now we have a problem with that issue. we havn't seen that warning since a long time, but since 2 days we get it again, and after the warning a cluster nodes jms did not work anymore. All clients loose their connection (node MessageDrivenBeans as well as remote clients)
this makes messaging unusable on that node and we have to restart the node.
Its now always at the same time when we are doing some batch jobs. Maybe this is a load/gc induced problem?