Hello Ruben, could you tell us how you define the resource's list of variants?
Best regards, Thierry Boileau > Hi, > We tried with different versions of restlet (1.1-M1, 1.2-M1, 1.1.8) and we > are having the same problem. > we have a Resource. it make some access to a database. > when it has severall calls at same time, one or more of them fails and throw > an exception. We think it happens before entering into the Resource class, so > we think it can be a bug. > Here is the Stack trace > > GRAVE: Unhandled exception or error intercepted > java.util.ConcurrentModificationException > at > java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372) > at java.util.AbstractList$Itr.next(AbstractList.java:343) > at com.noelios.restlet.Engine.getPreferredVariant(Engine.java:704) > at org.restlet.data.ClientInfo.getPreferredVariant(ClientInfo.java:463) > at org.restlet.resource.Resource.getPreferredVariant(Resource.java:270) > at org.restlet.resource.Resource.handleGet(Resource.java:439) > at org.restlet.Finder.handle(Finder.java:353) > at org.restlet.Filter.doHandle(Filter.java:150) > at org.restlet.Filter.handle(Filter.java:195) > at org.restlet.Router.handle(Router.java:504) > at org.restlet.Filter.doHandle(Filter.java:150) > at org.restlet.Filter.handle(Filter.java:195) > at org.restlet.Router.handle(Router.java:504) > at org.restlet.Filter.doHandle(Filter.java:150) > at org.restlet.Filter.handle(Filter.java:195) > at org.restlet.Router.handle(Router.java:504) > at org.restlet.Filter.doHandle(Filter.java:150) > at com.noelios.restlet.StatusFilter.doHandle(StatusFilter.java:130) > at org.restlet.Filter.handle(Filter.java:195) > at org.restlet.Filter.doHandle(Filter.java:150) > at org.restlet.Filter.handle(Filter.java:195) > at com.noelios.restlet.ChainHelper.handle(ChainHelper.java:124) > at org.restlet.Component.handle(Component.java:673) > at org.restlet.Server.handle(Server.java:331) > at com.noelios.restlet.ServerHelper.handle(ServerHelper.java:68) > at > com.noelios.restlet.http.HttpServerHelper.handle(HttpServerHelper.java:147) > at > com.noelios.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:881) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) > at > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > at > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > at > org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198) > at > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > at > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > at > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > at > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) > at > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > at > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) > at > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > at > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929) > at > org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160) > at > org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) > at > org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) > at > org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) > at > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) > at java.lang.Thread.run(Thread.java:619) > > > Regards > R.Hernando > > ------------------------------------------------------ > http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2449449 > > ------------------------------------------------------ http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2450523
