Hier im Übrigen die Stellungnahme des Supports, falls das noch jemanden betrifft:
"Unfortunately, without an agent trace (tcp=9) it's impossible to tell the root cause of this problem.
We can have just a suspicion and it seems this is related to a bug which is fixed in following AE versions:
Automation Engine 12.2.1 - planned release date: 2018-10-31
Automation Engine 12.3.0 - planned release date: 2019-06-28
Automation Engine 12.2.2 - planned release date: 2019-02-27
It's a synchronization problem between CCM and MAIN thread in job messenger, actually it doesn't have any effect on agent core.
1. Messenger MAIN thread initiate connection to agent.
2. After handshake, MAIN waits for EXDATA message in ccm_receive_message() function. Due to agent replies EXDATA very fast, MAIN can grab this message without going idle, meaning 1 wakeup signal remains in wake-up queue.
3. MAIN thread sends MELD message to agent and waits for QUITT again in ccm_receive_message() function.
4. Because there is still a wakeup signal in CCM, ccm_receive_message() returns immediately with empty queue result and messenger shuts down before it could send MELD message.
Therefore, we suggest upgrading your system to one of the versions mentioned above."
Bei uns wird die Lösung damit leider noch etwas dauern. Da wir uns an unserem Release-Management orientieren müssen, kommt Stand heute ein Einsatz erst ab 12.3.1 in Frage.