An unexpected error has occurred. Please check the logs for additional details.

[#1]

Dear Community,

NiFi locally installed on my laptop was working fine until today that I got the following error in the URL. 

An unexpected error has occurred. Please check the logs for additional details

This is the error that I am seeing in the log file.

2022-06-17 09:42:45,569 INFO [main] o.e.jetty.server.handler.ContextHandler Started o.e.j.w.WebAppContext@759a678a{nifi-error,/,file:///C:/Users/alshahin/nifi-1.15.3/work/jetty/nifi-web-error-1.15.3.war/webapp/,AVAILABLE}{.\work\nar\extensions\nifi-server-nar-1.15.3.nar-unpacked\NAR-INF\bundled-dependencies\nifi-web-error-1.15.3.war}

Any help is appreciated.

Thanks

Regards

Alireza

[#2]

Hi,

Which system did you install Nifi on ? If windows try to click any Java job running in the background and restart nifi.

[#3]

Dear SANSAL,

Thanks a lot to reply.

Now that I am looking closer I see the following error which is java related as you mentioned, but I do not see any java job running on the background in Windows Task Manager? Any idea?

2022-06-17 09:41:29,787 ERROR [NiFi Web Server-42] o.a.nifi.web.api.config.ThrowableMapper An unexpected error has occurred: org.xerial.snappy.SnappyError: [FAILED_TO_LOAD_NATIVE_LIBRARY] Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @4f30e789. Returning Internal Server Error response.
org.xerial.snappy.SnappyError: [FAILED_TO_LOAD_NATIVE_LIBRARY] Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @4f30e789
at org.xerial.snappy.SnappyLoader.injectSnappyNativeLoader(SnappyLoader.java:297)
at org.xerial.snappy.SnappyLoader.load(SnappyLoader.java:227)
at org.xerial.snappy.Snappy.<clinit>(Snappy.java:48)
at org.apache.nifi.processors.hive.PutHiveStreaming.<clinit>(PutHiveStreaming.java:158)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:488)
at java.base/java.lang.Class.forName(Class.java:467)
at org.apache.nifi.nar.StandardExtensionDiscoveringManager.getClass(StandardExtensionDiscoveringManager.java:330)
at org.apache.nifi.web.api.dto.DtoFactory.fromDocumentedTypes(DtoFactory.java:3126)
at org.apache.nifi.web.controller.ControllerFacade.getFlowFileProcessorTypes(ControllerFacade.java:474)
at org.apache.nifi.web.controller.ControllerFacade$$FastClassBySpringCGLIB$$5a42ba54.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:783)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:698)
at org.apache.nifi.web.controller.ControllerFacade$$EnhancerBySpringCGLIB$$7567e0d9.getFlowFileProcessorTypes(<generated>)
at org.apache.nifi.web.StandardNiFiServiceFacade.getProcessorTypes(StandardNiFiServiceFacade.java:3603)
at org.apache.nifi.web.StandardNiFiServiceFacade$$FastClassBySpringCGLIB$$358780e0.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:783)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89)
at org.apache.nifi.web.NiFiServiceFacadeLock.proceedWithReadLock(NiFiServiceFacadeLock.java:161)
at org.apache.nifi.web.NiFiServiceFacadeLock.getLock(NiFiServiceFacadeLock.java:120)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:634)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:624)
at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:72)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:698)
at org.apache.nifi.web.StandardNiFiServiceFacade$$EnhancerBySpringCGLIB$$b719467d.getProcessorTypes(<generated>)
at org.apache.nifi.web.api.FlowResource.getProcessorTypes(FlowResource.java:1213)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:124)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:167)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:176)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:475)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:397)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:255)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:394)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:366)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:319)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1459)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1631)
at org.apache.nifi.web.filter.RequestLogger.doFilter(RequestLogger.java:66)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:327)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:115)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:81)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:126)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:81)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.apache.nifi.web.security.NiFiAuthenticationFilter.authenticate(NiFiAuthenticationFilter.java:94)
at org.apache.nifi.web.security.NiFiAuthenticationFilter.doFilter(NiFiAuthenticationFilter.java:56)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.apache.nifi.web.security.NiFiAuthenticationFilter.authenticate(NiFiAuthenticationFilter.java:94)
at org.apache.nifi.web.security.NiFiAuthenticationFilter.doFilter(NiFiAuthenticationFilter.java:56)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.oauth2.server.resource.web.BearerTokenAuthenticationFilter.doFilterInternal(BearerTokenAuthenticationFilter.java:121)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.apache.nifi.web.security.NiFiAuthenticationFilter.authenticate(NiFiAuthenticationFilter.java:94)
at org.apache.nifi.web.security.NiFiAuthenticationFilter.doFilter(NiFiAuthenticationFilter.java:56)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:117)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:211)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:183)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.apache.nifi.web.filter.TimerFilter.doFilter(TimerFilter.java:51)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.apache.nifi.web.filter.ExceptionFilter.doFilter(ExceptionFilter.java:46)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:201)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.eclipse.jetty.servlets.DoSFilter.doFilterChain(DoSFilter.java:487)
at org.eclipse.jetty.servlets.DoSFilter.doFilter(DoSFilter.java:336)
at org.eclipse.jetty.servlets.DoSFilter.doFilter(DoSFilter.java:301)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.apache.nifi.web.security.headers.XContentTypeOptionsFilter.doFilter(XContentTypeOptionsFilter.java:48)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.apache.nifi.web.security.headers.XSSProtectionFilter.doFilter(XSSProtectionFilter.java:48)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.apache.nifi.web.security.headers.ContentSecurityPolicyFilter.doFilter(ContentSecurityPolicyFilter.java:47)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.apache.nifi.web.security.headers.XFrameOptionsFilter.doFilter(XFrameOptionsFilter.java:48)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:548)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:600)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1434)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1349)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:763)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:191)
at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:59)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:516)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:400)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:645)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:392)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
at java.base/java.lang.Thread.run(Thread.java:833)

[#4 · Accepted solution]

@arshahin 
NiFi is a pure java application.
What version of Java is your NiFi using (NiFi does not include Java JDK, so it must be installed on the host).
NiFi will also not start of Java is not installed, so your host has java installed somewhere.
NiFi supports Java JDK 8 and Java JDK 11 (in newer releases), and Java JDK 17 (in latest 1.16 releases).

So perhaps your issue is related to the Java version you are using in conjunction with the NiFi version?
Looking closely at you stack trace you see the snappy library issues is related to the PutHiveStreaming processor: 

at org.apache.nifi.processors.hive.PutHiveStreaming

https://issues.apache.org/jira/browse/NIFI-9282

https://issues.apache.org/jira/browse/NIFI-9527

Try upgrading to Apache NiFi 1.16 latest.

If you found this response assisted with your query, please take a moment to login and click on "Accept as Solution" below this post.

Thank you,

Matt

[#5]

Dear @MattWho 

Thanks a lot for the response. 

I installed Java SDK 11 and that helps to run NiFi on my laptop. I also change the environmental variables. I add JAVA_HOME under user variables and defined it like %JAVA_HOME%\bin in the path and now it is working fine. For my desktop I did the same thing and I notice NI applications (LabView) installed on my desktop was also using port 8080, so I fixed that one as well. NiFi is working fine on my desktop as well. 

I also found the following link relevant and useful for any other community members getting the same error:

https://stackoverflow.com/questions/69830860/nifi-will-run-but-wont-open-in-browser-possible-error-w...

All the best 

Alireza