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https://issues.apache.org/jira/browse/HDFS-5394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13816897#comment-13816897
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Hadoop QA commented on HDFS-5394:
---------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12612725/HDFS-5394.009.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 new
or modified test files.
{color:red}-1 javac{color}. The applied patch generated 1545 javac
compiler warnings (more than the trunk's current 1544 warnings).
{color:red}-1 javadoc{color}. The javadoc tool appears to have generated 1
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 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-HDFS-Build/5357//testReport/
Javac warnings:
https://builds.apache.org/job/PreCommit-HDFS-Build/5357//artifact/trunk/patchprocess/diffJavacWarnings.txt
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/5357//console
This message is automatically generated.
> fix race conditions in DN caching and uncaching
> -----------------------------------------------
>
> Key: HDFS-5394
> URL: https://issues.apache.org/jira/browse/HDFS-5394
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Affects Versions: 3.0.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-5394-caching.001.patch,
> HDFS-5394-caching.002.patch, HDFS-5394-caching.003.patch,
> HDFS-5394-caching.004.patch, HDFS-5394.005.patch, HDFS-5394.006.patch,
> HDFS-5394.007.patch, HDFS-5394.008.patch, HDFS-5394.009.patch
>
>
> The DN needs to handle situations where it is asked to cache the same replica
> more than once. (Currently, it can actually do two mmaps and mlocks.) It
> also needs to handle the situation where caching a replica is cancelled
> before said caching completes.
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