gabrywu commented on issue #2020: [QUESTION] Reslove InterProcessMutex.acquire() hang URL: https://github.com/apache/incubator-dolphinscheduler/issues/2020#issuecomment-594993325 I may find the reason: https://github.com/apache/curator/pull/297 > Fixes race in many Curator recipes whereby a pattern was used that called "notifyAll" in a synchronized block in response to a ZooKeeper watcher callback. This created a race and possible deadlock if the recipe instance was already in a synchronized block. This would result in the ZK event thread getting blocked which would prevent ZK connections from getting repaired. This change adds a new executor (available from CuratorFramework) that can be used to do the sync/notify so that ZK's event thread is not blocked.
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