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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6229) Race condition in failover can cause RetryCache fail to work
Date Fri, 11 Apr 2014 01:17:15 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13966106#comment-13966106
] 

Hadoop QA commented on HDFS-6229:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12639639/HDFS-6229.000.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  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.

    {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
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-common-project/hadoop-common
hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.server.balancer.TestBalancerWithNodeGroup

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/6647//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/6647//console

This message is automatically generated.

> Race condition in failover can cause RetryCache fail to work
> ------------------------------------------------------------
>
>                 Key: HDFS-6229
>                 URL: https://issues.apache.org/jira/browse/HDFS-6229
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha
>    Affects Versions: 2.1.0-beta
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-6229.000.patch, retrycache-race.patch
>
>
> Currently when NN failover happens, the old SBN first sets its state to active, then
starts the active services (including tailing all the remaining editlog and building a complete
retry cache based on the editlog). If a retry request, which has already succeeded in the
old ANN (but the client fails to receive the response), comes in between, this retry may still
get served by the new ANN but miss the retry cache.



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