Report exception: too many close count

[Markus Jelsma <ma...@openindex.io>]

Hi,

I stumbled upon SOLR-4037 again and this time restarting with a clean Zookeeper gave a very interesting error log:

2012-11-16 11:05:51,876 INFO [solr.core.SolrCore] - [Thread-4] - : Closing SolrCoreState
2012-11-16 11:05:51,876 INFO [solr.update.DefaultSolrCoreState] - [Thread-4] - : SolrCoreState ref count has reached 0 - closing IndexWriter
2012-11-16 11:05:51,876 INFO [solr.update.DefaultSolrCoreState] - [Thread-4] - : closing IndexWriter with IndexWriterCloser
2012-11-16 11:05:51,876 ERROR [solr.update.TransactionLog] - [Thread-4] - : Error: Forcing close of tlog{file=/opt/solr/cores/shard_d/data/tlog/tlog.0000000000000000063 refcount=1}
2012-11-16 11:05:51,877 INFO [solr.core.SolrCore] - [Thread-4] - : [openindex_d] Closing main searcher on request.
2012-11-16 11:05:51,881 INFO [solr.core.CachingDirectoryFactory] - [Thread-4] - : Releasing directory:/opt/solr/cores/shard_d/data/index
2012-11-16 11:05:51,881 ERROR [solr.core.SolrCore] - [Thread-4] - : Too many close [count:-1] on org.apache.solr.core.SolrCore@5f4f5a31. Please report this exception to solr-user@lucene.apache.org
2012-11-16 11:05:53,007 INFO [apache.zookeeper.ClientCnxn] - [main-SendThread(zk2:2181)] - : Opening socket connection to server rot1.nl.prx.openindex.io/178.21.118.184:2181
2012-11-16 11:05:53,114 INFO [apache.zookeeper.ClientCnxn] - [main-EventThread] - : EventThread shut down
2012-11-16 11:05:53,114 INFO [apache.zookeeper.ZooKeeper] - [Thread-4] - : Session: 0x13b03f0fcc00016 closed

A stack trace is missing.