Re: Why is JNDI so slow by nature
Gregg Wonderly <[email protected]> Tue, 26 May 2009 22:38:44 -0500
| Newsgroups | gmane.comp.java.sun.rmi |
|---|---|
| Message-ID | <[email protected]> |
I have seen this happen as well. I really believe that if he can get stack traces from the client JVMs that he'll know exactly what the problem is. Gregg Wonderly On May 26, 2009, at 10:16 PM, Niclas Hedhman wrote: > I would suspect that you are on a Windows network that is not happy > with DNS. This used to be a huge problem for me in the past. Related > to how Windows resolved computer names, first going through some WINS > resolver, and not hitting the DNS until after WINS timed out. Turning > WINS off and running on "DNS-only" networks was a solution I recall > worked. > > Cheers > Niclas > > On Wed, May 27, 2009 at 12:30 AM, Aleksander Bai <[email protected]> > wrote: >> Hi, >> >> >> >> And thanks for answering. >> >> Results when connection to server1 and server2 (both outside the >> local >> network): >> >> >> >> Start: 0 >> >> InitialContext : 0,049 >> >> Lookup: 6,972 >> >> >> >> Results when connection to localhost: >> >> >> >> Start: 0 >> >> InitialContext : 0,083 >> >> Lookup: 0,316 >> >> >> >> Pinging server1 and server2 takes about 19-20ms. >> >> >> >> Any ideas or anything else I can test? >> >> >> >> Alex >> >> >> >> >> >> From: John Cohen [mailto:[email protected]] >> Sent: 26. mai 2009 17:58 >> To: [email protected] >> Subject: Fwd: Why is JNDI so slow by nature >> >> >> >> >> >> ---------- Forwarded message ---------- >> From: John Cohen <[email protected]> >> Date: Tue, May 26, 2009 at 11:55 AM >> Subject: Re: Why is JNDI so slow by nature >> To: Gregg Wonderly <[email protected]> >> >> >> Hey, your email is not clear to me. >> You mentioned that you tested with different Application Servers >> and the >> server connection was not the problem... >> >> Can you run the below code using different application servers and >> let me >> know the output. >> >> >> import javax.naming.Context; >> import javax.naming.InitialContext; >> import java.util.Collection; >> import java.util.Properties; >> >> public class ClientLoginDemo { >> >> public static void login() throws Exception { >> printTime("Start application: "); >> >> Properties env = new Properties(); >> env.setProperty(Context.INITIAL_CONTEXT_FACTORY, >> "org.jnp.interfaces.NamingContextFactory"); >> >> // Your server here. in your case will be: serverURL >> env.setProperty(Context.PROVIDER_URL, "jnp://localhost: >> 1099/"); >> >> >> printTime("InitialContext start"); >> >> InitialContext context = new InitialContext(env); >> >> printTime("InitialContext stop"); >> >> >> >> printTime("Lookup start"); >> >> ILoader loader= (ILoader)context.lookup("Platform/remote"); >> >> printTime("Lookup stop"); >> >> >> >> } >> >> public static void main(String[] args) throws Exception { >> ClientLoginDemo.login(); >> >> >> } >> >> } >> >> >> >> On Fri, May 22, 2009 at 12:09 PM, Gregg Wonderly >> <[email protected]> wrote: >> >> Distributed Garbage Collection (DGC) can often play a part in these >> delays >> by creating additional calls to the remote VM to check on liveness >> of the >> object. If you can, I'd suggest using stack dumps to asses where in >> the call >> chain things are at when these delays occur. That should give you >> a lot >> more information about what is actually going on. >> >> Gregg Wonderly >> >> >> >> Aleksander Bai wrote: >> >> Hi, >> >> We have an environment with Jboss (running ejbs) and a standalone >> application. >> >> To connect we use JNDI, but it's quite slow (averaging around 7 >> seconds, but >> depending on the connection site's internet speed it can be as long >> as 30 >> seconds). This does not happen running the (jboss) server localhost >> (obviously). >> We've tried with several servers. There isn't a problem with the >> server >> connections, because both apache and ssh connects under less than a >> second. >> >> The Context is configured like this: >> >> Hashtable<String, String> env = new Hashtable<String, String>(); >> env.put(InitialContext.INITIAL_CONTEXT_FACTORY, >> "org.jnp.interfaces.NamingContextFactory"); >> env.put(InitialContext.URL_PKG_PREFIXES, >> "org.jboss.naming:org.jnp.interfaces"); >> env.put(InitialContext.PROVIDER_URL, serverURL); >> env.put("jnp.timeout", "10000"); >> env.put("jnp.sotimeout", "5000"); >> >> final ILoader platformLoader = (ILoader) ctx.lookup("Platform/ >> remote"); >> >> >> Is JDNI slow by nature, or is it a configurable thing? Can jboss >> play a part >> in this role? >> >> >> Hope this is the correct place to ask for help. :) >> >> Best regards, >> Alex >> >> = >> = >> = >> = >> = >> = >> ===================================================================== >> To unsubscribe, send email to [email protected] and include in >> the body >> of the message "signoff RMI-USERS". For general help, send email to >> [email protected] and include in the body of the message "help". >> >> For a list of frequently asked RMI questions please refer to: >> http://java.sun.com/j2se/1.3/docs/guide/rmi/faq.html >> >> To view past RMI-USERS postings, please see: >> http://archives.java.sun.com/archives/rmi-users.html >> >> >> = >> = >> = >> = >> = >> = >> ===================================================================== >> To unsubscribe, send email to [email protected] and include in >> the body >> of the message "signoff RMI-USERS". For general help, send email to >> [email protected] and include in the body of the message "help". >> >> For a list of frequently asked RMI questions please refer to: >> http://java.sun.com/j2se/1.3/docs/guide/rmi/faq.html >> >> To view past RMI-USERS postings, please see: >> http://archives.java.sun.com/archives/rmi-users.html >> >> >> >> >> >> >> = >> = >> = >> = >> = >> = >> ===================================================================== >> To unsubscribe, send email to [email protected] and include in >> the body >> of the message "signoff RMI-USERS". For general help, send email to >> [email protected] and include in the body of the message "help". >> >> For a list of frequently asked RMI questions please refer to: >> http://java.sun.com/j2se/1.3/docs/guide/rmi/faq.html >> >> To view past RMI-USERS postings, please see: >> http://archives.java.sun.com/archives/rmi-users.html >> > > > > -- > Niclas Hedhman, Software Developer > http://www.qi4j.org - New Energy for Java > > I live here; http://tinyurl.com/2qq9er > I work here; http://tinyurl.com/2ymelc > I relax here; http://tinyurl.com/2cgsug > > = > = > = > = > = > ====================================================================== > To unsubscribe, send email to [email protected] and include in > the body > of the message "signoff RMI-USERS". For general help, send email to > [email protected] and include in the body of the message "help". > > For a list of frequently asked RMI questions please refer to: > http://java.sun.com/j2se/1.3/docs/guide/rmi/faq.html > > To view past RMI-USERS postings, please see: > http://archives.java.sun.com/archives/rmi-users.html =========================================================================== To unsubscribe, send email to [email protected] and include in the body of the message "signoff RMI-USERS". For general help, send email to [email protected] and include in the body of the message "help". For a list of frequently asked RMI questions please refer to: http://java.sun.com/j2se/1.3/docs/guide/rmi/faq.html To view past RMI-USERS postings, please see: http://archives.java.sun.com/archives/rmi-users.html