Exception: access denied (java.lang.RuntimePermission modifyThreadGroup) google app engine w. mongolab

Hi All,

I'm developing a web app that will be host on google app engine. I'm using Mongo database on mongoLab.

Anybody please help me with this exception I got from servlet (doGET):

java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)

at java.security.AccessControlContext.checkPermission(AccessControlContext.java:376)

at java.security.AccessController.checkPermission(AccessController.java:549)

at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)

at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:289)

at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkAccess(DevAppServerFactory.java:314)

at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:299)

at java.lang.Thread.init(Thread.java:336)

at java.lang.Thread.<init>(Thread.java:422)

at com.mongodb.Mongo$CursorCleanerThread.<init>(Mongo.java:761)

at com.mongodb.Mongo.<init>(Mongo.java:348)

at com.mongodb.MongoClient.<init>(MongoClient.java:192)

at com.app.examschedule.DBConnectionHelper.DefaultMonConnection(DBConnectionHelper.java:31)

at com.app.examschedule.DBConnectionHelper.insertMongoLab(DBConnectionHelper.java:138)

at com.app.examschedule.ExamScheduleServlet.doGet(ExamScheduleServlet.java:37)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)

at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:123)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:61)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)

at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)

at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)

at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)

at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)

at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)

at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:94)

at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:409)

at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

at org.mortbay.jetty.Server.handle(Server.java:326)

at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)

at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)

at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)

at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)

at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)

at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)

at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

Thanks.

Veronica

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