NPE in Workflow Repair Logic

[sks1995]

Describe the bug Workflow repair logic fails with NPE when workflow information is not present in data store.

java.lang.NullPointerException: null
	at com.netflix.conductor.core.reconciliation.WorkflowRepairService.verifyAndRepairWorkflowTasks(WorkflowRepairService.java:105) ~[conductor-core-3.11.3.jar:3.11.3]
	at com.netflix.conductor.core.reconciliation.WorkflowSweeper.sweep(WorkflowSweeper.java:74) ~[conductor-core-3.11.3.jar:3.11.3]
	at com.netflix.conductor.core.reconciliation.WorkflowSweeper.sweepAsync(WorkflowSweeper.java:62) ~[conductor-core-3.11.3.jar:3.11.3]
	at com.netflix.conductor.core.reconciliation.WorkflowSweeper$$FastClassBySpringCGLIB$$f994448e.invoke(<generated>) ~[conductor-core-3.11.3.jar:3.11.3]
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[conductor-es7-persistence-3.11.3.jar:3.11.3]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:793) ~[conductor-es7-persistence-3.11.3.jar:3.11.3]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[conductor-es7-persistence-3.11.3.jar:3.11.3]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763) ~[conductor-es7-persistence-3.11.3.jar:3.11.3]
	at org.springframework.aop.interceptor.AsyncExecutionInterceptor.lambda$invoke$0(AsyncExecutionInterceptor.java:115) ~[conductor-es7-persistence-3.11.3.jar:3.11.3]
	at org.springframework.aop.interceptor.AsyncExecutionAspectSupport.lambda$doSubmit$3(AsyncExecutionAspectSupport.java:278) ~[conductor-es7-persistence-3.11.3.jar:3.11.3]
	at java.util.concurrent.CompletableFuture$AsyncSupply.run$$$capture(CompletableFuture.java:1700) [?:?]
	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java) [?:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
	at java.lang.Thread.run(Thread.java:829) [?:?]

Details Conductor version: 3.13.0 Persistence implementation: Redis Queue implementation: Postgres Lock: Redis Workflow definition: Task definition: Event handler definition:

To Reproduce Steps to reproduce the behavior:

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4. See error

Expected behavior A clear and concise description of what you expected to happen. There should be check to avoid process when workflow info is not found.

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Additional context Add any other context about the problem here.

PR for fixing : https://github.com/Netflix/conductor/pull/3313