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https://issues.apache.org/jira/browse/HADOOP-2158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12549633
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Hadoop QA commented on HADOOP-2158:
-----------------------------------
+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12369007/2158.patch
against trunk revision r602270.
@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/1300/testReport/
Findbugs warnings:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1300/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1300/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1300/console
This message is automatically generated.
> hdfsListDirectory in libhdfs does not scale
> -------------------------------------------
>
> Key: HADOOP-2158
> URL: https://issues.apache.org/jira/browse/HADOOP-2158
> Project: Hadoop
> Issue Type: Bug
> Components: libhdfs
> Affects Versions: 0.15.0
> Reporter: Christian Kunz
> Assignee: Christian Kunz
> Priority: Blocker
> Fix For: 0.15.2
>
> Attachments: 2158.patch
>
>
> hdfsListDirectory makes one rpc call using deprecated
> fs.FileSystem.listPaths, and then two rpc calls for every entry in the
> returned array. When running a job with more than 3000 mappers each running a
> pipes application using libhdfs to scan a dfs directory with about 100-200
> entries, this results in about 1M rpc calls to the namenode server
> overwhelming it.
> hdfsListDirectory should call fs.FileSystem.listStatus instead.
> I will submit a patch.
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