Groovy script failed:
java.lang.IllegalStateException: zip file closed
	at java.util.zip.ZipFile.ensureOpen(ZipFile.java:669)
	at java.util.zip.ZipFile.getEntry(ZipFile.java:309)
	at java.util.jar.JarFile.getEntry(JarFile.java:240)
	at sun.net.www.protocol.jar.URLJarFile.getEntry(URLJarFile.java:128)
	at java.util.jar.JarFile.getJarEntry(JarFile.java:223)
	at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1042)
	at sun.misc.URLClassPath.getResource(URLClassPath.java:239)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:365)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at PostbuildActions.showCommittersInBuild(PostbuildActions.groovy:14)
	at PostbuildActions$showCommittersInBuild$0.call(Unknown Source)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
	at Script1.run(Script1.groovy:3)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:585)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:623)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:594)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SecureGroovyScript.evaluate(SecureGroovyScript.java:343)
	at org.jvnet.hudson.plugins.groovypostbuild.GroovyPostbuildRecorder.perform(GroovyPostbuildRecorder.java:362)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:744)
	at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:690)
	at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.post2(MavenModuleSetBuild.java:1073)
	at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:635)
	at hudson.model.Run.execute(Run.java:1752)
	at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:543)
	at hudson.model.ResourceController.execute(ResourceController.java:97)
	at hudson.model.Executor.run(Executor.java:429)