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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5016) Heartbeating thread blocks under some failure conditions leading to loss of datanodes
Date Thu, 25 Jul 2013 04:03:51 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13719203#comment-13719203
] 

Hadoop QA commented on HDFS-5016:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12594084/HDFS-5016.1.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}.  The javadoc tool did not generate any 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-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.server.blockmanagement.TestBlocksWithNotEnoughRacks

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/4729//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/4729//console

This message is automatically generated.
                
> Heartbeating thread blocks under some failure conditions leading to loss of datanodes
> -------------------------------------------------------------------------------------
>
>                 Key: HDFS-5016
>                 URL: https://issues.apache.org/jira/browse/HDFS-5016
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Devaraj Das
>            Assignee: Suresh Srinivas
>            Priority: Blocker
>             Fix For: 2.1.0-beta
>
>         Attachments: HDFS-5016.1.patch, HDFS-5016.patch, jstack1.txt
>
>
> In the testing of some failure scenarios for HBase MTTR, we have been simulating node
failures via firewalling of nodes (where all communication ports would be firewalled except
ssh's port). We have noticed that when a (data)node is firewalled, we lose certain other datanodes
- those that were involved in some communication with the firewalled node before the latter
was firewalled. Will attach jstack output from one of the lost datanodes. The heartbeating
thread seems to be locked up.
> This jira is to track a fix for the problem.

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