Willadsens wrote:

Apparently, two concurrent transactions try to modify the
root object.

Correct, and very intentional.

Why? I'd suggest an architecture change that removes the root as a hotspot.

The current question is: semaphore or trap error and retry? Chris suggested a retry, and said the semaphore is not necessary.

If you need a semaphore for this, it doesn't need to be persistent. Just use a lok from Python's threading module...


Chris

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