[NIFI-8190] NPE enabling controller services on PG when reference doesn't exist

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.13.0
• Assignee: Bryan Bende
• Reporter: Bryan Bende
• Created: 01/Feb/21 19:25
• Updated: 01/Feb/21 20:48
• Resolved: 01/Feb/21 20:48

Description

2021-02-01 13:41:34,538 ERROR [Framework Task Thread Thread-3] org.apache.nifi.engine.FlowEngine Uncaught Exception in Runnable task
java.lang.NullPointerException: null
	at org.apache.nifi.controller.service.StandardControllerServiceProvider.enableControllerServices(StandardControllerServiceProvider.java:237)
	at org.apache.nifi.controller.service.StandardControllerServiceProvider.lambda$enableControllerServicesAsync$0(StandardControllerServiceProvider.java:225)
	at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
	at java.util.concurrent.Executors$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) 

Steps to reproduce:

1) Make a flow with CS in root PG, and CS in child PG references the CS in parent

2) Version control to registry

3) Delete everything from NiFi side

4) Import flow from registry, now have single CS in child, referencing missing CS

5) Issue curl command to enable services on the child PG:

curl -H "Content-Type: application/json" -X PUT --data "{ \"id\" : \"5eddbdcc-0177-1000-22fe-321b6445813b\", \"state\" : \"ENABLED\" }" http://localhost:8080/nifi-api/flow/process-groups/5eddbdcc-0177-1000-22fe-321b6445813b/controller-services

Issue Links

• links to: GitHub Pull Request #4795