massakam commented on issue #3630: Broker can not respond to client requests URL: https://github.com/apache/pulsar/issues/3630#issuecomment-467935631 1. A thread `pulsar-io-x-x` locks a `PersistentSubscription` object to add a consumer. 2. In order to add the consumer, it is necessary to refer to `max_consumers_per_topic` included in the policy of the namespace, and it is assumed that a thread `ForkJoinPool.commonPool-worker-x` is in charge of that. 3. However, suppose that thread `ForkJoinPool.commonPool-worker-x` tries to add another consumer to the same subscription of the same topic before the process 2. 4. 3 does not complete as the `PersistentSubscription` object is locked. 2 also does not complete as the thread `ForkJoinPool.commonPool-worker-x` remains blocked. What do you think about the above assumption?
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