Karthiek created HELIX-578:
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Summary: 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
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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