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https://issues.apache.org/jira/browse/ZOOKEEPER-2152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15249301#comment-15249301
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Akihiro Suda commented on ZOOKEEPER-2152:
-----------------------------------------
I can 50% deterministically reproduce this issue.
When I hit this issue, the value of {{addrvec_hasnext(&zh->addrs_new)}} at
{{get_next_server_in_reconfig()}} is unexpectedly set to false:
https://github.com/apache/zookeeper/blob/539fd562/src/c/src/zookeeper.c#L1264
I also hit the following failures while repeating
{{Zookeeper_reconfig::testMigrationCycle}}:
* [{{/zookeeper/src/c/tests/TestReconfig.cc:154: Assertion: assertion failed
\[Expression:
false\]}}|https://github.com/apache/zookeeper/blob/539fd562/src/c/tests/TestReconfig.cc#L154]
* [{{/zookeeper/src/c/tests/TestReconfig.cc:183: Assertion: equality assertion
failed \[Expected: 1, Actual :
0\]}}|https://github.com/apache/zookeeper/blob/539fd562/src/c/tests/TestReconfig.cc#L183]
* [{{/zookeeper/src/c/tests/TestReconfig.cc:504: Assertion: equality assertion
failed \[Expected: 10.10.10.12:2012, Actual :
10.10.10.10:2010\]}}|https://github.com/apache/zookeeper/blob/539fd562/src/c/tests/TestReconfig.cc#L504]
> Intermittent failure in TestReconfig.cc
> ---------------------------------------
>
> Key: ZOOKEEPER-2152
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2152
> Project: ZooKeeper
> Issue Type: Sub-task
> Components: c client
> Reporter: Michi Mutsuzaki
> Labels: reconfiguration
> Fix For: 3.6.0
>
>
> I'm seeing this failure in the c client test once in a while:
> {noformat}
> [exec]
> /home/jenkins/jenkins-slave/workspace/ZooKeeper-trunk/trunk/src/c/tests/TestReconfig.cc:474:
> Assertion: assertion failed [Expression: found != string::npos,
> 10.10.10.4:2004 not in newComing list]
> {noformat}
> https://builds.apache.org/job/ZooKeeper-trunk/2640/console
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