LUCENE-1638: fix thread hazard when autoCommit=true and multiple threads are committing
LUCENE-1638: fix thread hazard when autoCommit=true and multiple threads are committing

git-svn-id: 4c5078813df38efa56971a28e09a55254294f104@775249 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr