zookeeper-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2803) Flaky test: org.apache.zookeeper.test.CnxManagerTest.testWorkerThreads
Date Thu, 08 Jun 2017 23:01:18 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16043588#comment-16043588

Hadoop QA commented on ZOOKEEPER-2803:

-1 overall.  GitHub Pull Request  Build

    +1 @author.  The patch does not contain any @author tags.

    +0 tests included.  The patch appears to be a documentation patch that doesn't require

    -1 javadoc.  The javadoc tool appears to have generated 1 warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    -1 findbugs.  The patch appears to introduce 48 new Findbugs (version 3.0.1) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    +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-github-pr-build/781//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/781//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/781//console

This message is automatically generated.

> Flaky test: org.apache.zookeeper.test.CnxManagerTest.testWorkerThreads
> ----------------------------------------------------------------------
>                 Key: ZOOKEEPER-2803
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2803
>             Project: ZooKeeper
>          Issue Type: Bug
>    Affects Versions: 3.4.10
>            Reporter: Abraham Fine
>            Assignee: Abraham Fine
> We have noticed on internal executions of the integration tests rare failures of org.apache.zookeeper.test.CnxManagerTest.testWorkerThreads.
> {code}
> java.lang.RuntimeException: Unable to run quorum server 
> 	at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:565)
> 	at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:520)
> 	at org.apache.zookeeper.test.CnxManagerTest.testWorkerThreads(CnxManagerTest.java:328)
> 	at org.apache.zookeeper.JUnit4ZKTestRunner$LoggedInvokeMethod.evaluate(JUnit4ZKTestRunner.java:52)
> Caused by: java.io.IOException: The current epoch, 0, is older than the last zxid, 4294967296
> 	at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:546)
> {code}
> along with this strange stack trace in the logs:
> {code}
> java.nio.channels.ClosedByInterruptException
> 	at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:202)
> 	at sun.nio.ch.FileChannelImpl.force(FileChannelImpl.java:380)
> 	at org.apache.zookeeper.common.AtomicFileOutputStream.close(AtomicFileOutputStream.java:71)
> 	at org.apache.zookeeper.server.quorum.QuorumPeer.writeLongToFile(QuorumPeer.java:1232)
> 	at org.apache.zookeeper.server.quorum.QuorumPeer.setCurrentEpoch(QuorumPeer.java:1253)
> 	at org.apache.zookeeper.server.quorum.Learner.syncWithLeader(Learner.java:412)
> 	at org.apache.zookeeper.server.quorum.Follower.followLeader(Follower.java:83)
> 	at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:851)
> {code}
> It appears that this failure is related to the usage of {{((FileOutputStream) out).getChannel().force(true)}}
in {{AtomicFileOutputStream}}. {{FileChannel#force}} appears to be interruptible, which is
not desirable behavior when writing the epoch file. The interrupt may be triggered by the
repeated starting and shutting down of quorum peers in {{testWorkerThreads}}. Branch 3.5 uses
{{FileDescriptor#sync}} which is not interruptible and does not appear to have the same problem.
> I was able to find another JIRA ticket describing a similar issue here: https://issues.apache.org/jira/browse/DERBY-4963
> There is also interesting discussion in ZOOKEEPER-1835 (where the change was made for
3.5) although these discussions appear to be Windows centric (we noticed the issue on Linux)
> The failure appears to have popped up on "ZOOKEEPER-2297 PreCommit Build #3241" but jenkins
cleared out the logs (I only still have the test report from the mailing list).
> In addition, {{testWorkerThreads}} appears to be failing every few months on Solaris
on Apache Jenkins (for 3.4 ZooKeeper_branch34_solaris - Build # 1430  and 3.5 ZooKeeper_branch35_solaris
- Build # 387), but at the time I wrote this Jenkins had cleaned out the logs from the latest
failed run so I have no way of determining if the cause is the same.

This message was sent by Atlassian JIRA

View raw message