We are intermittently seeing the following error reported in the System Message Log for 1 server. During this time workstations see the ZCM login box rather than logging in. I have rebooted the server and this did resolve but now its showing again but also logged to other primaries.

This is ZCM 10.3.1 against a Oracle DB with 3 primaries and 1 sat.

The assignment web service encountered the following exception while handling "getEffectiveAssignments" request for 15e661f623bf041e4abfb776ecc923bc~00a91b0ca090de11a cbd0013723febf9: javax.naming.CommunicationException: connection closed [Root exception is java.io.IOException: connection closed]; remaining name ''