JGroup JDBC_PING is not clearing the crashed members ---------------------------------------------------- Key: JGRP-2245 URL: https://issues.jboss.org/browse/JGRP-2245 Project: JGroups Issue Type: Bug Affects Versions: 4.0.8 Reporter: Sibin Karnavar Assignee: Bela Ban Fix For: 4.0.10 1) In AWS cloud environments, IP address will be different when a node crashes and when a new cluster node gets recreated. 2) In this situation, JGroup is not clearing logical_addr_cache and it gets confused, when we restart the cluster nodes. 3)logical_addr_cache_max_size and the eviction did not work because, the cache is again getting updated from the ping and it never getting marked as removable. I think the issue is handleView method is always re writing the entire cache on view change to the db. So even if we clear the table with the help of above mentioned flags (remove_all_data_on_view_change && remove_old_coords_on_view_change) , its getting re written to the table. {code:java} // remove all files which are not from the current members protected void handleView(View new_view, View old_view, boolean coord_changed) { if(is_coord) { if(coord_changed) { if(remove_all_data_on_view_change) removeAll(cluster_name); else if(remove_old_coords_on_view_change) { Address old_coord=old_view != null? old_view.getCreator() : null; if(old_coord != null) remove(cluster_name, old_coord); } } if(coord_changed || View.diff(old_view, new_view)[1].length > 0) { writeAll(); if(remove_all_data_on_view_change || remove_old_coords_on_view_change) startInfoWriter(); } } else if(coord_changed) // I'm no longer the coordinator remove(cluster_name, local_addr); } {code} 4) Because of the crashed members (non existing ip address), we are getting lot of socket timeouts sendToMembers of TP is trying to send messages to old crashed members and writing error logs while startup.