As I was getting this stack trace, it occurred to me what is probably happening. I think I was inadvertently using a class from org.gradle.internal and that's where the error is coming from:
Caused by: java.lang.ClassCastException: org.apache.tools.zip.ZipOutputStream cannot be cast to org.apache.tools.zip.ZipOutputStream at com.github.jengelman.gradle.plugins.shadow.tasks.ShadowCopyAction$1.execute(ShadowCopyAction.groovy) at org.gradle.internal.IoActions.withResource(IoActions.java:74) at org.gradle.internal.IoActions$withResource.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120) at com.github.jengelman.gradle.plugins.shadow.tasks.ShadowCopyAction.execute(ShadowCopyAction.groovy:49) at org.gradle.api.internal.file.copy.NormalizingCopyActionDecorator.execute(NormalizingCopyActionDecorator.java:52) at org.gradle.api.internal.file.copy.DuplicateHandlingCopyActionDecorator.execute(DuplicateHandlingCopyActionDecorator.java:42) at org.gradle.api.internal.file.copy.CopyActionExecuter.execute(CopyActionExecuter.java:38) at org.gradle.api.tasks.AbstractCopyTask.copy(AbstractCopyTask.java:65) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:63) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.doExecute(AnnotationProcessingTaskFactory.java:219) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:212) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:201) at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:533) at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:516) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61) ... 47 more -- John On Monday, April 28, 2014 at 5:51 PM, Adam Murdoch [via Gradle] wrote: > > On 29 Apr 2014, at 12:40 am, John Engelman <[hidden email] > (/user/SendEmail.jtp?type=node&node=5712626&i=0)> wrote: > > Hey everyone - > > I'm trying to write a plugin that uses the Apache ZipOutputStream class in > > it and I can't seem to get it to work. The class appears to be available > > via 'gradleApi()', but when I publish the plugin and install it to a > > project, I end up with a > > NoClassDefFoundException for ZipOutputStream. > > Then I explicitly added the org.apache.ant:ant dependency to the plugin and > > republished and now I get a ClassCastException: > > > > Caused by: java.lang.ClassCastException: > > org.apache.tools.zip.ZipOutputStream cannot be cast to > > org.apache.tools.zip.ZipOutputStream. > > Have you got a stack trace for this failure? > > -- > Adam Murdoch > Gradle Co-founder > http://www.gradle.org > VP of Engineering, Gradleware Inc. - Gradle Training, Support, Consulting > http://www.gradleware.com > > Join us for Gradle Summit 2014, June 12th and 13th in Santa Clara, CA: > http://www.gradlesummit.com > > > If you reply to this email, your message will be added to the discussion > below: > http://gradle.1045684.n5.nabble.com/Dealing-with-ClassLoader-issues-in-Gradle-Plugins-tp5712621p5712626.html > > To start a new topic under gradle-dev, email > ml-node+s1045684n1436218...@n5.nabble.com > (mailto:ml-node+s1045684n1436218...@n5.nabble.com) > To unsubscribe from gradle-dev, click here > (http://gradle.1045684.n5.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=1436218&code=am9obi5yLmVuZ2VsbWFuQGdtYWlsLmNvbXwxNDM2MjE4fDIyMTUyNjEzNQ==). > NAML > (http://gradle.1045684.n5.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml) > -- View this message in context: http://gradle.1045684.n5.nabble.com/Dealing-with-ClassLoader-issues-in-Gradle-Plugins-tp5712621p5712627.html Sent from the gradle-dev mailing list archive at Nabble.com.
