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https://issues.apache.org/jira/browse/HADOOP-11785?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin Patrick McCabe updated HADOOP-11785:
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Comment: was deleted
(was: Slight change to handle all exceptions in worker to handle occasional
unexpected non-io exceptions.
{color:green}+1 overall{color}.
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 4 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. There were no new javadoc warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 3.0.1) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
)
> Reduce number of listStatus operation in distcp buildListing()
> --------------------------------------------------------------
>
> Key: HADOOP-11785
> URL: https://issues.apache.org/jira/browse/HADOOP-11785
> Project: Hadoop Common
> Issue Type: Improvement
> Components: tools/distcp
> Affects Versions: 3.0.0
> Reporter: Zoran Dimitrijevic
> Assignee: Zoran Dimitrijevic
> Priority: Minor
> Fix For: 2.8.0
>
> Attachments: distcp-liststatus.patch, distcp-liststatus2.patch
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> Distcp was taking long time in copyListing.buildListing() for large source
> trees (I was using source of 1.5M files in a tree of about 50K directories).
> For input at s3 buildListing was taking more than one hour. I've noticed a
> performance bug in the current code which does listStatus twice for each
> directory which doubles number of RPCs in some cases (if most directories do
> not contain >1000 files).
>
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