COMMON SERVICES: task showing errors in CCISSLGW

Products

• COMMON SERVICES FOR Z/OS

Issue/Introduction

The CCISSLGW task is running on the system and there are a lot of errors: 

...
CAS9855I Task 5 has connection from us-ss-stp-08(##.###.##.##.###):59518
CAS9899E Task 5 - Error: Invalid CTH header received
CAS9890E - Vers: 0  Cpu: 0
CAS9861I Task 5 closing us-ss-stp-08(##.###.##.##.###):59518.
CAS9861I Task 5 delivered 0 packets, 224 bytes.
CAS9855I Task 5 has connection from us-ss-stp-08(##.###.##.##.###):60382
CAS9899E Task 5 - Error: Invalid CTH header received
CAS9890E - Vers: 47  Cpu: 45
CAS9861I Task 5 closing us-ss-stp-08(##.###.##.##.###):60382.
CAS9861I Task 5 delivered 0 packets, 224 bytes.
CAS9855I Task 6 has connection from us-ss-stp-08(##.###.##.##.###):60386
CAS9899E Task 6 - Error: Invalid CTH header received
CAS9890E - Vers: 47  Cpu: 45

What is the issue with the task?

 

Environment

Common Services 15.0 - z/OS supported releases - 

Resolution

Those messages seem to indicate that something that was NOT CCI attempted to connect to these tasks.

There might be a "Port Sniffer" application running, or an application has been misconfigured using the CCI ports instead of its proper port.

The CCI tasks appear to be executing as expected.

This system should be identified (( us-ss-stp-08(##.###.##.##.###) )  and research what application is running on it that is attempting to connect to the CCI tasks.