unable to run comet sample code in java

Hi. I am trying to run Slideshow which is a comet sample code and i have downloaded it from here but when I am trying to run that sample code, I am getting following error at the time of deployment.

I am using Glassfish Server 3 & i have enabled the comet support.

SEVERE: WebModule[/slideshow]Error loading WebappClassLoader (delegate=true; repositories=WEB-INF/classes/) com.sun.grizzly.cometd.servlet.CometdServlet
java.lang.ClassNotFoundException: com.sun.grizzly.cometd.servlet.CometdServlet
        at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1519)
        at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1369)
        at org.apache.catalina.core.StandardWrapper.loadServletClass(StandardWrapper.java:1394)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1258)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1240)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5093)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:5380)
        at com.sun.enterprise.web.WebModule.start(WebModule.java:498)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:917)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:901)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:733)
        at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2000)
        at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1651)
        at com.sun.enterprise.web.WebApplication.start(WebApplication.java:109)
        at org.glassfish.internal.data.EngineRef.start(EngineRef.java:130)
        at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:269)
        at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:294)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:462)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
        at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:382)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:355)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:370)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1064)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:96)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1244)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1232)
        at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:459)
        at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:209)
        at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:168)
        at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
        at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:238)
        at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
        at com.sun.grizzly.comet.CometEngine.executeServlet(CometEngine.java:444)
        at com.sun.grizzly.comet.CometEngine.handle(CometEngine.java:308)
        at com.sun.grizzly.comet.CometAsyncFilter.doFilter(CometAsyncFilter.java:87)
        at com.sun.grizzly.arp.DefaultAsyncExecutor.invokeFilters(DefaultAsyncExecutor.java:171)
        at com.sun.grizzly.arp.DefaultAsyncExecutor.interrupt(DefaultAsyncExecutor.java:143)
        at com.sun.grizzly.arp.AsyncProcessorTask.doTask(AsyncProcessorTask.java:94)
        at com.sun.grizzly.http.TaskBase.run(TaskBase.java:193)
        at com.sun.grizzly.http.TaskBase.execute(TaskBase.java:175)
        at com.sun.grizzly.arp.DefaultAsyncHandler.handle(DefaultAsyncHandler.java:145)
        at com.sun.grizzly.arp.AsyncProtocolFilter.execute(AsyncProtocolFilter.java:204)
        at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
        at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
        at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
        at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
        at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
        at java.lang.Thread.run(Thread.java:619)

SEVERE: WebModule[/slideshow]PWC1396: Servlet /slideshow threw load() exception
java.lang.ClassNotFoundException: com.sun.grizzly.cometd.servlet.CometdServlet
        at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1519)
        at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1369)
        at org.apache.catalina.core.StandardWrapper.loadServletClass(StandardWrapper.java:1394)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1258)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1240)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5093)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:5380)
        at com.sun.enterprise.web.WebModule.start(WebModule.java:498)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:917)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:901)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:733)
        at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2000)
        at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1651)
        at com.sun.enterprise.web.WebApplication.start(WebApplication.java:109)
        at org.glassfish.internal.data.EngineRef.start(EngineRef.java:130)
        at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:269)
        at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:294)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:462)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
        at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:382)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:355)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:370)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1064)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:96)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1244)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1232)
        at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:459)
        at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:209)
        at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:168)
        at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
        at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:238)
        at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
        at com.sun.grizzly.comet.CometEngine.executeServlet(CometEngine.java:444)
        at com.sun.grizzly.comet.CometEngine.handle(CometEngine.java:308)
        at com.sun.grizzly.comet.CometAsyncFilter.doFilter(CometAsyncFilter.java:87)
        at com.sun.grizzly.arp.DefaultAsyncExecutor.invokeFilters(DefaultAsyncExecutor.java:171)
        at com.sun.grizzly.arp.DefaultAsyncExecutor.interrupt(DefaultAsyncExecutor.java:143)
        at com.sun.grizzly.arp.AsyncProcessorTask.doTask(AsyncProcessorTask.java:94)
        at com.sun.grizzly.http.TaskBase.run(TaskBase.java:193)
        at com.sun.grizzly.http.TaskBase.execute(TaskBase.java:175)
        at com.sun.grizzly.arp.DefaultAsyncHandler.handle(DefaultAsyncHandler.java:145)
        at com.sun.grizzly.arp.AsyncProtocolFilter.execute(AsyncProtocolFilter.java:204)
        at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
        at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
        at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
        at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
        at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
        at java.lang.Thread.run(Thread.java:619)

SEVERE: PWC1306: Startup of context /slideshow failed due to previous errors
SEVERE: ContainerBase.addChild: start: 
org.apache.catalina.LifecycleException: org.apache.catalina.LifecycleException: java.lang.ClassNotFoundException: com.sun.grizzly.cometd.servlet.CometdServlet
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:5389)
        at com.sun.enterprise.web.WebModule.start(WebModule.java:498)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:917)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:901)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:733)
        at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2000)
        at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1651)
        at com.sun.enterprise.web.WebApplication.start(WebApplication.java:109)
        at org.glassfish.internal.data.EngineRef.start(EngineRef.java:130)
        at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:269)
        at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:294)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:462)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
        at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:382)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:355)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:370)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1064)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:96)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1244)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1232)
        at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:459)
        at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:209)
        at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:168)
        at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
        at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:238)
        at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
        at com.sun.grizzly.comet.CometEngine.executeServlet(CometEngine.java:444)
        at com.sun.grizzly.comet.CometEngine.handle(CometEngine.java:308)
        at com.sun.grizzly.comet.CometAsyncFilter.doFilter(CometAsyncFilter.java:87)
        at com.sun.grizzly.arp.DefaultAsyncExecutor.invokeFilters(DefaultAsyncExecutor.java:171)
        at com.sun.grizzly.arp.DefaultAsyncExecutor.interrupt(DefaultAsyncExecutor.java:143)
        at com.sun.grizzly.arp.AsyncProcessorTask.doTask(AsyncProcessorTask.java:94)
        at com.sun.grizzly.http.TaskBase.run(TaskBase.java:193)
        at com.sun.grizzly.http.TaskBase.execute(TaskBase.java:175)
        at com.sun.grizzly.arp.DefaultAsyncHandler.handle(DefaultAsyncHandler.java:145)
        at com.sun.grizzly.arp.AsyncProtocolFilter.execute(AsyncProtocolFilter.java:204)
        at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
        at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
        at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
        at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
        at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
        at java.lang.Thread.run(Thread.java:619)
Caused by: org.apache.catalina.LifecycleException: java.lang.ClassNotFoundException: com.sun.grizzly.cometd.servlet.CometdServlet
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5103)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:5380)
        ... 45 more
Caused by: java.lang.ClassNotFoundException: com.sun.grizzly.cometd.servlet.CometdServlet
        at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1519)
        at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1369)
        at org.apache.catalina.core.StandardWrapper.loadServletClass(StandardWrapper.java:1394)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1258)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1240)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5093)
        ... 46 more

WARNING: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: org.apache.catalina.LifecycleException: java.lang.ClassNotFoundException: com.sun.grizzly.cometd.servlet.CometdServlet
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: org.apache.catalina.LifecycleException: java.lang.ClassNotFoundException: com.sun.grizzly.cometd.servlet.CometdServlet
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:921)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:901)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:733)
        at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2000)
        at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1651)
        at com.sun.enterprise.web.WebApplication.start(WebApplication.java:109)
        at org.glassfish.internal.data.EngineRef.start(EngineRef.java:130)
        at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:269)
        at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:294)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:462)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
        at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:382)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:355)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:370)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1064)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:96)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1244)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1232)
        at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:459)
        at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:209)
        at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:168)
        at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
        at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:238)
        at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
        at com.sun.grizzly.comet.CometEngine.executeServlet(CometEngine.java:444)
        at com.sun.grizzly.comet.CometEngine.handle(CometEngine.java:308)
        at com.sun.grizzly.comet.CometAsyncFilter.doFilter(CometAsyncFilter.java:87)
        at com.sun.grizzly.arp.DefaultAsyncExecutor.invokeFilters(DefaultAsyncExecutor.java:171)
        at com.sun.grizzly.arp.DefaultAsyncExecutor.interrupt(DefaultAsyncExecutor.java:143)
        at com.sun.grizzly.arp.AsyncProcessorTask.doTask(AsyncProcessorTask.java:94)
        at com.sun.grizzly.http.TaskBase.run(TaskBase.java:193)
        at com.sun.grizzly.http.TaskBase.execute(TaskBase.java:175)
        at com.sun.grizzly.arp.DefaultAsyncHandler.handle(DefaultAsyncHandler.java:145)
        at com.sun.grizzly.arp.AsyncProtocolFilter.execute(开发者_如何学运维AsyncProtocolFilter.java:204)
        at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
        at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
        at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
        at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
        at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
        at java.lang.Thread.run(Thread.java:619)

SEVERE: Exception while invoking class com.sun.enterprise.web.WebApplication start method
java.lang.Exception: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: org.apache.catalina.LifecycleException: java.lang.ClassNotFoundException: com.sun.grizzly.cometd.servlet.CometdServlet
        at com.sun.enterprise.web.WebApplication.start(WebApplication.java:138)
        at org.glassfish.internal.data.EngineRef.start(EngineRef.java:130)
        at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:269)
        at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:294)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:462)
        at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
        at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:382)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:355)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:370)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1064)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:96)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1244)
        at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1232)
        at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:459)
        at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:209)
        at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:168)
        at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)
        at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:238)
        at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
        at com.sun.grizzly.comet.CometEngine.executeServlet(CometEngine.java:444)
        at com.sun.grizzly.comet.CometEngine.handle(CometEngine.java:308)
        at com.sun.grizzly.comet.CometAsyncFilter.doFilter(CometAsyncFilter.java:87)
        at com.sun.grizzly.arp.DefaultAsyncExecutor.invokeFilters(DefaultAsyncExecutor.java:171)
        at com.sun.grizzly.arp.DefaultAsyncExecutor.interrupt(DefaultAsyncExecutor.java:143)
        at com.sun.grizzly.arp.AsyncProcessorTask.doTask(AsyncProcessorTask.java:94)
        at com.sun.grizzly.http.TaskBase.run(TaskBase.java:193)
        at com.sun.grizzly.http.TaskBase.execute(TaskBase.java:175)
        at com.sun.grizzly.arp.DefaultAsyncHandler.handle(DefaultAsyncHandler.java:145)
        at com.sun.grizzly.arp.AsyncProtocolFilter.execute(AsyncProtocolFilter.java:204)
        at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
        at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
        at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
        at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
        at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
        at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
        at java.lang.Thread.run(Thread.java:619)

You are using V3... Sounds like you hit GLASSFISH-9728.

Try either upgrading to GF 3.1 or adding grizzly-cometd.jar and other dependencies to the GF V3 classpath. Check the bug report comments for the modified pom file if you wish to download dependencies from central maven repository.