Build failed in Jenkins: nutch-trunk-maven #147

[Apache Jenkins Server]

See <https://builds.apache.org/job/nutch-trunk-maven/147/>

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Started by timer
Building remotely on solaris1 in workspace 
<https://builds.apache.org/job/nutch-trunk-maven/ws/>
hudson.util.IOException2: remote file operation failed: 
<https://builds.apache.org/job/nutch-trunk-maven/ws/> at 
hudson.remoting.Channel@e1d2db7:solaris1
        at hudson.FilePath.act(FilePath.java:784)
        at hudson.FilePath.act(FilePath.java:770)
        at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:742)
        at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:684)
        at hudson.model.AbstractProject.checkout(AbstractProject.java:1195)
        at 
hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:576)
        at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:465)
        at hudson.model.Run.run(Run.java:1409)
        at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:481)
        at hudson.model.ResourceController.execute(ResourceController.java:88)
        at hudson.model.Executor.run(Executor.java:238)
Caused by: java.io.IOException: Remote call on solaris1 failed
        at hudson.remoting.Channel.call(Channel.java:690)
        at hudson.FilePath.act(FilePath.java:777)
        ... 10 more
Caused by: java.lang.ClassFormatError: Failed to load 
javax.servlet.ServletException
        at 
hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:154)
        at 
hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:131)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
        at 
hudson.scm.SubversionWorkspaceSelector.syncWorkspaceFormatFromMaster(SubversionWorkspaceSelector.java:85)
        at 
hudson.scm.SubversionSCM.createSvnClientManager(SubversionSCM.java:822)
        at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:765)
        at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:752)
        at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2099)
        at hudson.remoting.UserRequest.perform(UserRequest.java:118)
        at hudson.remoting.UserRequest.perform(UserRequest.java:48)
        at hudson.remoting.Request$2.run(Request.java:287)
        at 
hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
        at java.util.concurrent.FutureTask.run(FutureTask.java:123)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:651)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:676)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.UnsupportedClassVersionError: Bad version number in .class 
file
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:466)
        at 
hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:152)
        ... 18 more