[NIFI-7622] updateParameterContext NullPointerException on StandardProcessGroup.java:4220

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.11.4
• Fix Version/s: 1.12.0
• Assignee: Bryan Bende
• Reporter: Eric Secules
• Created: 09/Jul/20 05:47
• Updated: 24/Jul/20 21:16
• Resolved: 24/Jul/20 21:16

Description

I am getting this null pointer exception when importing one versioned flow from a registry which contains another versioned flow and each uses different parameter contexts.

I am using version 1.11.4 of NiFi

This error is blocking me from developing flows which comprise common components and project-specific components that use their own parameter contexts.

Attached a screen cap of the state of the stack at StandardProcessGroup.java:4220

2020-07-09 05:33:10,414 ERROR [NiFi Web Server-86] o.a.nifi.web.api.config.ThrowableMapper An unexpected error has occurred: java.lang.NullPointerException. Returning Internal Server Error response.
java.lang.NullPointerException: null
        at org.apache.nifi.groups.StandardProcessGroup.updateParameterContext(StandardProcessGroup.java:4220)
        at org.apache.nifi.groups.StandardProcessGroup.updateProcessGroup(StandardProcessGroup.java:3754)
        at org.apache.nifi.groups.StandardProcessGroup.addProcessGroup(StandardProcessGroup.java:4324)
        at org.apache.nifi.groups.StandardProcessGroup.updateProcessGroup(StandardProcessGroup.java:3876)
        at org.apache.nifi.groups.StandardProcessGroup.addProcessGroup(StandardProcessGroup.java:4324)
        at org.apache.nifi.groups.StandardProcessGroup.updateProcessGroup(StandardProcessGroup.java:3876)
        at org.apache.nifi.groups.StandardProcessGroup.addProcessGroup(StandardProcessGroup.java:4324)
        at org.apache.nifi.groups.StandardProcessGroup.updateProcessGroup(StandardProcessGroup.java:3876)
        at org.apache.nifi.groups.StandardProcessGroup.updateFlow(StandardProcessGroup.java:3653)
        at org.apache.nifi.web.dao.impl.StandardProcessGroupDAO.updateProcessGroupFlow(StandardProcessGroupDAO.java:408)
        at org.apache.nifi.web.dao.impl.StandardProcessGroupDAO$$FastClassBySpringCGLIB$$10a99b47.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:736)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
        at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:84)
        at org.apache.nifi.audit.ProcessGroupAuditor.updateProcessGroupFlowAdvice(ProcessGroupAuditor.java:313)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:627)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:616)
        at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:671)
        at org.apache.nifi.web.dao.impl.StandardProcessGroupDAO$$EnhancerBySpringCGLIB$$202f172f.updateProcessGroupFlow(<generated>)
        at org.apache.nifi.web.StandardNiFiServiceFacade$14.update(StandardNiFiServiceFacade.java:5044)
        at org.apache.nifi.web.revision.NaiveRevisionManager.updateRevision(NaiveRevisionManager.java:117)
        at org.apache.nifi.web.StandardNiFiServiceFacade.updateProcessGroupContents(StandardNiFiServiceFacade.java:5040)
        at org.apache.nifi.web.StandardNiFiServiceFacade$$FastClassBySpringCGLIB$$358780e0.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:736)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
        at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:84)
        at org.apache.nifi.web.NiFiServiceFacadeLock.proceedWithWriteLock(NiFiServiceFacadeLock.java:179)
        at org.apache.nifi.web.NiFiServiceFacadeLock.updateLock(NiFiServiceFacadeLock.java:66)
        at sun.reflect.GeneratedMethodAccessor566.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)

Issue Links

• is related to: NIFI-7556 NullPointerException when changing version of process group with versioned child process group
• links to: GitHub Pull Request #4401