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From "Jordan Zimmerman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CURATOR-110) LeaderLatch does not complete if it is started without a connection to ZooKeeper
Date Thu, 05 Jun 2014 13:05:02 GMT

    [ https://issues.apache.org/jira/browse/CURATOR-110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14018759#comment-14018759
] 

Jordan Zimmerman commented on CURATOR-110:
------------------------------------------

This change has exposed an interest race. TestLeaderLatch.testWaiting() is intermittently
failing because the initial CONNECTED state change can get processed after the initial reset()
causing the latch to throttle (i.e. show leader and not-leader in quick succession). It's
not really a bug but makes using it harder as the test shows.

> LeaderLatch does not complete if it is started without a connection to ZooKeeper
> --------------------------------------------------------------------------------
>
>                 Key: CURATOR-110
>                 URL: https://issues.apache.org/jira/browse/CURATOR-110
>             Project: Apache Curator
>          Issue Type: Bug
>          Components: Recipes
>    Affects Versions: 2.5.0
>            Reporter: Cameron McKenzie
>            Priority: Minor
>              Labels: connection, latch, leader
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> Given the following conditions:
> 1.) No connection is available to ZK
> 2.) A LeaderLatch is created and started
> 3.) All retries for the leader latch creating its ephemeral zNode have been exhausted.
> At this point the LeaderLatch will not begin functioning correctly when a connection
is established. This is due to it ignoring 'CONNECTED' connection state events (it only handles
RECONNECTED events).
> The fix should simply be a case of making the state handling for CONNECTED and RECONNECTED
the same.



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