RuiLi8080 opened a new pull request #3349: URL: https://github.com/apache/storm/pull/3349
## What is the purpose of the change We observed an NPE issue when making assignments in our cluster. Further we found that this is a race-condition between assignment sync-up and killing topology. This is to help prevent the NPE and memory leak by cleaning up again while the race-condition was noticed. Details: https://issues.apache.org/jira/browse/STORM-3713 ## How was the change tested Rebuild storm locally. ---------------------------------------------------------------- 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
