Santiago, I do imagine that NIFI-8266 may be related. However, a couple of things to note. Validation is performed asynchronously. Meaning it’s done in the background and not when you try to enter the Process Group. So validation problems should not prevent you from entering the PG. Also, when a component is disabled, validation is not performed. So not sure why this would affect anything.
Can you check the nifi-user log when trying to go into the Process Group? Does that show anything? On Mar 11, 2021, at 11:16 AM, Santiago Acosta <[email protected]<mailto:[email protected]>> wrote: Hi all, [Nifi-1.10.0] I added an InvokeScriptedProcessor to my Process Group. When I added the groovy script as the body to the processor, the frontend kicked me out with a generic error message and a link to nifi-home. I can navigate to home and to other PGs but every time I try to get into my PG, I get the same generic error message: An unexpected error has occurred. Please check the logs for additional details I went hunting into the logs and I found the following ------------------------------------------------------------------------------------------------------------------------------------------------ 2021-03-11 14:21:50,898 ERROR [Validate Components Thread-1] o.a.n.p.script.InvokeScriptedProcessor InvokeScriptedProcessor[id=20352751-317b-16e1-4831-8022edecab6c] Unable to validate the script Processor: java.lang.RuntimeException: java .lang.NullPointerException: java.lang.RuntimeException: java.lang.NullPointerException java.lang.RuntimeException: java.lang.NullPointerException at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.invokeImplSafe(GroovyScriptEngineImpl.java:382) at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.access$200(GroovyScriptEngineImpl.java:94) at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl$4.invoke(GroovyScriptEngineImpl.java:423) at com.sun.proxy.$Proxy119.validate(Unknown Source) at org.apache.nifi.processors.script.InvokeScriptedProcessor.customValidate(InvokeScriptedProcessor.java:491) at org.apache.nifi.components.AbstractConfigurableComponent.validate(AbstractConfigurableComponent.java:128) at org.apache.nifi.controller.AbstractComponentNode.computeValidationErrors(AbstractComponentNode.java:602) at org.apache.nifi.controller.StandardProcessorNode.computeValidationErrors(StandardProcessorNode.java:1057) at org.apache.nifi.controller.AbstractComponentNode.performValidation(AbstractComponentNode.java:569) at org.apache.nifi.controller.AbstractComponentNode.performValidation(AbstractComponentNode.java:583) at org.apache.nifi.components.validation.StandardValidationTrigger.trigger(StandardValidationTrigger.java:52) at org.apache.nifi.components.validation.StandardValidationTrigger.lambda$triggerAsync$0(StandardValidationTrigger.java:45) 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$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.NullPointerException: null at org.apache.nifi.components.AbstractConfigurableComponent.validate(AbstractConfigurableComponent.java:90) at sun.reflect.GeneratedMethodAccessor1079.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:104) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:326) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1217) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1041) at org.codehaus.groovy.runtime.InvokerHelper.invokePogoMethod(InvokerHelper.java:1011) at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:994) at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.invokeImplSafe(GroovyScriptEngineImpl.java:377) ... 19 common frames omitted 2021-03-11 14:21:50,899 ERROR [Validate Components Thread-1] o.a.n.controller.StandardProcessorNode Failed to perform validation java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.apache.nifi.processor.Relationship at org.apache.nifi.controller.StandardProcessorNode.getUndefinedRelationships(StandardProcessorNode.java:992) at org.apache.nifi.controller.StandardProcessorNode.computeValidationErrors(StandardProcessorNode.java:1064) at org.apache.nifi.controller.AbstractComponentNode.performValidation(AbstractComponentNode.java:569) at org.apache.nifi.controller.AbstractComponentNode.performValidation(AbstractComponentNode.java:583) at org.apache.nifi.components.validation.StandardValidationTrigger.trigger(StandardValidationTrigger.java:52) at org.apache.nifi.components.validation.StandardValidationTrigger.lambda$triggerAsync$0(StandardValidationTrigger.java:45) 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) ------------------------------------------------------------------------------------------------------------------------------------------------ After a that, the following error repeated constantly ------------------------------------------------------------------------------------------------------------------------------------------------ 2021-03-11 14:22:16,018 ERROR [Validate Components Thread-2] o.a.n.controller.StandardProcessorNode Failed to perform validation java.lang.ClassCastException: null ------------------------------------------------------------------------------------------------------------------------------------------------ I disabled the entire PG to see if I could navigate inside and delete the processor but still shows the same error. There is nothing being recorded in the log regarding the error. I have tried using CURL to see if I can manually delete the processor but I cannot retrieve it. The response is the generic error message (also, nothing is showing in the logs). curl -X GET http://127.0.0.1:8080/nifi-api/processors/the-uuid I cannot run a DELETE because I do not have the revision number (and I don't know how to get it other than the previous get request). I also tried to generate a template of the PG so that I could manually edit the XML and remove all references to the processor but I am getting the same error message. Does anyone know which other avenues I have to get rid of the processor? I have found in NiFi version 1.13.1 that ticket NIFI-8266<https://issues.apache.org/jira/browse/NIFI-8266> seems to be related. I am afraid that if I shut down the service, I will not be able to get it back online, however, I am willing to upgrade as a last resort. If upgrading were necessary, can I jump from 1.10.0 straight into 1.13.1? -- Best regards, Santiago
