Intermittent errors when creating sessions using SMC enabled client (Error ‘Unexpected Exception’)

Problem

It was seen intermittent errors when creating sessions using SMC enabled client. It fails to connect any of the clusters or the default silo cluster.  ‘Unexpected Exception’ msg was logged in client and API log.  After restarting the client, it works again.

In API log, below 'Unexpected Exception’ msg was logged:

2018-06-13 11:50:27.758 GMT Standard Time INFO [12788:8664] api.base.BaseMultiClusterConnection - Domain <SOAM>: IBM Spectrum Symphony multicluster workload placement settings are, Workload redirection : session, Workload redirection failover : disabled, Share values for task-level redirection : 5,3,2, Top N Clusters for task-level redirection: 3.
2018-06-13 11:50:27.758 GMT Standard Time INFO [12788:8664] api.base.BaseMultiClusterConnection - Domain <SOAM>: IBM Spectrum Symphony multicluster workload placement ranked cluster list: 1. **** 2. ***** .
2018-06-13 11:50:27.760 GMT Standard Time ERROR [12788:8664] api.base.BaseMultiClusterConnection - Unexpected Exception Caught {(0x80000001:1, 0, 1)@(SoamBaseMultiClusterConnection.cpp : 1187)}
2018-06-13 11:50:27.760 GMT Standard Time ERROR [12788:8664] api.base.BaseMultiClusterConnection - Unexpected Exception Caught {(0x80000001:1, 0, 1)@(SoamBaseMultiClusterConnection.cpp : 1187)}
2018-06-13 11:50:27.761 GMT Standard Time ERROR [12788:8664] api.base.BaseMultiClusterConnection - Domain <SOAM>: IBM Spectrum Symphony multicluster failed to connect to any of the ranked clusters for workload placement. {(0x86004f3e:1, 6, 20286)@(SoamBaseMultiClusterConnection.cpp : 1014)}