The Bridge Mode is Client. the bridge server port set for 3998; which is defined as CICS agent port.
The lisa.mainframe.bridge.server.port needs to be set to port 3997 in local.properties to match the setting that is configured for the PortClient in the LPAR Agent.
Resolution
The bridge server port needs to be set to port 3997 which is the client port Change: lisa.mainframe.bridge.server.port=3997 in local.properties file