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From "Patrick Hunt (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-3046) testManyChildWatchersAutoReset is flaky
Date Fri, 25 May 2018 23:49:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-3046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16491409#comment-16491409
] 

Patrick Hunt commented on ZOOKEEPER-3046:
-----------------------------------------

I checked job 37 above log artifacts and I don't see any "fsync" issues are you would typically
expect if the disk is slow. 

{noformat}
                if (syncElapsedMS > fsyncWarningThresholdMS) {
                    LOG.warn("fsync-ing the write ahead log in "
                            + Thread.currentThread().getName()
                            + " took " + syncElapsedMS
                            + "ms which will adversely effect operation latency. "
                            + "File size is " + channel.size() + " bytes. "
                            + "See the ZooKeeper troubleshooting guide");
                }
{noformat}

Do you see it in any of the failures you're looking at?

Perhaps we should turn on GC logging and include that in the artifact?

> testManyChildWatchersAutoReset is flaky
> ---------------------------------------
>
>                 Key: ZOOKEEPER-3046
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3046
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: tests
>    Affects Versions: 3.5.3, 3.4.12
>            Reporter: Bogdan Kanivets
>            Assignee: Bogdan Kanivets
>            Priority: Minor
>              Labels: flaky, pull-request-available
>             Fix For: 3.6.0, 3.4.13, 3.5.5
>
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> According to the [dashboard|https://builds.apache.org/job/ZooKeeper-Find-Flaky-Tests/lastSuccessfulBuild/artifact/report.html] testManyChildWatchersAutoReset
is flaky in 3.4 and 3.5
> [ZooKeeper_branch34_java10|https://builds.apache.org/job/ZooKeeper_branch34_java10//13]
> [ZooKeeper_branch35_java9|https://builds.apache.org/job/ZooKeeper_branch35_java9/253]
> Test times out and because of that ant doesn't capture any output.



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