In my understanding, it could be you have job1 and job2. The task running
in job1 tries to update content for job2. Then, there could be a race
condition happening here that job2 is not scheduled.

If that's the case, I suggest you can put key-value store at workflow level
since this is cross-job operation.

Best,

Junkai

On Fri, Nov 9, 2018 at 11:45 AM DImuthu Upeksha <dimuthu.upeks...@gmail.com>
wrote:

> Hi Junkai,
>
> This method is being called inside a running task. And it is working for
> most of the time. I only saw this in 2 occasions for last few months and
> both of them happened today and yesterday.
>
> Thanks
> Dimuthu
>
> On Fri, Nov 9, 2018 at 2:40 PM Xue Junkai <junkai....@gmail.com> wrote:
>
> > User content store node will be created one the job has been scheduled.
> In
> > your case, I think the job is not scheduled. This method usually has been
> > utilized in running task.
> >
> > Best,
> >
> > Junkai
> >
> > On Fri, Nov 9, 2018 at 8:19 AM DImuthu Upeksha <
> dimuthu.upeks...@gmail.com
> > >
> > wrote:
> >
> > > Hi Helix Folks,
> > >
> > > I'm having this sporadic issue in some tasks of our workflows when we
> try
> > > to store a value in the workflow context and I have added both code
> > section
> > > and error message below. Do you have an idea what's causing this?
> Please
> > > let me know if you need further information. We are using Helix 0.8.2
> > >
> > > public void sendNextJob(String jobId) {
> > >     putUserContent(WORKFLOW_STARTED, "TRUE", Scope.WORKFLOW);
> > >     if (jobId != null) {
> > >         putUserContent(NEXT_JOB, jobId, Scope.WORKFLOW);
> > >     }
> > > }
> > >
> > > Failed to setup environment of task
> > > TASK_55096de4-2cb6-4b09-84fd-7fdddba93435
> > > java.lang.NullPointerException: null
> > >         at org.apache.helix.task.TaskUtil$1.update(TaskUtil.java:358)
> > >         at org.apache.helix.task.TaskUtil$1.update(TaskUtil.java:356)
> > >         at
> > >
> > >
> >
> org.apache.helix.manager.zk.HelixGroupCommit.commit(HelixGroupCommit.java:126)
> > >         at
> > >
> > >
> >
> org.apache.helix.manager.zk.ZkCacheBaseDataAccessor.update(ZkCacheBaseDataAccessor.java:306)
> > >         at
> > >
> > >
> >
> org.apache.helix.store.zk.AutoFallbackPropertyStore.update(AutoFallbackPropertyStore.java:61)
> > >         at
> > >
> >
> org.apache.helix.task.TaskUtil.addWorkflowJobUserContent(TaskUtil.java:356)
> > >         at
> > >
> > >
> >
> org.apache.helix.task.UserContentStore.putUserContent(UserContentStore.java:78)
> > >         at
> > >
> > >
> >
> org.apache.airavata.helix.core.AbstractTask.sendNextJob(AbstractTask.java:136)
> > >         at
> org.apache.airavata.helix.core.OutPort.invoke(OutPort.java:42)
> > >         at
> > >
> > >
> >
> org.apache.airavata.helix.core.AbstractTask.onSuccess(AbstractTask.java:123)
> > >         at
> > >
> > >
> >
> org.apache.airavata.helix.impl.task.AiravataTask.onSuccess(AiravataTask.java:97)
> > >         at
> > >
> > >
> >
> org.apache.airavata.helix.impl.task.env.EnvSetupTask.onRun(EnvSetupTask.java:52)
> > >         at
> > >
> > >
> >
> org.apache.airavata.helix.impl.task.AiravataTask.onRun(AiravataTask.java:349)
> > >         at
> > > org.apache.airavata.helix.core.AbstractTask.run(AbstractTask.java:92)
> > >         at org.apache.helix.task.TaskRunner.run(TaskRunner.java:71)
> > >         at
> > > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> > >         at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> > >         at
> > >
> > >
> >
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
> > >         at
> > >
> > >
> >
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
> > >         at
> > >
> > >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> > >         at
> > >
> > >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> > >         at java.lang.Thread.run(Thread.java:748)
> > >
> > > Thanks
> > > Dimuthu
> > >
> >
> >
> > --
> > Junkai Xue
> >
>


-- 
Junkai Xue

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