Benjamin Reed commented on ZOOKEEPER-202:

I think it's 2.1.0 from sourceforge. That release was done on 4/29/2008. (It 
might have been built earlier.)

The latest sourceforge release 2.2.1 has the fix.

> Phantom ephemeral node
> ----------------------
>                 Key: ZOOKEEPER-202
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-202
>             Project: Zookeeper
>          Issue Type: Bug
>            Reporter: Flavio Paiva Junqueira
> One of our users has observed that an ephemeral znode had gone away once its 
> creator had disconnected according to the leader, but one follower believed 
> that it existed long after the znode had been deleted. Apparently the 
> follower was never going to delete it. Because the leader wouldn't recognize 
> the znode as an existing one, any attempt to delete the znode failed.  We 
> have to investigate if this is related to any known bug, although, to my 
> knowledge, this is the first time it happens. It is important to note that 
> the user was running an older version of our code.

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