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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17657) TestZKAsyncRegistry is flaky
Date Sat, 18 Feb 2017 13:18:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15873155#comment-15873155
] 

Duo Zhang commented on HBASE-17657:
-----------------------------------

As we are going to test ZKAsyncRegistry here, we should not rely on the result of it when
constructing the test? We should use other methods to detect if all the replicas for meta
region is ready.

> TestZKAsyncRegistry is flaky 
> -----------------------------
>
>                 Key: HBASE-17657
>                 URL: https://issues.apache.org/jira/browse/HBASE-17657
>             Project: HBase
>          Issue Type: Test
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>         Attachments: 17657.v1.txt
>
>
> TestZKAsyncRegistry showed up in failed tests several times.
> On https://builds.apache.org/job/HBASE-Find-Flaky-Tests/lastSuccessfulBuild/artifact/dashboard.html
, TestZKAsyncRegistry is reported flaky 33% of the time.
> e.g.
> https://builds.apache.org/job/PreCommit-HBASE-Build/5708/testReport/org.apache.hadoop.hbase.client/TestZKAsyncRegistry/test/
> Toward the end of test output:
> {code}
> 2017-02-14 20:23:20,779 WARN  [main-EventThread] client.ZKAsyncRegistry(198): Meta region
for replica 2 is in state PENDING_OPEN
> 2017-02-14 20:23:20,800 INFO  [98410feec74d:45445.activeMasterManager] hbase.MetaTableAccessor(1767):
Updated table hbase:meta state to ENABLED in META
> 2017-02-14 20:23:20,804 DEBUG [PostOpenDeployTasks:534574363] regionserver.HRegionServer(2034):
Finished post open deploy task for hbase:meta,,1_0001.534574363
> 2017-02-14 20:23:20,811 DEBUG [RS_OPEN_META-98410feec74d:50745-0] handler.OpenRegionHandler(126):
Opened hbase:meta,,1_0001.534574363 on 98410feec74d,50745,1487103793930
> {code}
> Looks like some replica of the hbase:meta table might not have finished opening by the
time the test asserted region location not being null.



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