Hey-

I just manually configured zookeeper (I had been letting hbase do the managing) 
on 2 nodes (I know I should use an odd number of nodes but I didn't want to be 
in standalone mode and I only have 2 machines to play with right now) and when 
I start up hbase I get an interesting error message on one node:

2009-10-24 13:43:43,798 - WARN  [ProcessThread:-1:preprequestproces...@402] - 
Got exception when processing sessionid:0x124827089980006 type:create cxid:0x1d 
zxid:0xfffffffffffffffe txntype:unknown n/a
org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = 
NodeExists
      at 
org.apache.zookeeper.server.PrepRequestProcessor.pRequest(PrepRequestProcessor.java:245)
      at 
org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.java:114)

It repeats this every now and again... is this something I should be worrying 
about? Hbase still works fine

Mark Vigeant
RiskMetrics Group, Inc.

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