We got a serious and mysterious problem: Recently we switched from JBoss 2.4.3 to JBoss 4.0.3SP1. Our tests were fine and we shipped our product with JBoss 4 to our customers. All customers are happy with the new release except one. This one customer reported performance problems (The problems are not reproducible in our test systems and other customers do not have these performance problems).
After a lot of searching we found a delay in communication between client and server. This delay happens when doing a Context lookup to get a reference to an EJB from JNDI and when calling #create() on an EJBObject: On server side the request for creating an EJB instance is handled fast but it takes a while until the call returns on the client. We added a LogInterceptor an client and server side and these are typical log statements: | Client | | 17:05:34,339 [EjbHelper] - start: findRemoteObject(profi.util.dokument.ejb.DvLoaderEJBHome) | 17:05:41,168 [EjbHelper] - end: findRemoteObject(profi.util.dokument.ejb.DvLoaderEJBHome) | 17:05:41,168 [EjbHelper] - #createSessionBean start DE.data_experts.profi.util.dokument.ejb.DvLoaderEJBHome.create() | 17:05:41,168 [ClientLogInterceptor] - cout => [1147187141168] DE.data_experts.profi.util.dokument.ejb.DvLoaderEJBHome.create() | 17:05:51,199 [ClientLogInterceptor] - cin => [1147187141168] DE.data_experts.profi.util.dokument.ejb.DvLoaderEJBHome.create() | 17:05:51,199 [EjbHelper] - #createSessionBean end DE.data_experts.profi.util.dokument.ejb.DvLoaderEJBHome.create() | | Server | | 17:05:41,176 DEBUG [DE.data_experts.util] Compressing Socket Factory accepting connection @ port 4219 from adress /11.8.27.194 | 17:05:42,187 INFO [LogInterceptor] in => [1147187141168] DE.data_experts.profi.util.dokument.ejb.DvLoaderEJBHome.create() | 17:05:42,187 INFO [LogInterceptor] out => [1147187141168] DE.data_experts.profi.util.dokument.ejb.DvLoaderEJBHome.create() | (What you see are logs for retrieving an EJB: #findRemoteObject does a JNDI lookup. After getting an object from JNDI #create is called on this object.) Calling an action on an obtained EJB is on the other hand really fast - just a few milliseconds are gone by. | Client | | 17:05:51,199 [ClientLogInterceptor] - cout => [1147187151199] DE.data_experts.profi.util.dokument.ejb.DvLoaderEJB.getDokumentartClasses() | 17:05:53,089 [ClientLogInterceptor] - cin => [1147187151199] DE.data_experts.profi.util.dokument.ejb.DvLoaderEJB.getDokumentartClasses() | | Server | | 17:05:53,041 INFO [org.jboss.ejb.plugins.LogInterceptor] in => [1147187151199] DE.data_experts.profi.util.dokument.ejb.DvLoaderEJB.getDokumentartClasses() | 17:05:53,042 INFO [org.jboss.ejb.plugins.LogInterceptor] out => [1147187151199] DE.data_experts.profi.util.dokument.ejb.DvLoaderEJB.getDokumentartClasses() | | (The delay between client out and server in is a coincidence - but I am providing this for a full example.) So it seems that at doing JNDI lookup and getting an EJB instance we lost time on the net. Our customers checked his firewall configuration and said that all was fine. Yet our customer runs our product with JBoss 2 on the same machine as the JBoss 4 version and the delays are just appearing in the JBoss 4 system. Any hints what could cause such a delay? Robert PS: Is there a way to configure the range of ports used for RMI? It seems that the PooledInvoker uses a port range starting at 4000 - but it should use a higher lower limit (starting at 10.000). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3942480#3942480 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3942480 ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
