Mark Payne created NIFI-7414:
--------------------------------
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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