Jun 25, 2015 5:38:00 PM hudson.triggers.Trigger$Cron doRun
WARNING: Cron thread throw an exception
java.lang.NullPointerException
        at hudson.model.Descriptor.toMap(Descriptor.java:880)
        at hudson.util.DescribableList.toMap(DescribableList.java:151)
        at hudson.model.AbstractProject.getTriggers(AbstractProject.java:1615)
        at hudson.triggers.Trigger.checkTriggers(Trigger.java:259)
        at hudson.triggers.Trigger$Cron.doRun(Trigger.java:215)
        at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:51)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)