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Posted to solr-commits@lucene.apache.org by Apache Wiki <wi...@apache.org> on 2009/09/30 02:45:41 UTC

[Solr Wiki] Update of "FAQ" by HossMan

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The "FAQ" page has been changed by HossMan:
http://wiki.apache.org/solr/FAQ?action=diff&rev1=60&rev2=61

  
  This might also be caused by starting two Solr instances on the same port and killing one, see [[http://issues.apache.org/jira/browse/SOLR-118#action_12507990|Hoss's comment]] in SOLR-118. 
  
+ == What does "CorruptIndexException: Unknown format version" mean ? ==
+ 
+ This happens when the Lucene code in Solr used to read the index files from disk encounters index files in a format it doesn't recognize.  
+ 
+ The most common cause is from using a version of Solr+Lucene that is older then the version used to create that index.
+ 
  = Searching =
  
  == How to make the search use AND semantics by default rather than OR? ==