[jira] [Created] (HELIX-582) NPE while deleting a job from a recurrent job queue

["Xia Lei (JIRA)" <ji...@apache.org>]

Xia Lei created HELIX-582:
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             Summary: NPE while deleting a job from a recurrent job queue
                 Key: HELIX-582
                 URL: https://issues.apache.org/jira/browse/HELIX-582
             Project: Apache Helix
          Issue Type: Bug
          Components: helix-core
    Affects Versions: 0.6.4
            Reporter: Xia Lei




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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