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  1. Apache NiFi
  2. NIFI-7499

NullPointerException when read access policy missing at process group import

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 1.11.4
    • Fix Version/s: None
    • Component/s: Core UI, Flow Versioning
    • Labels:
      None

      Description

      My user hasĀ write access to the root process group, but not read access. I import a process group from the Registry using the CLI (or via the UI, same result). It'll generate the following NullPointerException on server side:

      2020-05-31 12:42:51,020 ERROR [NiFi Web Server-19] 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.web.api.ProcessGroupResource.lambda$createProcessGroup$46(ProcessGroupResource.java:1861)
      	at org.apache.nifi.web.api.ApplicationResource.withWriteLock(ApplicationResource.java:778)
      	at org.apache.nifi.web.api.ProcessGroupResource.createProcessGroup(ProcessGroupResource.java:1807)
      	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      	at java.lang.reflect.Method.invoke(Method.java:498)
      	at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:76)
      	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:148)
      	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:191)
      	at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:200)
      	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:103)
      	at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:493)
      	at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:415)
      	at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:104)
      	at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:277)
      	at org.glassfish.jersey.internal.Errors$1.call(Errors.java:272)
      	at org.glassfish.jersey.internal.Errors$1.call(Errors.java:268)
      	at org.glassfish.jersey.internal.Errors.process(Errors.java:316)
      	at org.glassfish.jersey.internal.Errors.process(Errors.java:298)
      	at org.glassfish.jersey.internal.Errors.process(Errors.java:268)
      	at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:289)
      	at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:256)
      	at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:703)
      	at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:416)
      	at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:370)
      	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:389)
      	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:342)
      	at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:229)
      	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:876)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1623)
      	at org.apache.nifi.web.filter.RequestLogger.doFilter(RequestLogger.java:66)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
      	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
      	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
      	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
      	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
      	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
      	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
      	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
      	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
      	at org.apache.nifi.web.security.NiFiAuthenticationFilter.doFilter(NiFiAuthenticationFilter.java:61)
      	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
      	at org.apache.nifi.web.security.NiFiAuthenticationFilter.doFilter(NiFiAuthenticationFilter.java:61)
      	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
      	at org.apache.nifi.web.security.NiFiAuthenticationFilter.doFilter(NiFiAuthenticationFilter.java:61)
      	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
      	at org.apache.nifi.web.security.NiFiAuthenticationFilter.authenticate(NiFiAuthenticationFilter.java:100)
      	at org.apache.nifi.web.security.NiFiAuthenticationFilter.doFilter(NiFiAuthenticationFilter.java:59)
      	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
      	at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:96)
      	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
      	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
      	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
      	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347)
      	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:263)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
      	at org.apache.nifi.web.filter.TimerFilter.doFilter(TimerFilter.java:51)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
      	at org.apache.nifi.web.filter.ExceptionFilter.doFilter(ExceptionFilter.java:46)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
      	at org.apache.nifi.web.security.headers.StrictTransportSecurityFilter.doFilter(StrictTransportSecurityFilter.java:48)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
      	at org.apache.nifi.web.security.headers.XSSProtectionFilter.doFilter(XSSProtectionFilter.java:48)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
      	at org.apache.nifi.web.security.headers.ContentSecurityPolicyFilter.doFilter(ContentSecurityPolicyFilter.java:47)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
      	at org.apache.nifi.web.security.headers.XFrameOptionsFilter.doFilter(XFrameOptionsFilter.java:48)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
      	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
      	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
      	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
      	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
      	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
      	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1711)
      	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
      	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1347)
      	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
      	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
      	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1678)
      	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
      	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1249)
      	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
      	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:152)
      	at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:753)
      	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
      	at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:61)
      	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
      	at org.eclipse.jetty.server.Server.handle(Server.java:505)
      	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
      	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
      	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
      	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
      	at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:427)
      	at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:321)
      	at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:159)
      	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
      	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
      	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
      	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
      	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
      	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
      	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
      	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:781)
      	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:917)
      	at java.lang.Thread.run(Thread.java:748)
      

      However, please note that the process group is correctly imported.

      If I add read access to the root process group to my user, there is no error.

      A fix should be added to prevent the NPE.

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            • Assignee:
              Unassigned
              Reporter:
              pvillard Pierre Villard
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              Dates

              • Created:
                Updated: