That is strange.  I use the older 6.x jetty maven plugin and the restarts
work well.  The stacktrace is not very helpful in this case.  You may have
more luck on a maven/jetty mailing list.



wild_oscar wrote:
> 
> Hi,
> 
> I'm developing using a Maven modular project (one module for the
> persistence layer, another for the webapp) and using the maven-jetty
> plugin in development.
> 
> However, I'm getting a strange error: when I make a change to the code
> jetty (version 7.0.0) automatically restarts (as it should). However, it
> throws the following error:
> 
> 2009-09-21 10:04:13.555::WARN:  EXCEPTION 
> java.lang.ClassNotFoundException:
> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
>       at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>       at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
>       at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
>       at
> org.codehaus.plexus.classworlds.realm.ClassRealm.loadRealmClass(ClassRealm.java:174)
>       at
> org.codehaus.plexus.classworlds.strategy.DefaultStrategy.loadClass(DefaultStrategy.java:67)
>       at
> org.codehaus.plexus.classworlds.strategy.ForeignStrategy.loadClass(ForeignStrategy.java:39)
>       at
> org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:201)
>       at
> org.codehaus.plexus.classworlds.strategy.DefaultStrategy.loadClass(DefaultStrategy.java:73)
>       at
> org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:201)
>       at
> org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:347)
>       at
> org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:300)
>       at org.eclipse.jetty.util.Loader.loadClass(Loader.java:90)
>       at org.eclipse.jetty.util.Loader.loadClass(Loader.java:70)
>       at org.eclipse.jetty.servlet.Holder.doStart(Holder.java:75)
>       at org.eclipse.jetty.servlet.FilterHolder.doStart(FilterHolder.java:58)
>       at
> org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:56)
>       at
> org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:667)
>       at
> org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:193)
>       at
> org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:923)
>       at
> org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:584)
>       at 
> org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:345)
>       at
> org.mortbay.jetty.plugin.JettyWebAppContext.doStart(JettyWebAppContext.java:89)
>       at
> org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:56)
>       at
> org.mortbay.jetty.plugin.JettyRunMojo.restartWebApp(JettyRunMojo.java:410)
>       at
> org.mortbay.jetty.plugin.JettyRunMojo$1.filesChanged(JettyRunMojo.java:373)
>       at org.eclipse.jetty.util.Scanner.reportBulkChanges(Scanner.java:485)
>       at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:351)
>       at org.eclipse.jetty.util.Scanner.scan(Scanner.java:279)
>       at org.eclipse.jetty.util.Scanner$1.run(Scanner.java:231)
>       at java.util.TimerThread.mainLoop(Timer.java:512)
>       at java.util.TimerThread.run(Timer.java:462)
> 2009-09-21 10:04:13.557::WARN:  Failed startup of context
> jettywebappcont...@49b09282@49b09282/,file:/home/malmeida/workspaceGestaoDoc/gs-information/webinterface/src/main/webapp/,/home/malmeida/workspaceGestaoDoc/gs-information/webinterface/src/main/webapp
> javax.servlet.UnavailableException:
> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
>       at org.eclipse.jetty.servlet.Holder.doStart(Holder.java:81)
>       at org.eclipse.jetty.servlet.FilterHolder.doStart(FilterHolder.java:58)
>       at
> org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:56)
>       at
> org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:667)
>       at
> org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:193)
>       at
> org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:923)
>       at
> org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:584)
>       at 
> org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:345)
>       at
> org.mortbay.jetty.plugin.JettyWebAppContext.doStart(JettyWebAppContext.java:89)
>       at
> org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:56)
>       at
> org.mortbay.jetty.plugin.JettyRunMojo.restartWebApp(JettyRunMojo.java:410)
>       at
> org.mortbay.jetty.plugin.JettyRunMojo$1.filesChanged(JettyRunMojo.java:373)
>       at org.eclipse.jetty.util.Scanner.reportBulkChanges(Scanner.java:485)
>       at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:351)
>       at org.eclipse.jetty.util.Scanner.scan(Scanner.java:279)
>       at org.eclipse.jetty.util.Scanner$1.run(Scanner.java:231)
>       at java.util.TimerThread.mainLoop(Timer.java:512)
>       at java.util.TimerThread.run(Timer.java:462)
> [INFO] Restart completed at Mon Sep 21 10:04:13 WEST 2009
> 
> And it obviously fails restarting: I have to stop it and start it again.
> Has any of you experienced something similar and/or knows why this is
> happening?
> 
> Thank you,
> 
> Miguel
> 
> 

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