Ansible Automation Platform 2.5 jobs fail with "The running ansible process received a shutdown signal" due to system hangs from audit backlog limit and security agent activity

Issue

Following an upgrade to AAP 2.5, multiple scheduled and ad-hoc jobs fail concurrently with one or more of the following symptoms:

• Job Errors:

  • The running ansible process received a shutdown signal.
  • Worker did not produce events or streaming was aborted, check execution node health.
  • Job reaped due to instance shutdown.

• UI/Platform Symptoms:

  • Automation Controller nodes intermittently toggle between Available and Unavailable in the Web UI.
  • Intermittent 503 Service Unavailable or 403 Forbidden errors when accessing the platform.
  • Database connection errors in tower.log: psycopg.OperationalError: connection failed: server closed the connection unexpectedly.

• System Logs:

  • /var/log/messages or the serial console shows: audit: backlog limit exceeded.
  • High CPU load spikes and frozen system behavior for 60+ seconds.