Hi, I have got a searcher server replicating index from master server. Recently I have noticed the huge difference in the index size between master and slave followed by LockObtainFailedException in catalin.out log. When I debugged the searcher index folder, I could see more that 100 segement_N files in it. After debugging I found the root cause to be mis-configured solrconfig.xml, I was using solr3.4 and it had <indexConfig> section instead of main index and hence forth it was using simple file lock rather than the configured native lock( http://wiki.apache.org/solr/SolrConfigXml#indexConfig). Rectifying this cofiguration corrected the error and subsequently replication was fine and older segement files got deleted, finally synching the searcher core size and indexer core size.
What I would like to understand here is: 1. Why would it cause lock obtain time out with simple file lock ? (may be the defaul </writeLockTimeout> was too short). 2. What would happen in case of this LockObtainFailedException while repliation, will it fail to replicate the docs ? However I have observed the searcher has equal numfound doc as indexer, which mean clients searching wouldn't face any documents missing. 3. why did the index size bloat and older segment_N files were present? thanks in advance ! -- -JAME
