code change improves block report processing time by 300%.
--
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