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https://issues.apache.org/jira/browse/ZOOKEEPER-1394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15617726#comment-15617726
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wu wen commented on ZOOKEEPER-1394:
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Hi [~fpj], I start to agree that this is not a problem, the problem is that the
application does not have a graceful shutdown.
i think zookeeper client should be closed before application shutdown, rather
than rely on shutdownhook.
Does this issue need to be closed?
> ClassNotFoundException on shutdown of client
> --------------------------------------------
>
> Key: ZOOKEEPER-1394
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1394
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.4.2
> Environment: OS X 10.7 java version "1.6.0_29"
> Reporter: Herman Meerlo
> Assignee: wu wen
> Priority: Minor
> Attachments: ZOOKEEPER-1394.patch
>
>
> When close() is called on the ZooKeeper instance from a ContextListener
> (contextDestroyed) there is no way to synchronize with the fact that the
> EventThread and SendThread have actually finished their work. The problem
> lies in the SendThread which makes a call to ZooTrace when it exits, but that
> class has not been loaded yet. Because the ContextListener could not
> synchronize with the death of the threads the classloader has already
> disappeared, resulting in a ClassNotFoundException.
> My personal opinion is that the close() method should probably wait until the
> event and send thread have actually died.
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