Manager logs show following message about "Key not available"
[ERROR] DM.InputProcessor_674: [20XX-XX-XX_00:00:26.070] Exception: Key not available for node SOME_AGENT.
com.ca.wa.publiclibrary.engine.library.crypto.CryptoException: Key not available for node SOME_AGENT.
Release : 12.x
Component : CA WORKLOAD AUTOMATION DE, WA Agent
These are WA Agents that have been installed but were not added to the CA Workload Automation Manager (e.g. DE). Or they were once part of managers, and were likely removed from manager side but agents were not shutdown or uninstalled.
Change these three settings from WARN or INFO to ALL
agent:afm (default WARN)
communications (default INFO)
dm:communications (default INFO)
The changes take effect immediately. Collect the logs for about an hour, then revert back to your previous or default logging. Get the IP addresses from tracelog and then connect to the host and shut them down if desired.
If all WA Agent user standard keys and ports, then add the Agents back to the Topology and then shut them down. This will stop them from constantly pinging the DE manager.
Note: Don't forget to remove them from theTopology after shutting the agents down.