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From "Cameron McKenzie (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CURATOR-329) SharedValue.start() method does not update to current value if version of value currently stored in zookeeper is 0 (zero)
Date Tue, 24 May 2016 22:54:12 GMT

     [ https://issues.apache.org/jira/browse/CURATOR-329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Cameron McKenzie resolved CURATOR-329.
--------------------------------------
       Resolution: Fixed
    Fix Version/s: 3.2.0
                   2.11.0

> SharedValue.start() method does not update to current value if version of value currently
stored in zookeeper is 0 (zero)
> -------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CURATOR-329
>                 URL: https://issues.apache.org/jira/browse/CURATOR-329
>             Project: Apache Curator
>          Issue Type: Bug
>          Components: Recipes
>    Affects Versions: 2.10.0
>            Reporter: Algirdas Rascius
>            Priority: Blocker
>             Fix For: 2.11.0, 3.2.0
>
>
> When zookeeper node stores value with version 0 and SharedCount instance is created and
started for this node, getCount() method returns seedValue passed to SharedCount constructor
instead of actual value stored in zookeeper node. This only happens when zookeeper node version
is 0 (zero).
> For example:
> {code}
> // Node /count does not exists before the test
> SharedCount count1 = new SharedCount(client, "/count", 10);
> SharedCount count2 = new SharedCount(client, "/count", 20);
> count1.start();
> count2.start();
> Assert.assertEquals(count1.getCount(), 10);
> Assert.assertEquals(count2.getCount(), 10); // Should return 10, but returns 20 instead
> {code}
> Issue arrises because when constructed class SharedValue initializes instance variable
currentValue with version 0 and does not update value in updateValue(..) method if version
returned by zookeeper is 0.



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