java.lang.UnsupportedClassVersionError: com/allen_sauer/gwt/log/rebind/LogMessageFormatterGenerator : Unsupported major.minor version 51.0

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    java.lang.UnsupportedClassVersionError: com/allen_sauer/gwt/log/rebind/LogMessageFormatterGenerator : Unsupported major.minor version 51.0
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    java.lang.UnsupportedClassVersionError: Bad version number in .class file
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Root Cause Analysis

  1. java.lang.UnsupportedClassVersionError

    com/allen_sauer/gwt/log/rebind/LogMessageFormatterGenerator : Unsupported major.minor version 51.0

    at java.lang.ClassLoader.defineClass1()
  2. Java RT
    ClassLoader.loadClass
    1. java.lang.ClassLoader.defineClass1(Native Method)
    2. java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    3. java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    4. java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    5. java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    6. java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    7. java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    8. java.security.AccessController.doPrivileged(Native Method)
    9. java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    10. java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    11. sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    12. java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    12 frames
  3. GWT dev
    ReflectiveParser$Impl.startElement
    1. com.google.gwt.dev.cfg.ModuleDefSchema$ClassAttrCvt.convertToArg(ModuleDefSchema.java:888)
    2. com.google.gwt.dev.util.xml.HandlerArgs.convertToArg(HandlerArgs.java:64)
    3. com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:221)
    4. com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:294)
    4 frames
  4. Xerces2-j
    SAXParserImpl$JAXPSAXParser.parse
    1. org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
    2. org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(Unknown Source)
    3. org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
    4. org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
    5. org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    6. org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    7. org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    8. org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    9. org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    10. org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    10 frames
  5. GWT dev
    ModuleDefSchema$BodySchema.__inherits_begin
    1. com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:347)
    2. com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:68)
    3. com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:418)
    4. com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:346)
    5. com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:497)
    5 frames
  6. Java RT
    Method.invoke
    1. sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    2. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    3. java.lang.reflect.Method.invoke(Method.java:597)
    3 frames
  7. GWT dev
    ReflectiveParser$Impl.startElement
    1. com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
    2. com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:294)
    2 frames
  8. Xerces2-j
    SAXParserImpl$JAXPSAXParser.parse
    1. org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
    2. org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
    3. org.apache.xerces.impl.dtd.XMLDTDValidator.emptyElement(Unknown Source)
    4. org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
    5. org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
    6. org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    7. org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    8. org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    9. org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    10. org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    11. org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    11 frames
  9. GWT dev
    ModuleDefSchema$BodySchema.__inherits_begin
    1. com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:347)
    2. com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:68)
    3. com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:418)
    4. com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:346)
    5. com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:497)
    5 frames
  10. Java RT
    Method.invoke
    1. sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    2. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    3. java.lang.reflect.Method.invoke(Method.java:597)
    3 frames
  11. GWT dev
    ReflectiveParser$Impl.startElement
    1. com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
    2. com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:294)
    2 frames
  12. Xerces2-j
    SAXParserImpl$JAXPSAXParser.parse
    1. org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
    2. org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
    3. org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
    4. org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
    5. org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    6. org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    7. org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    8. org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    9. org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    10. org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    10 frames
  13. GWT dev
    CodeServer.main
    1. com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:347)
    2. com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:68)
    3. com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:418)
    4. com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:346)
    5. com.google.gwt.dev.cfg.ModuleDefLoader.load(ModuleDefLoader.java:267)
    6. com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:210)
    7. com.google.gwt.dev.cfg.ModuleDefLoader.loadFromResources(ModuleDefLoader.java:170)
    8. com.google.gwt.dev.codeserver.Recompiler.loadModule(Recompiler.java:214)
    9. com.google.gwt.dev.codeserver.Recompiler.noCompile(Recompiler.java:146)
    10. com.google.gwt.dev.codeserver.ModuleState.<init>(ModuleState.java:52)
    11. com.google.gwt.dev.codeserver.CodeServer.makeModules(CodeServer.java:120)
    12. com.google.gwt.dev.codeserver.CodeServer.start(CodeServer.java:95)
    13. com.google.gwt.dev.codeserver.CodeServer.main(CodeServer.java:71)
    14. com.google.gwt.dev.codeserver.CodeServer.main(CodeServer.java:49)
    14 frames