java.lang.NullPointerException

Stack Overflow | Collins | 7 months ago
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    How to change HtmlUnit UserAgent

    Stack Overflow | 7 months ago | Collins
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at net.sourceforge.htmlunit.corejs.javascript.Delegator.getPrototype()
    2. HtmlUnit Core JS
      ContextFactory.doTopCall
      1. net.sourceforge.htmlunit.corejs.javascript.Delegator.getPrototype(Delegator.java:173)
      2. net.sourceforge.htmlunit.corejs.javascript.ScriptableObject.getProperty(ScriptableObject.java:1619)
      3. net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.getPropFunctionAndThisHelper(ScriptRuntime.java:2227)
      4. net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.getPropFunctionAndThis(ScriptRuntime.java:2214)
      5. net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:3143)
      6. net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:2487)
      7. net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:164)
      8. net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:398)
      8 frames
    3. HtmlUnit
      HtmlUnitContextFactory.doTopCall
      1. com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:252)
      1 frame
    4. HtmlUnit Core JS
      InterpretedFunction.exec
      1. net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3065)
      2. net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:175)
      2 frames
    5. HtmlUnit
      JavaScriptEngine$HtmlUnitContextAction.run
      1. com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$3.doRun(JavaScriptEngine.java:794)
      2. com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:906)
      2 frames
    6. HtmlUnit Core JS
      ContextFactory.call
      1. net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:515)
      2. net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507)
      2 frames
    7. HtmlUnit
      HTMLParser$HtmlUnitDOMBuilder.endElement
      1. com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:803)
      2. com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:779)
      3. com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:767)
      4. com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptIfPossible(HtmlPage.java:904)
      5. com.gargoylesoftware.htmlunit.html.HtmlScript.executeInlineScriptIfNeeded(HtmlScript.java:307)
      6. com.gargoylesoftware.htmlunit.html.HtmlScript.executeScriptIfNeeded(HtmlScript.java:368)
      7. com.gargoylesoftware.htmlunit.html.HtmlScript$2.execute(HtmlScript.java:238)
      8. com.gargoylesoftware.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:257)
      9. com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:772)
      9 frames
    8. Xerces2-j
      AbstractSAXParser.endElement
      1. org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
      1 frame
    9. HtmlUnit
      HTMLParser$HtmlUnitDOMBuilder.endElement
      1. com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:729)
      1 frame
    10. net.sourceforge.htmlunit
      HTMLConfiguration.parse
      1. net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1209)
      2. net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1111)
      3. net.sourceforge.htmlunit.cyberneko.filters.DefaultFilter.endElement(DefaultFilter.java:207)
      4. net.sourceforge.htmlunit.cyberneko.filters.NamespaceBinder.endElement(NamespaceBinder.java:337)
      5. net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:3137)
      6. net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2100)
      7. net.sourceforge.htmlunit.cyberneko.HTMLScanner.scanDocument(HTMLScanner.java:927)
      8. net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:506)
      9. net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:459)
      9 frames
    11. Xerces2-j
      XMLParser.parse
      1. org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
      1 frame
    12. HtmlUnit
      WebClient.getPage
      1. com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.parse(HTMLParser.java:979)
      2. com.gargoylesoftware.htmlunit.html.HTMLParser.parse(HTMLParser.java:241)
      3. com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:187)
      4. com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:269)
      5. com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:157)
      6. com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:512)
      7. com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:386)
      8. com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:304)
      9. com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:451)
      10. com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:436)
      10 frames
    13. nairaland
      UnitTest$1.run
      1. nairaland.UnitTest$1.run(UnitTest.java:28)
      1 frame