NPE in Throttle Concurrent Builds Plugin kills the executor

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      Sometimes when the build node is stressed, the plugin terminates abnormally and kills the executor. Jenkins allows to restart the executor, and then the build process resumes as normal. Unfortunately, the stack trace below is the only evidence I have got:

      java.lang.NullPointerException
	at hudson.plugins.throttleconcurrents.ThrottleQueueTaskDispatcher.buildsOfProjectOnNode(ThrottleQueueTaskDispatcher.java:121)
	at hudson.plugins.throttleconcurrents.ThrottleQueueTaskDispatcher.canTake(ThrottleQueueTaskDispatcher.java:80)
	at hudson.model.queue.QueueTaskDispatcher.canTake(QueueTaskDispatcher.java:101)
	at hudson.model.Queue$JobOffer.canTake(Queue.java:214)
	at hudson.model.Queue.pop(Queue.java:799)
	at hudson.model.Executor.grabJob(Executor.java:276)
	at hudson.model.Executor.run(Executor.java:206)

            Assignee:
            Andrew Bayer
            Reporter:
            Sergei Ivanov
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              Created:
              Updated:
              Resolved: