Mahadev konar commented on ZOOKEEPER-202:

i had seen this problem with one of our users earlier and the problem had 
boiled down to some ptoblem at the leader wherein it got some error while 
processing the disconnect and didnt send out the disconnect to all the 
followers.. I think I had fixed it on Source forge. If possible you should take 
a look at the leaders log to see if you can find something,.

> 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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