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Junfan Zhang commented on OOZIE-3646: ------------------------------------- Got it [~dionusos]. Test case will be provided in next few days. > Possible dead-lock in SignalXCommand > ------------------------------------ > > Key: OOZIE-3646 > URL: https://issues.apache.org/jira/browse/OOZIE-3646 > Project: Oozie > Issue Type: Bug > Reporter: Junfan Zhang > Priority: Major > > The limited thread execution mechanism aims to solve the dead-lock when all > active threads are executing the SignalXCommand's invokeAll method. > h2. Dead-lock when to happen > Assuming that Oozie CallableQueue thread pool size is 120, when all threads > are executing the {{SignalXCommand.startForkedActions}} method, a deadlock > occurs. > Because in {{SignalXCommand.startForkedActions}}, the code of > {{List<Future<ActionExecutorContext>> futures = > Services.get().get(CallableQueueService.class) > .invokeAll(tasks);}} will be sync executed, however now > all callableQueue threads are busy. > h2. Solution > 1. Need to limit directly invokeAll call when the num of rest threads is less > than the tasks > 2. To obtain correct active threads number in callableQueue, the > SignalXCommand.class lock is needed. -- This message was sent by Atlassian Jira (v8.20.1#820001)