boyuanzz commented on pull request #12241: URL: https://github.com/apache/beam/pull/12241#issuecomment-658295343
> > Could you please explain more about the race condition here? > > threadsafe_watermark_estimator can become None in the finally block after the `if threadsafe_restriction_tracker:` check has passed in `try_split` which will lead to a `NoneType doesn't have a get_estimator_state method` error. Thanks. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
