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https://issues.apache.org/jira/browse/HADOOP-3184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12602955#action_12602955
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Hadoop QA commented on HADOOP-3184:
-----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12383534/3184.2.patch
against trunk revision 663841.
+1 @author. The patch does not contain any @author tags.
-1 tests included. The patch doesn't appear to include any new or modified
tests.
Please justify why no tests are needed for this patch.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
-1 core tests. The patch failed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2602/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2602/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2602/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2602/console
This message is automatically generated.
> HOD gracefully exclude "bad" nodes during ring formation
> --------------------------------------------------------
>
> Key: HADOOP-3184
> URL: https://issues.apache.org/jira/browse/HADOOP-3184
> Project: Hadoop Core
> Issue Type: Improvement
> Components: contrib/hod
> Reporter: Marco Nicosia
> Assignee: Hemanth Yamijala
> Fix For: 0.18.0
>
> Attachments: 3184.1.patch, 3184.2.patch
>
>
> HOD clusters sometimes fail to allocate due to a single "bad" node. During
> ring formation, the entire ring should not be dependent upon every single
> node being good. Instead, it should either exclude any ring member that does
> not adequately join the ring in a specified amount of time.
> This is a frequent HOD user issue (although not directly caused by HOD).
> Examples of bad nodes: Missing java, incorrect version of HOD or Hadoop,
> local name-cache corrupt, slow network links, drives just beginning to fail,
> etc.
> Many of these conditions are known, and we can monitor for those separately,
> but this enhancement would shield users from unknown failure conditions that
> we haven't yet anticipated. This way, a user will get a cluster, instead of
> hanging indefinitely.
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