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https://issues.apache.org/jira/browse/BOOKKEEPER-294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13294260#comment-13294260
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Flavio Junqueira commented on BOOKKEEPER-294:
---------------------------------------------

Right, I should have looked more carefully at the log excerpt, it is about 
bookies not clients. If the znode still exists, then the session from the 
previous instance of the bookie hasn't expired. I don't see a problem right now 
with just deleting the znode if it still exists.
                
> Not able to start the bookkeeper before the ZK session timeout.
> ---------------------------------------------------------------
>
>                 Key: BOOKKEEPER-294
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-294
>             Project: Bookkeeper
>          Issue Type: Bug
>            Reporter: Gopinathan A
>            Assignee: Rakesh R
>
> Not able to start the bookkeeper before the ZK session timeout.
> Here i killed the bookie and started again.
> {noformat}
> 2012-06-12 20:00:25,220 - INFO  [main:LedgerCache@65] - openFileLimit is 900, 
> pageSize is 8192, pageLimit is 456781
> 2012-06-12 20:00:25,238 - ERROR [main:Bookie@453] - ZK exception registering 
> ephemeral Znode for Bookie!
> org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = 
> NodeExists for /ledgers/available/10.18.40.216:3181
>       at org.apache.zookeeper.KeeperException.create(KeeperException.java:119)
>       at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
>       at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:778)
>       at org.apache.bookkeeper.bookie.Bookie.registerBookie(Bookie.java:450)
>       at org.apache.bookkeeper.bookie.Bookie.<init>(Bookie.java:348)
>       at org.apache.bookkeeper.proto.BookieServer.<init>(BookieServer.java:64)
>       at org.apache.bookkeeper.proto.BookieServer.main(BookieServer.java:249)
> {noformat}

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