[NIFI-9834] ExecuteStateless fails when the output FlowFile has no content

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.17.0, 1.16.1
• Component/s: NiFi Stateless
• Assignee: Mark Payne
• Reporter: Peter Turcsanyi
• Created: 24/Mar/22 20:45
• Updated: 04/Apr/22 18:28
• Resolved: 25/Mar/22 20:09

Description

Stateless flow: Input port -> UpdateAttibute -> Output port
Executor flow: GenerateFlowFile -> ExecuteStateless -> LogAttribute

When GFF produces a FF with content => no error

When GFF produces empty FF =>

2022-03-24 21:15:38,536 ERROR [Timer-Driven Process Thread-8] o.a.n.p.stateless.ExecuteStateless ExecuteStateless[id=5bb8285e-36cb-3c02-0aeb-0bd7f61d91c8] Failed to process session due to java.lang.NullPointerException; Processor Administratively Yielded for 1 sec: java.lang.NullPointerException
java.lang.NullPointerException: null
	at java.util.Objects.requireNonNull(Objects.java:203)
	at org.apache.nifi.stateless.repository.ByteArrayContentRepository.verifyClaim(ByteArrayContentRepository.java:243)
	at org.apache.nifi.stateless.repository.ByteArrayContentRepository.read(ByteArrayContentRepository.java:218)
	at org.apache.nifi.stateless.engine.StandardExecutionProgress$1.readContent(StandardExecutionProgress.java:189)
	at org.apache.nifi.processors.stateless.ExecuteStateless.createOutputFlowFiles(ExecuteStateless.java:691)
	at org.apache.nifi.processors.stateless.ExecuteStateless.runDataflow(ExecuteStateless.java:605)
	at org.apache.nifi.processors.stateless.ExecuteStateless.onTrigger(ExecuteStateless.java:506)
	at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
	at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1283)
	at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:214)
	at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:103)
	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.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	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)

Issue Links

• links to: GitHub Pull Request #5903