[MM3-users] Re: Race condition when mass subscribing same email addresses to two lists?

Stephen J. Turnbull wrote:

I guess we should catch the error and retry. Raising and handling exceptions in Python is relatively slow, so even in your well constructed worst case, this shouldn't happen on every address, so I don't think having a separate queue or putting the whole thing in a transaction would be better. If you still have the log, I'd be curious to know how many unique errors you got. I need to do other work for the next 48 hours, but a patch would be very welcome. I don't know offhand where this code lives, sorry. Steve

For this case, there are 837 unique errors. Verified with the number of members of the two lists: 576 & 587 576 + 587 + 837 = 1000 * 2