It looks like the first format was removed in 3.6 as part of https://issues.apache.org/jira/browse/SOLR-1052. The second format works in all 3.x versions.
-Michael -----Original Message----- From: Peter Wolanin [mailto:peter.wola...@acquia.com] Sent: Friday, April 13, 2012 12:32 PM To: solr-user@lucene.apache.org Subject: mergePolicy element format change in 3.6 vs 3.5? Trying to maintain the Drupal integration module across multiple versions of 3.x, we've gotten a bug report suggesting that Solr 3.6 needs this change to solrconfig: - <mergePolicy>org.apache.lucene.index.LogByteSizeMergePolicy</mergePolicy> + <mergePolicy class="org.apache.lucene.index.LogByteSizeMergePolicy" /> I don't see this mentioned in the release notes - is the second format useable with 3.5, 3.4, etc?