During validation, the WCC logs may show connection exceptions or errors like below: E190099 ### - Connection exception encountered. CAUAJM_E_00020 Local error in attempt to send request. RC=1. E190099 ### (monitoring id validation) - Connection exception encountered. CAUAJM_E_00020 Local error in attempt to send request. RC=1.
Application Server logs show that the connections from WCC server are getting established, but nothing more happens. It just shows connections established in a loop.
The /etc/hosts file on the affected WCC server was modified or reverted during the OS patching process, resulting in missing or incorrect entries. The WCC instance could not resolve the required application server hostnames (IP address, short name, and FQDN) to communicate with the environment, leading to connectivity failures.
/etc/hosts file of the functional WCC node with the /etc/hosts file on the problematic node./etc/hosts file on the problematic WCC node to include the missing entries for all application servers. Ensure that each entry contains the IP address, short name, and Fully Qualified Domain Name (FQDN).unisrvcntr stop CA-wcc-services unisrvcntr start CA-wcc-services