Problem: we are using the "Invoke Java" Operator on a Process Automation Agent. Basically, this is working fine. But unfortunately, only after a freh restart of the Process Automation Agent of the target node. A second attempt will fail with "Message could not be posted to the node"-error. After killing the agent and restarting it, it works fine again - for exactly a singe process execution.
Above error could be related to mismatching Java versions between the agent and the orchestrator. Please confirm matching Java versions. It because it is recommended that the JDK versions match up between the orchestrator and the agent. To check this run the following from the command line:
It's always a best practice to keep the Java versions between integrated systems identical.