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From "Jordan Zimmerman (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (CURATOR-168) Background protected mode incorrectly sets Event name to just ZNode name. Should be full path.
Date Tue, 21 Apr 2015 01:17:59 GMT

     [ https://issues.apache.org/jira/browse/CURATOR-168?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jordan Zimmerman closed CURATOR-168.
------------------------------------
    Resolution: Fixed

> Background protected mode incorrectly sets Event name to just ZNode name. Should be full
path.
> ----------------------------------------------------------------------------------------------
>
>                 Key: CURATOR-168
>                 URL: https://issues.apache.org/jira/browse/CURATOR-168
>             Project: Apache Curator
>          Issue Type: Bug
>          Components: Recipes
>    Affects Versions: 2.7.0
>         Environment: operating system:ubuntu
>            Reporter: zhaogang
>            Priority: Blocker
>             Fix For: 2.7.2
>
>         Attachments: CURATOR-168.patch
>
>   Original Estimate: 168h
>  Remaining Estimate: 168h
>
> We use LeaderLatch for leader election within our several zookeeper clients,but sometimes
our leaderLatch stopped to work due to a error "Background exception was not retry-able or
retry gave up java.lang.IllegalArgumentException: Path must start with / characte".
> To found the reason we tracked the execution of program in class LeaderLatch with debug
mode,we found the code "setNode(event.getName());"  in line 487 of LeaderLatch.class in which
"event.getName()" code sometimes didn't return the full path of the znode but only return
the last part of the full path,like "_c_b1097329-4a77-493b-806c-5c888067eeab-latch-0000004068",
but the full path should be "/api1/leaders/_c_b1097329-4a77-493b-806c-5c888067eeab-latch-0000004068".
> So  the when event.getName()=="_c_b1097329-4a77-493b-806c-5c888067eeab-latch-0000004068",
the program will fail to go through the codes below:
> 1.LeaderLatch.checkLeadership()  line 526
> 2.ZKPaths.getNodeFromPath()      line 61
> 3.PathUtils.validatePath(path)        line 46
> And then the LeaderLatch stopped to work. 



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