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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1889) ZooKeeperInstance close method should mark instance closed.
Date Wed, 13 Nov 2013 20:53:21 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13821817#comment-13821817
] 

Sean Busbey commented on ACCUMULO-1889:
---------------------------------------

I can update the patch to account for that exception. Prefer it broken into its own block
(to make refactoring when we want to correctly handle InterruptedException easier) or change
the existing block to catch Exception (to make current code simpler)?

> ZooKeeperInstance close method should mark instance closed.
> -----------------------------------------------------------
>
>                 Key: ACCUMULO-1889
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1889
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.4.5, 1.5.1, 1.6.0
>            Reporter: Sean Busbey
>            Assignee: Sean Busbey
>             Fix For: 1.6.0
>
>         Attachments: ACCUMULO-1889.1.patch.txt
>
>
> (1.4.5 and 1.5.1 impact presumes ACCUMULO-1858 gets applied)
> The current close() implementation on ZooKeeperInstance only marks a given instance as
closed if the outstanding client count is 0.
> {code}
>   public synchronized void close() throws AccumuloException {
>     if (!closed && clientInstances.decrementAndGet() == 0) {
>       try {
>         zooCache.close();
>         ThriftUtil.close();
>       } catch (InterruptedException e) {
>         clientInstances.incrementAndGet();
>         throw new AccumuloException("Issues closing ZooKeeper.");
>       }
>       closed = true;
>     }
>   }
> {code}
> This is incorrect for two reason:
> 1) It allows continued operations on a given ZKI after it has had close() called on it
> 2) It allows a given ZKI to decrement the number of open clients more than once



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