[jira] [Created] (NIFI-10937) If Registry Client exists in flow, NiFi will fail to startup from flow.xml.gz

["Mark Payne (Jira)" <ji...@apache.org>]

Mark Payne created NIFI-10937:
---------------------------------

             Summary: If Registry Client exists in flow, NiFi will fail to startup from flow.xml.gz
                 Key: NIFI-10937
                 URL: https://issues.apache.org/jira/browse/NIFI-10937
             Project: Apache NiFi
          Issue Type: Bug
          Components: Core Framework
            Reporter: Mark Payne
            Assignee: Mark Payne


If there exists a flow and a Registry Client has been added, upon restart everything loads properly from the flow.json.gz. But if for any reason we attempt to load from flow.xml.gz (because flow.json.gz was removed), NiFi will fail to startup with a NullPointerException:
{code:java}
2022-12-02 16:15:35,462 WARN [main] org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down.
java.lang.NullPointerException: null
        at java.util.Comparator.lambda$comparing$77a9974f$1(Comparator.java:469)
        at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355)
        at java.util.TimSort.sort(TimSort.java:220)
        at java.util.Arrays.sort(Arrays.java:1512)
        at java.util.ArrayList.sort(ArrayList.java:1464)
        at org.apache.nifi.fingerprint.FingerprintFactory.addFlowControllerFingerprint(FingerprintFactory.java:200)
        at org.apache.nifi.fingerprint.FingerprintFactory.createFingerprint(FingerprintFactory.java:155)
        at org.apache.nifi.fingerprint.FingerprintFactory.createFingerprint(FingerprintFactory.java:129)
        at org.apache.nifi.controller.inheritance.FlowFingerprintCheck.checkInheritability(FlowFingerprintCheck.java:45)
        at org.apache.nifi.controller.XmlFlowSynchronizer.sync(XmlFlowSynchronizer.java:205)
        at org.apache.nifi.controller.serialization.StandardFlowSynchronizer.sync(StandardFlowSynchronizer.java:42)
        at org.apache.nifi.controller.FlowController.synchronize(FlowController.java:1525)
        at org.apache.nifi.persistence.StandardFlowConfigurationDAO.load(StandardFlowConfigurationDAO.java:104)
        at org.apache.nifi.controller.StandardFlowService.loadFromBytes(StandardFlowService.java:817)
        at org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:538)
        at org.apache.nifi.web.contextlistener.ApplicationStartupContextListener.contextInitialized(ApplicationStartupContextListener.java:67)
        at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:1073)
        at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:572)
        at org.eclipse.jetty.server.handler.ContextHandler.contextInitialized(ContextHandler.java:1002)
        at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:765)
        at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:379)
        at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1449)
        at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1414)
        at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:916)
        at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:288)
        at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:524)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117)
        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110)
        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)
        at org.eclipse.jetty.server.handler.gzip.GzipHandler.doStart(GzipHandler.java:426)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117)
        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117)
        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
        at org.eclipse.jetty.server.Server.start(Server.java:423)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110)
        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)
        at org.eclipse.jetty.server.Server.doStart(Server.java:387)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:814)
        at org.apache.nifi.NiFi.<init>(NiFi.java:172)
        at org.apache.nifi.NiFi.<init>(NiFi.java:83)
        at org.apache.nifi.NiFi.main(NiFi.java:332) {code}



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