Github user witgo commented on the issue: https://github.com/apache/spark/pull/15505 @squito My understanding is that the TaskSchedulerImpl class contains many synchronized statements (synchronized the methods). If a synchronized statements execution time is very long, it will block other synchronized statements, this causes reduced performance in the TaskSchedulerImpl instance.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org