如何解决Google App Engine ModifyThreadGroup问题不允许我使用DWR
|| 我在tomcat上正常运行的基本DWR代码在GAE中不起作用。根据http://groups.google.com/group/google-appengine-java/web/will-it-play-in-app-engine的说明，GAE支持dwr.3.0.0.RC1.jar。 我没有看到任何servlet参数来禁用DwrServlet中的线程（http://directwebremoting.org/dwr/documentation/server/configuration/servlet/index.html） 任何帮助表示赞赏。 谢谢 我得到的错误是runserver:
[java] 2011-06-06 15:18:19.144 java[1170:903] [Java CocoaComponent compatibility mode]: Enabled
[java] 2011-06-06 15:18:19.146 java[1170:903] [Java CocoaComponent compatibility mode]: Setting timeout for SWT to 0.100000
[java] Jun 6,2011 10:18:20 PM com.google.apphosting.utils.jetty.JettyLogger info
[java] INFO: Logging to JettyLogger(null) via com.google.apphosting.utils.jetty.JettyLogger
[java] Jun 6,2011 10:18:20 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
[java] INFO: Successfully processed /Users/mbustany/parents-portal/prototype/mo/geolocation-appengine/build/WEB-INF/appengine-web.xml
[java] Jun 6,2011 10:18:20 PM com.google.apphosting.utils.config.AbstractConfigXmlReader readConfigXml
[java] INFO: Successfully processed /Users/mbustany/parents-portal/prototype/mo/geolocation-appengine/build/WEB-INF/web.xml
[java] Jun 6,2011 10:18:20 PM com.google.apphosting.utils.jetty.JettyLogger info
[java] INFO: jetty-6.1.x
[java] Jun 6,2011 10:18:20 PM com.google.apphosting.utils.jetty.JettyLogger info
[java] INFO: Started SelectChannelConnector@localhost:8080
[java] Jun 6,2011 10:18:20 PM com.google.appengine.tools.development.DevAppServerImpl start
[java] INFO: The server is running at http://localhost:8080/
[java] Jun 6,2011 10:18:32 PM org.directwebremoting.impl.StartupUtil logStartup
[java] INFO: Starting: DwrServlet v3.0.0.116.rc1 on Google App Engine Development/1.5.0 / JDK 1.6.0_24 from Apple Inc. at
[java] Jun 6,2011 10:18:33 PM org.directwebremoting.impl.DefaultContainer invoke
[java] SEVERE: - Exception during auto-wire:
[java] java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
[java] at java.security.AccessControlContext.checkPermission(AccessControlContext.java:374)
[java] at java.security.AccessController.checkPermission(AccessController.java:546)
[java] at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
[java] at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:166)
[java] at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkAccess(DevAppServerFactory.java:191)
[java] at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:299)
[java] at java.lang.Thread.init(Thread.java:336)
[java] at java.lang.Thread.<init>(Thread.java:626)
[java] at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Executors.java:542)
[java] at java.util.concurrent.ThreadPoolExecutor.addThread(ThreadPoolExecutor.java:672)
[java] at java.util.concurrent.ThreadPoolExecutor.addIfUnderCorePoolSize(ThreadPoolExecutor.java:697)
[java] at java.util.concurrent.ThreadPoolExecutor.prestartCoreThread(ThreadPoolExecutor.java:1381)
[java] at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:222)
[java] at java.util.concurrent.ScheduledThreadPoolExecutor.scheduleWithFixedDelay(ScheduledThreadPoolExecutor.java:443)
[java] at org.directwebremoting.impl.PurgingDownloadManager.setScheduledThreadPoolExecutor(PurgingDownloadManager.java:71)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[java] at java.lang.reflect.Method.invoke(Method.java:597)
[java] at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:100)
[java] at org.directwebremoting.impl.DefaultContainer.invoke(DefaultContainer.java:282)
[java] at org.directwebremoting.impl.DefaultContainer.initializeBean(DefaultContainer.java:260)
[java] at org.directwebremoting.impl.DefaultContainer.setupFinished(DefaultContainer.java:177)
[java] at org.directwebremoting.impl.StartupUtil.setupDefaultContainer(StartupUtil.java:264)
[java] at org.directwebremoting.impl.StartupUtil.createAndSetupDefaultContainer(StartupUtil.java:188)
[java] at org.directwebremoting.servlet.DwrServlet.createContainer(DwrServlet.java:97)
[java] at org.directwebremoting.servlet.DwrServlet.init(DwrServlet.java:64)
[java] at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
[java] at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
[java] at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
[java] at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:58)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:94)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
[java] at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
[java] at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
[java] at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
[java] at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
[java] at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
[java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[java] at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:351)
[java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[java] at org.mortbay.jetty.Server.handle(Server.java:326)
[java] at org.mortbay.jetty.httpconnection.handleRequest(httpconnection.java:542)
[java] at org.mortbay.jetty.httpconnection$RequestHandler.headerComplete(httpconnection.java:923)
[java] at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
[java] at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
[java] at org.mortbay.jetty.httpconnection.handle(httpconnection.java:404)
[java] at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
[java] at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
[java] Jun 6,2011 10:18:33 PM org.directwebremoting.servlet.DwrServlet init
[java] SEVERE: init Failed
[java] org.directwebremoting.extend.ContainerConfigurationException: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
[java] at org.directwebremoting.impl.StartupUtil.createAndSetupDefaultContainer(StartupUtil.java:193)
[java] at org.directwebremoting.servlet.DwrServlet.createContainer(DwrServlet.java:97)
[java] at org.directwebremoting.servlet.DwrServlet.init(DwrServlet.java:64)
[java] at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
[java] at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
[java] at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
[java] at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:58)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:94)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
[java] at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
[java] at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
[java] at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
[java] at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
[java] at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
[java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[java] at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:351)
[java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[java] at org.mortbay.jetty.Server.handle(Server.java:326)
[java] at org.mortbay.jetty.httpconnection.handleRequest(httpconnection.java:542)
[java] at org.mortbay.jetty.httpconnection$RequestHandler.headerComplete(httpconnection.java:923)
[java] at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
[java] at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
[java] at org.mortbay.jetty.httpconnection.handle(httpconnection.java:404)
[java] at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
[java] at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
[java] Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
[java] at java.security.AccessControlContext.checkPermission(AccessControlContext.java:374)
[java] at java.security.AccessController.checkPermission(AccessController.java:546)
[java] at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
[java] at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:166)
[java] at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkAccess(DevAppServerFactory.java:191)
[java] at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:299)
[java] at java.lang.Thread.init(Thread.java:336)
[java] at java.lang.Thread.<init>(Thread.java:626)
[java] at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Executors.java:542)
[java] at java.util.concurrent.ThreadPoolExecutor.addThread(ThreadPoolExecutor.java:672)
[java] at java.util.concurrent.ThreadPoolExecutor.addIfUnderCorePoolSize(ThreadPoolExecutor.java:697)
[java] at java.util.concurrent.ThreadPoolExecutor.prestartCoreThread(ThreadPoolExecutor.java:1381)
[java] at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:222)
[java] at java.util.concurrent.ScheduledThreadPoolExecutor.scheduleWithFixedDelay(ScheduledThreadPoolExecutor.java:443)
[java] at org.directwebremoting.impl.DefaultScriptSessionManager.afterContainerSetup(DefaultScriptSessionManager.java:70)
[java] at org.directwebremoting.impl.AbstractContainer.callInitializingBeans(AbstractContainer.java:55)
[java] at org.directwebremoting.impl.AbstractContainer.callInitializingBeans(AbstractContainer.java:39)
[java] at org.directwebremoting.impl.DefaultContainer.setupFinished(DefaultContainer.java:180)
[java] at org.directwebremoting.impl.StartupUtil.setupDefaultContainer(StartupUtil.java:264)
[java] at org.directwebremoting.impl.StartupUtil.createAndSetupDefaultContainer(StartupUtil.java:188)
[java] ... 33 more
[java] Jun 6,2011 10:18:33 PM com.google.appengine.tools.development.ApiProxyLocalImpl log
[java] SEVERE: javax.servlet.ServletContext log: unavailable
[java] org.directwebremoting.extend.ContainerConfigurationException: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
[java] at org.directwebremoting.impl.StartupUtil.createAndSetupDefaultContainer(StartupUtil.java:193)
[java] at org.directwebremoting.servlet.DwrServlet.createContainer(DwrServlet.java:97)
[java] at org.directwebremoting.servlet.DwrServlet.init(DwrServlet.java:64)
[java] at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
[java] at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
[java] at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
[java] at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:58)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:94)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
[java] at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
[java] at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
[java] at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
[java] at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
[java] at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
[java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[java] at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:351)
[java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[java] at org.mortbay.jetty.Server.handle(Server.java:326)
[java] at org.mortbay.jetty.httpconnection.handleRequest(httpconnection.java:542)
[java] at org.mortbay.jetty.httpconnection$RequestHandler.headerComplete(httpconnection.java:923)
[java] at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
[java] at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
[java] at org.mortbay.jetty.httpconnection.handle(httpconnection.java:404)
[java] at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
[java] at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
[java] Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
[java] at java.security.AccessControlContext.checkPermission(AccessControlContext.java:374)
[java] at java.security.AccessController.checkPermission(AccessController.java:546)
[java] at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
[java] at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:166)
[java] at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkAccess(DevAppServerFactory.java:191)
[java] at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:299)
[java] at java.lang.Thread.init(Thread.java:336)
[java] at java.lang.Thread.<init>(Thread.java:626)
[java] at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Executors.java:542)
[java] at java.util.concurrent.ThreadPoolExecutor.addThread(ThreadPoolExecutor.java:672)
[java] at java.util.concurrent.ThreadPoolExecutor.addIfUnderCorePoolSize(ThreadPoolExecutor.java:697)
[java] at java.util.concurrent.ThreadPoolExecutor.prestartCoreThread(ThreadPoolExecutor.java:1381)
[java] at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:222)
[java] at java.util.concurrent.ScheduledThreadPoolExecutor.scheduleWithFixedDelay(ScheduledThreadPoolExecutor.java:443)
[java] at org.directwebremoting.impl.DefaultScriptSessionManager.afterContainerSetup(DefaultScriptSessionManager.java:70)
[java] at org.directwebremoting.impl.AbstractContainer.callInitializingBeans(AbstractContainer.java:55)
[java] at org.directwebremoting.impl.AbstractContainer.callInitializingBeans(AbstractContainer.java:39)
[java] at org.directwebremoting.impl.DefaultContainer.setupFinished(DefaultContainer.java:180)
[java] at org.directwebremoting.impl.StartupUtil.setupDefaultContainer(StartupUtil.java:264)
[java] at org.directwebremoting.impl.StartupUtil.createAndSetupDefaultContainer(StartupUtil.java:188)
[java] ... 33 more
[java]
[java] Jun 6,2011 10:18:33 PM com.google.apphosting.utils.jetty.JettyLogger warn
[java] WARNING: /dwr/engine.js
[java] org.directwebremoting.extend.ContainerConfigurationException: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
[java] at org.directwebremoting.impl.StartupUtil.createAndSetupDefaultContainer(StartupUtil.java:193)
[java] at org.directwebremoting.servlet.DwrServlet.createContainer(DwrServlet.java:97)
[java] at org.directwebremoting.servlet.DwrServlet.init(DwrServlet.java:64)
[java] at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
[java] at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
[java] at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
[java] at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:58)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:94)
[java] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[java] at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
[java] at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
[java] at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
[java] at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
[java] at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
[java] at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
[java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[java] at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:351)
[java] at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[java] at org.mortbay.jetty.Server.handle(Server.java:326)
[java] at org.mortbay.jetty.httpconnection.handleRequest(httpconnection.java:542)
[java] at org.mortbay.jetty.httpconnection$RequestHandler.headerComplete(httpconnection.java:923)
[java] at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
[java] at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
[java] at org.mortbay.jetty.httpconnection.handle(httpconnection.java:404)
[java] at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
[java] at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
[java] Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
[java] at java.security.AccessControlContext.checkPermission(AccessControlContext.java:374)
[java] at java.security.AccessController.checkPermission(AccessController.java:546)
[java] at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
[java] at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:166)
[java] at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkAccess(DevAppServerFactory.java:191)
[java] at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:299)
[java] at java.lang.Thread.init(Thread.java:336)
[java] at java.lang.Thread.<init>(Thread.java:626)
[java] at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Executors.java:542)
[java] at java.util.concurrent.ThreadPoolExecutor.addThread(ThreadPoolExecutor.java:672)
[java] at java.util.concurrent.ThreadPoolExecutor.addIfUnderCorePoolSize(ThreadPoolExecutor.java:697)
[java] at java.util.concurrent.ThreadPoolExecutor.prestartCoreThread(ThreadPoolExecutor.java:1381)
[java] at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:222)
[java] at java.util.concurrent.ScheduledThreadPoolExecutor.scheduleWithFixedDelay(ScheduledThreadPoolExecutor.java:443)
[java] at org.directwebremoting.impl.DefaultScriptSessionManager.afterContainerSetup(DefaultScriptSessionManager.java:70)
[java] at org.directwebremoting.impl.AbstractContainer.callInitializingBeans(AbstractContainer.java:55)
[java] at org.directwebremoting.impl.AbstractContainer.callInitializingBeans(AbstractContainer.java:39)
[java] at org.directwebremoting.impl.DefaultContainer.setupFinished(DefaultContainer.java:180)
[java] at org.directwebremoting.impl.StartupUtil.setupDefaultContainer(StartupUtil.java:264)
[java] at org.directwebremoting.impl.StartupUtil.createAndSetupDefaultContainer(StartupUtil.java:188)
[java] ... 33 more
<!DOCTYPE html>
<html lang=\"en\">
<head>
<title>Test</title>
<Meta http-equiv=\"Content-Type\" content=\"text/html; charset=us-ascii\"/>
<script type=\'text/javascript\' src=\'../dwr/engine.js\'></script>
<script type=\'text/javascript\' src=\'../dwr/util.js\'></script>
<script type=\'text/javascript\' src=\'../dwr/interface/IPAddress.js\'></script>
</head>
<body>
<p>
<input value=\"Fetch\" type=\"button\" onclick=\"fetch()\"/>
<br/>
Reply: <span id=\"ipaddress\"></span>
</p>
<script lang=\"javascript\">
function fetch() {
IPAddress.getDate(function(data) {
dwr.util.setValue(\"ipaddress\",data);
});
}
</script>
</body>
</html>
解决方法
如错误消息所暗示，您无法在App Engine中的线程上执行操作，包括
modifyThreadGroup
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