CTG5101E Handshake failure for IPIC connection from CICS® server server name response code= CICS response code , reason= reason [ numeric reason code ]
Explanation
The physical socket connection was established, but CICS JEE Inbound Resource Adapter rejected the connection.
System action
Any requests that were attempting to come from the CICS server server name will fail. Requests received after this point will also fail until a proper Handshake request is attempted by CICS.
User response
Check that the IPIC Communication configuration is correct at both CICS JEE Inbound Resource Adapter and CICS.