[jira] [Created] (NIFI-7414) NiFi fails to startup if it encounters some unicode characters in the flow.xml.gz

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

Mark Payne created NIFI-7414:
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             Summary: NiFi fails to startup if it encounters some unicode characters in the flow.xml.gz
                 Key: NIFI-7414
                 URL: https://issues.apache.org/jira/browse/NIFI-7414
             Project: Apache NiFi
          Issue Type: Bug
          Components: Core Framework
            Reporter: Mark Payne
            Assignee: Mark Payne


There are some elements where NiFi does not strip out invalid XML characters when writing out the flow.xml.gz. For example, if a variable is created and the variable's value has a unicode 0x0001 character in it, NiFi will accept the input but then will fail to restart with the following stack trace:
{code:java}
2020-04-30 13:06:16,834 WARN [main] org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down.2020-04-30 13:06:16,834 WARN [main] org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down.org.apache.nifi.controller.serialization.FlowSerializationException: org.xml.sax.SAXParseException; lineNumber: 51; columnNumber: 30; Character reference "&# at org.apache.nifi.cluster.protocol.StandardDataFlow.parseFlowBytes(StandardDataFlow.java:140) at org.apache.nifi.cluster.protocol.StandardDataFlow.getFlowDocument(StandardDataFlow.java:97) at org.apache.nifi.controller.StandardFlowSynchronizer.sync(StandardFlowSynchronizer.java:183) at org.apache.nifi.controller.FlowController.synchronize(FlowController.java:1426) at org.apache.nifi.persistence.StandardXMLFlowConfigurationDAO.load(StandardXMLFlowConfigurationDAO.java:89) at org.apache.nifi.controller.StandardFlowService.loadFromBytes(StandardFlowService.java:792) at org.apache.nifi.controller.StandardFlowService.load(StandardFlowService.java:537) at org.apache.nifi.web.contextlistener.ApplicationStartupContextListener.contextInitialized(ApplicationStartupContextListener.java:72) at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:930) at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:553) at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:889) at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:356) at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1445) at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1409) at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:822) at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:275) at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:524) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72) 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:72) 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:425) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72) 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:72) 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:72) at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169) at org.eclipse.jetty.server.Server.start(Server.java:407) 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:371) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72) at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:995) at org.apache.nifi.NiFi.<init>(NiFi.java:158) at org.apache.nifi.NiFi.<init>(NiFi.java:72) at org.apache.nifi.NiFi.main(NiFi.java:301)Caused by: org.xml.sax.SAXParseException: Character reference "&# at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203) at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:177) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:400) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327) at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1472) at com.sun.org.apache.xerces.internal.impl.XMLScanner.scanCharReferenceValue(XMLScanner.java:1345) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3053) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:842) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:771) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141) at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243) at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:339) at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:121) at org.apache.nifi.cluster.protocol.StandardDataFlow.parseFlowBytes(StandardDataFlow.java:138) ... 44 common frames omitted {code}



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