MATLAB parallel pool startup takes forever when setting a network path as current folder

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yunhui zhou 2019-12-22

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https://ww2.mathworks.cn/matlabcentral/answers/497702-matlab-parallel-pool-startup-takes-forever-when-setting-a-network-path-as-current-folder

编辑： yunhui zhou 2019-12-22

Hello, I am using MATLAB R2019a (update 2 or 3) and R2018b (Update 5) currently. I find that when using MATLAB on Windows 10 and setting a windows shared folder on the network as current folder, starting the parallel pool usually (I would say 70% for R2019a, 20% for R2018b) takes forever (at least more than 120 min). No error message, zero CPU consumption, and the memory occupied by each individual MATLAB worker usually gets stucked at 290-310 MB. It happens in many different computers and laptops in my lab. Pressing "Ctrl+C" to abort the startup process and restart the parallel pool does not help. I hope to know the reason and solution for this phenomenon.

Pressing Ctrl+C during the startup process gives the following error output:

com.mathworks.mvm.exec.MvmCancellationException
	at com.mathworks.mvm.exec.FutureResult.getInternal(FutureResult.java:409)
	at com.mathworks.mvm.exec.FutureFevalResult.getInternal(FutureFevalResult.java:49)
	at com.mathworks.mvm.exec.FutureResult.get(FutureResult.java:262)
	at com.mathworks.toolbox.distcomp.util.mvm.Async$1.done(Async.java:51)
	at com.mathworks.mvm.exec.MvmSwingWorker$1$1.run(MvmSwingWorker.java:142)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)