Persisted job throws NPE on server restart

newbie2 — GMT

Hi all, I am using a wrapper class written over quartz 1.7.3 with jboss 5.1.0 GA. I use a simple trigger to store a JDBC job that fires every 5 minutes. This works fine as long as the server does not restart. After a restart, the job stored earlier throws the following exception Code:

2010-07-23 00:07:55,038 ERROR [org.quartz.core.JobRunShell] (Sched1_Worker-4) Job abcd.12 threw an unhandled Exception:
java.lang.NullPointerException
        at com.scheduler.QuratzJobImpl.execute(QuratzJobImpl.java:26)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
2010-07-23 00:07:55,038 ERROR [org.quartz.core.ErrorLogger] (Sched1_Worker-4) Job (abcd.12 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception. [See nested exception: java.lang.NullPointerException]
        at org.quartz.core.JobRunShell.run(JobRunShell.java:210)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
Caused by: java.lang.NullPointerException
        at com.scheduler.SCQuratzJobImpl.execute(QuratzJobImpl.java:26)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
        ... 1 more

Can anyone point out where the issue could be? Thanks!!

Re:Persisted job throws NPE on server restart

teck — GMT

It's really hard to tell what is going on without knowing what object/reference is null in your code. The best random guess I can come up with is that you're dealing a transient variable maybe and it is null when something gets deserialized and that maybe only happens on restart. That is a total guess though...

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