bharanic-dev commented on pull request #12930: URL: https://github.com/apache/pulsar/pull/12930#issuecomment-987149372
@pkumar-singh, please see: https://github.com/apache/pulsar/pull/12930#discussion_r758845818 the callback executor is single-threaded. Let's say there is some code like below: getTopicMetadata().thenAccept (x -> do_something(x)); do_something() gets executed in the executor thread. If do_something makes a blocking call to the metadata-store, the callback for that blocking call will never gets executed because the callback executor is blocked (waiting for do_something() to finish). The fix is to make sure that the callback executor doesn't get blocked. So, changing the "thenAccept" to "thenAccetpAsync", which makes the callback executor just schedule the callback to a different executor, the deadlock is avoided. Hope that explains the issue and the fix. -- 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. To unsubscribe, e-mail: commits-unsubscr...@pulsar.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
