[jboss-user] [JNDI/Naming/Network] - slow lookup, delay 3 seconds

Hello Everybody, in our productive enviroment, we running a JBOSS 4.0.5 GA as server and JRE1.6.0.01 as clients. Since a few days, some clients take a long time for the first lookup to an EJB. We find out, that for each node in the cluster we takes down, the first lookup takes 3 seconds fewer. tcpdump with the last active node: 12:30:09.906709 IP W1OG304570.2051 > JBOSS-05.1099: S 3609508404:3609508404(0) win 64512 <mss 1460,nop,nop,sackOK> 12:30:09.907384 IP JBOSS-05.1099 > W1OG304570.2051: S 1701190293:1701190293(0) ack 3609508405 win 5840 <mss 1460,nop,nop,sackOK> 12:30:09.907432 IP W1OG304570.2051 > JBOSS-05.1099: . ack 1 win 64512 12:30:09.907726 IP JBOSS-05.1099 > W1OG304570.2051: P 1:5(4) ack 1 win 5840 12:30:09.908103 IP JBOSS-05.1784772193 > W1OG304570.2051: 355 proc-1651139939 12:30:09.908262 IP W1OG304570.2051 > JBOSS-05.1099: . ack 361 win 64153 12:30:09.988872 IP W1OG304570.2052 > JBOSS-05.1098: S 1598309292:1598309292(0) win 64512 <mss 1460,nop,nop,sackOK> 12:30:09.989133 IP JBOSS-05.1098 > W1OG304570.2052: S 1706430601:1706430601(0) ack 1598309293 win 5840 <mss 1460,nop,nop,sackOK> 12:30:09.989290 IP W1OG304570.2052 > JBOSS-05.1098: . ack 1 win 64512 12:30:12.985180 IP W1OG304570.2052 > JBOSS-05.1098: P 1:8(7) ack 1 win 64512 12:30:12.985231 IP JBOSS-05.1098 > W1OG304570.2052: . ack 8 win 5840 12:30:12.985501 IP JBOSS-05.1098 > W1OG304570.2052: P 1:20(19) ack 8 win 5840 12:30:12.986998 IP W1OG304570.2052 > JBOSS-05.1098: P 8:26(18) ack 20 win 64493 ... Switching from port 1099 to port 1100 doesn't matter. After the first lookup, it's running fast Seems to be a client problem, but we test this with identical clients installed by the same image. We also copied the jre-dir from a client without the problem to one with the problem, without any effect. any clues? Kind Regards. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4174214#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...