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https://issues.apache.org/jira/browse/ZOOKEEPER-2464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15361833#comment-15361833
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Hadoop QA commented on ZOOKEEPER-2464:
--------------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12816094/ZOOKEEPER-2464.patch
against trunk revision 1750739.
+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 new tests are needed for this
patch.
Also please list what manual steps were performed to
verify 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 (version 2.0.3)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-Build/3261//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-Build/3261//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-Build/3261//console
This message is automatically generated.
> NullPointerException on ContainerManager
> ----------------------------------------
>
> Key: ZOOKEEPER-2464
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2464
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.5.1
> Reporter: Stefano Salmaso
> Assignee: Jordan Zimmerman
> Attachments: ZOOKEEPER-2464.patch
>
>
> I would like to expose you to a problem that we are experiencing.
> We are using a cluster of 7 zookeeper and we use them to implement a
> distributed lock using Curator
> (http://curator.apache.org/curator-recipes/shared-reentrant-lock.html)
> So .. we tried to play with the servers to see if everything worked properly
> and we stopped and start servers to see that the system worked well
> (like stop 03, stop 05, stop 06, start 05, start 06, start 03)
> We saw a strange behavior.
> The number of znodes grew up without stopping (normally we had 4000 or 5000,
> we got to 60,000 and then we stopped our application)
> In zookeeeper logs I saw this (on leader only, one every minute)
> 2016-07-04 14:53:50,302 [myid:7] - ERROR
> [ContainerManagerTask:ContainerManager$1@84] - Error checking containers
> java.lang.NullPointerException
> at
> org.apache.zookeeper.server.ContainerManager.getCandidates(ContainerManager.java:151)
> at
> org.apache.zookeeper.server.ContainerManager.checkContainers(ContainerManager.java:111)
> at
> org.apache.zookeeper.server.ContainerManager$1.run(ContainerManager.java:78)
> at java.util.TimerThread.mainLoop(Timer.java:555)
> at java.util.TimerThread.run(Timer.java:505)
> We have not yet deleted the data ... so the problem can be reproduced on our
> servers
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