So i figured out the issue i was facing https://issues.apache.org/jira/browse/SOLR-9803
<updateHandler class="solr.DirectUpdateHandler2"> <updateLog> <str name="dir">${solr.ulog.dir:}</str> <int name="numVersionBuckets">${solr.ulog.numVersionBuckets:8388608}</int> </updateLog> i had a huge value set fir numVersioinBuckets which was causing memory leak as stated in issue 9803 Changing to default value solved my problem -- View this message in context: http://lucene.472066.n3.nabble.com/Overseer-session-expires-on-multiple-collection-creation-tp4331265p4333692.html Sent from the Solr - User mailing list archive at Nabble.com.