I made another clean project with command prompt and ran into the same 
issue. Using fresh installations of jdk1.8.0_111 and apache-maven-3.3.9. 
M2_HOME, JAVA_HOME are set properly. gwt-2.8.0 folder was added to PATH. 
Btw, here's the only related topic I found so far 
https://groups.google.com/forum/#!topic/google-web-toolkit-contributors/fdWmFBtKvGA
 
<https://groups.google.com/forum/#!searchin/Google-Web-Toolkit-Contributors/java.lang.NoClassDefFoundError$3A$20org$2Fapache$2Ftools$2Fant$2Ftypes$2FZipScanner|sort:relevance/google-web-toolkit-contributors/fdWmFBtKvGA/WQO1bdyqCgAJ>

webAppCreator -out foo -templates maven,sample,readme com.example.foo.Foo

I ran "mvn clean" - no warnings. Then "mvn package" gives the same result:

[INFO] Scanning for projects...
[INFO]                                                                     
    
[INFO] 
------------------------------------------------------------------------
[INFO] Building com.example.foo.Foo 1.0-SNAPSHOT
[INFO] 
------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ Foo 
---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory 
c:\temp\mvnSampleGwtApp\foo\src\main\resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ Foo ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- gwt-maven-plugin:1.0-rc-6:import-sources (default) @ Foo ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 6 resources
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) 
@ Foo ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory 
c:\temp\mvnSampleGwtApp\foo\src\test\resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ 
Foo ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- gwt-maven-plugin:1.0-rc-6:import-test-sources (default) @ Foo ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 3 resources
[INFO] 
[INFO] --- maven-surefire-plugin:2.17:test (default-test) @ Foo ---
[INFO] Tests are skipped.
[INFO] 
[INFO] --- gwt-maven-plugin:1.0-rc-6:test (default) @ Foo ---
[INFO] GWT tests report directory: 
c:\temp\mvnSampleGwtApp\foo\target\surefire-reports

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running com.example.foo.FooSuite
Starting Jetty on port 0
   [WARN] ServletContainerInitializers: detected. Class hierarchy: empty
Loading inherited module 'com.example.foo.FooJUnit'
   Loading inherited module 'com.example.foo.Foo'
      Loading inherited module 'com.google.gwt.user.User'
         Loading inherited module 'com.google.gwt.event.Event'
            Loading inherited module 'com.google.gwt.dom.DOM'
               Loading inherited module 'com.google.gwt.safehtml.SafeHtml'
                  Loading inherited module 'com.google.gwt.http.HTTP'
                     Loading inherited module 'com.google.gwt.user.Timer'
                        [ERROR] Line 19: Unexpected exception while 
processing element 'source'
java.lang.NoClassDefFoundError: org/apache/tools/ant/types/ZipScanner
at 
com.google.gwt.dev.resource.impl.DefaultFilters.getScanner(DefaultFilters.java:240)
at 
com.google.gwt.dev.resource.impl.DefaultFilters$4.<init>(DefaultFilters.java:371)
at 
com.google.gwt.dev.resource.impl.DefaultFilters.getCustomFilter(DefaultFilters.java:370)
at 
com.google.gwt.dev.resource.impl.DefaultFilters.customJavaFilter(DefaultFilters.java:301)
at com.google.gwt.dev.cfg.ModuleDef.addSourcePackageImpl(ModuleDef.java:257)
at com.google.gwt.dev.cfg.ModuleDef.addSourcePackage(ModuleDef.java:246)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.addSourcePackage(ModuleDefSchema.java:860)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.addSourcePackage(ModuleDefSchema.java:817)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__source_end(ModuleDefSchema.java:717)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeEnd(HandlerMethod.java:272)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.endElement(ReflectiveParser.java:174)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.emptyElement(Unknown Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.emptyElement(Unknown Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at com.google.gwt.dev.cfg.ModuleDefLoader$1.load(ModuleDefLoader.java:95)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:193)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:170)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.createSyntheticModule(ModuleDefLoader.java:100)
at 
com.google.gwt.junit.CompileStrategy.maybeCompileModuleImpl2(CompileStrategy.java:166)
at 
com.google.gwt.junit.CompileStrategy.maybeCompileModuleImpl(CompileStrategy.java:113)
at 
com.google.gwt.junit.SimpleCompileStrategy.maybeCompileModule(SimpleCompileStrategy.java:36)
at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1313)
at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1281)
at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:670)
at com.google.gwt.junit.client.GWTTestCase.runTest(GWTTestCase.java:421)
at junit.framework.TestCase.runBare(TestCase.java:141)
at junit.framework.TestResult$1.protect(TestResult.java:122)
at junit.framework.TestResult.runProtected(TestResult.java:142)
at junit.framework.TestResult.run(TestResult.java:125)
at junit.framework.TestCase.run(TestCase.java:129)
at com.google.gwt.junit.client.GWTTestCase.run(GWTTestCase.java:247)
at junit.framework.TestSuite.runTest(TestSuite.java:255)
at junit.framework.TestSuite.run(TestSuite.java:250)
at junit.framework.TestSuite.runTest(TestSuite.java:255)
at junit.framework.TestSuite.run(TestSuite.java:250)
at 
org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:84)
at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264)
at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)
Caused by: java.lang.ClassNotFoundException: 
org.apache.tools.ant.types.ZipScanner
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 201 more
Tests run: 2, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 1.277 sec 
<<< FAILURE! - in com.example.foo.FooSuite
testGreetingService(com.example.foo.client.FooTest)  Time elapsed: 1.218 
sec  <<< ERROR!
com.google.gwt.core.ext.UnableToCompleteException: (see previous log 
entries)
at 
com.google.gwt.dev.util.xml.DefaultSchema.onHandlerException(DefaultSchema.java:62)
at com.google.gwt.dev.util.xml.Schema.onHandlerException(Schema.java:66)
at com.google.gwt.dev.util.xml.Schema.onHandlerException(Schema.java:66)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeEnd(HandlerMethod.java:281)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.endElement(ReflectiveParser.java:174)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.emptyElement(Unknown Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at 
com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:501)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:296)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown 
Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.emptyElement(Unknown Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:349)
at 
com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:70)
at 
com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:431)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:316)
at com.google.gwt.dev.cfg.ModuleDefLoader$1.load(ModuleDefLoader.java:95)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:193)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:170)
at 
com.google.gwt.dev.cfg.ModuleDefLoader.createSyntheticModule(ModuleDefLoader.java:100)
at 
com.google.gwt.junit.CompileStrategy.maybeCompileModuleImpl2(CompileStrategy.java:166)
at 
com.google.gwt.junit.CompileStrategy.maybeCompileModuleImpl(CompileStrategy.java:113)
at 
com.google.gwt.junit.SimpleCompileStrategy.maybeCompileModule(SimpleCompileStrategy.java:36)
at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1313)
at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1281)
at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:670)
at com.google.gwt.junit.client.GWTTestCase.runTest(GWTTestCase.java:421)
at junit.framework.TestCase.runBare(TestCase.java:141)
at junit.framework.TestResult$1.protect(TestResult.java:122)
at junit.framework.TestResult.runProtected(TestResult.java:142)
at junit.framework.TestResult.run(TestResult.java:125)
at junit.framework.TestCase.run(TestCase.java:129)
at com.google.gwt.junit.client.GWTTestCase.run(GWTTestCase.java:247)
at junit.framework.TestSuite.runTest(TestSuite.java:255)
at junit.framework.TestSuite.run(TestSuite.java:250)
at junit.framework.TestSuite.runTest(TestSuite.java:255)
at junit.framework.TestSuite.run(TestSuite.java:250)
at 
org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:84)
at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264)
at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)

testFieldVerifier(com.example.foo.client.FooTest)  Time elapsed: 0 sec  <<< 
ERROR!
com.google.gwt.core.ext.UnableToCompleteException: (see previous log 
entries)
at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1298)
at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1281)
at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:670)
at com.google.gwt.junit.client.GWTTestCase.runTest(GWTTestCase.java:421)
at junit.framework.TestCase.runBare(TestCase.java:141)
at junit.framework.TestResult$1.protect(TestResult.java:122)
at junit.framework.TestResult.runProtected(TestResult.java:142)
at junit.framework.TestResult.run(TestResult.java:125)
at junit.framework.TestCase.run(TestCase.java:129)
at com.google.gwt.junit.client.GWTTestCase.run(GWTTestCase.java:247)
at junit.framework.TestSuite.runTest(TestSuite.java:255)
at junit.framework.TestSuite.run(TestSuite.java:250)
at junit.framework.TestSuite.runTest(TestSuite.java:255)
at junit.framework.TestSuite.run(TestSuite.java:250)
at 
org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:84)
at 
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264)
at 
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
at 
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
at 
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
at 
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)


Results :

Tests in error: 
  FooTest>GWTTestCase.run:247->GWTTestCase.runTest:421 » UnableToComplete 
(see p...
  FooTest>GWTTestCase.run:247->GWTTestCase.runTest:421 » UnableToComplete 
(see p...

Tests run: 2, Failures: 0, Errors: 2, Skipped: 0

[INFO] 
------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] 
------------------------------------------------------------------------
[INFO] Total time: 3.638 s
[INFO] Finished at: 2016-11-16T20:37:31+03:00
[INFO] Final Memory: 15M/225M
[INFO] 
------------------------------------------------------------------------
[ERROR] Failed to execute goal 
net.ltgt.gwt.maven:gwt-maven-plugin:1.0-rc-6:test (default) on project Foo: 
There are test failures.
[ERROR] 
[ERROR] Please refer to c:\temp\mvnSampleGwtApp\foo\target\surefire-reports 
for the individual test results.
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e 
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, 
please read the following articles:
[ERROR] [Help 1] 
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException


On Wednesday, November 16, 2016 at 7:13:35 PM UTC+3, Thomas Broyer wrote:
>
>
>
> On Wednesday, November 16, 2016 at 4:10:04 PM UTC+1, vitrums wrote:
>>
>> [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ WebApp 
>> ---
>> [INFO] Changes detected - recompiling the module!
>> [INFO] Compiling 5 source files to 
>> C:\temp\mvnSampleGwtApp\WebApp\target\WebApp-1.0-SNAPSHOT\WEB-INF\classes
>> [WARNING] error reading 
>> C:\Users\vitru\.m2\repository\ant\ant\1.6.5\ant-1.6.5.jar; invalid LOC 
>> header (bad signature)
>> [WARNING] error reading 
>> C:\Users\vitru\.m2\repository\com\ibm\icu\icu4j\50.1.1\icu4j-50.1.1.jar; 
>> invalid LOC header (bad signature)
>>
>
> Looks like you have corrupted JARs. Try re-downloading them (delete them 
> and re-run Maven) 
>

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