This is a follow-up of issue #41492.

We have now deployed Spring Boot 3.3.2 in the affected environment and the original problem addressed in the issue above still exists even though the code change is in place: We get the NPE "because "firstHalf" is null" and the process exits but the original exception is not logged.

When running with -XX:ActiveProcessorCount=1 I have found an InterruptedException from kafka while processing some event. The stack trace does not fit, but I take the idea: What if an InterruptedException is thrown ThreadedOutcomesResolver.resolveOutcomes()? Then line 166 is hit and still a NPE can occur because this.outcomes is not initialized.

best regards
Jens