I'm facing similar problem. Migrating from gwt-2.4.0 to gwt-2.8.2 along with jdk1.6 migration to jdk1.8.
I've added the gwt-dev-2.8.2 dependency to the classpath/refid to the below construct, but the issue still persists.
<java fork="true" classname="com.google.gwt.dev.Compiler" failonerror="true">
<jvmarg value="-Xmx1500M" />
<arg value="-logLevel" /><arg value="DEBUG" />
<arg value="-war" /><arg value="build/site" />
<arg value="-gen" /><arg value="build/transient" />
<arg line="${gwt.args}" />
<arg value="com.xsoft.Vas" />
<classpath refid="my-comm-client.classpath" />
</java>
This is a part of the error message:
[java] Loading inherited module 'com.google.gwt.http.HTTP'
[java] Module location: jar:file:/C:/SOV/workspace/SOV/_libraries/gwt-2.8.2/gwt-user.jar!/com/google/gwt/http/HTTP.gwt.xml
[java] Loading inherited module 'com.google.gwt.user.Timer'
[java] Module location: jar:file:/C:/SOV/workspace/SOV/_libraries/gwt-2.8.2/gwt-user.jar!/com/google/gwt/user/Timer.gwt.xml
[java] [ERROR] Line 19: Unexpected exception while processing element 'source'
[java] java.lang.NoClassDefFoundError: org/apache/tools/ant/types/ZipScanner
[java] at com.google.gwt.dev.resource.impl.DefaultFilters.getScanner(DefaultFilters.java:240)
Thanks,
Michal
Dňa pondelok, 1. augusta 2016 20:21:52 UTC+2 Thomas Broyer napísal(a):