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From Jeevanandam Madanagopal <je...@myjeeva.com>
Subject KeeperException (NodeExists for /overseer): SolrCloud Multiple Collections - is it safe ignore these exceptions?
Date Thu, 18 Oct 2012 13:01:45 GMT
Hello -

While doing prototype of SolrCloud with Multiple Collection.  Each collection represents country
level data.
- searching within collection represents country level - local search
- searching across collection represents global search

Attached the graph image of SolrCoud structure.  For prototype I'm running Embedded ZooKeeper
ensemble (5 replicated zookeeper servers).
- Searching and Indexing in respective collection works well
- Search across collection works well (for global search)




While joining the 'Collection2' to zookeeper ensemble I noticed the following KeeperException
in the logger.

Question 'is it safe to ignore these exceptions?'

Exception Log snippet:
Oct 18, 2012 4:54:26 PM org.apache.zookeeper.server.NIOServerCnxn$Factory run
INFO: Accepted socket connection from /fe80:0:0:0:0:0:0:1%1:62700
Oct 18, 2012 4:54:26 PM org.apache.zookeeper.server.NIOServerCnxn readConnectRequest
INFO: Client attempting to establish new session at /fe80:0:0:0:0:0:0:1%1:62700
Oct 18, 2012 4:54:26 PM org.apache.zookeeper.server.NIOServerCnxn finishSessionInit
INFO: Established session 0x13a73521356000a with negotiated timeout 15000 for client /fe80:0:0:0:0:0:0:1%1:62700
Oct 18, 2012 4:54:26 PM org.apache.zookeeper.server.PrepRequestProcessor pRequest
INFO: Got user-level KeeperException when processing sessionid:0x13a73521356000a type:create
cxid:0x1 zxid:0xfffffffffffffffe txntype:unknown reqpath:n/a Error Path:/overseer Error:KeeperErrorCode
= NodeExists for /overseer
Oct 18, 2012 4:54:26 PM org.apache.zookeeper.server.PrepRequestProcessor pRequest
INFO: Got user-level KeeperException when processing sessionid:0x13a73521356000a type:create
cxid:0x2 zxid:0xfffffffffffffffe txntype:unknown reqpath:n/a Error Path:/overseer Error:KeeperErrorCode
= NodeExists for /overseer
Oct 18, 2012 4:54:26 PM org.apache.zookeeper.server.PrepRequestProcessor pRequest
INFO: Got user-level KeeperException when processing sessionid:0x13a73521356000a type:delete
cxid:0x4 zxid:0xfffffffffffffffe txntype:unknown reqpath:n/a Error Path:/live_nodes/mac-book-pro.local:7500_solr
Error:KeeperErrorCode = NoNode for /live_nodes/mac-book-pro.local:7500_solr
Oct 18, 2012 4:54:26 PM org.apache.solr.common.cloud.ZkStateReader$3 process
INFO: Updating live nodes

Cheers, Jeeva


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