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https://issues.apache.org/jira/browse/HELIX-578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lei Xia resolved HELIX-578.
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Resolution: Fixed
> NPE while deleting a job from a recurrent job queue
> ---------------------------------------------------
>
> Key: HELIX-578
> URL: https://issues.apache.org/jira/browse/HELIX-578
> Project: Apache Helix
> Issue Type: Bug
> Reporter: Karthiek
> Assignee: Lei Xia
> Priority: Critical
>
> Helix throws an NPE when we try to delete a job from recurrent job queue.
> Partial stacktrace:
> java.lang.NullPointerException
> at org.apache.helix.task.TaskDriver.deleteJob(TaskDriver.java:295)
> Helix is looking for workflow context's current state.
> WorkflowContext wCtx = TaskUtil.getWorkflowContext(_propertyStore, queueName);
> String workflowState =
> (wCtx != null) ? wCtx.getWorkflowState().name() :
> TaskState.NOT_STARTED.name();
> But for a recurring workflow, there is no "state" in the parent workflow's
> context. Only the scheduled workflows will have a "state". Hence the NPE.
> To ensure that queue is stopped, Helix should look at the context of
> last-scheduled-workflow instead of the parent workflow.
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