explicit /etc/hosts reference required on linux JMS clients?

[bghcm]

Hello all -

I have both linux and windows JbossMQ clients. The windows clients work perfectly, the linux clients work perfectly *IF the hostname of the client machine is explicitly referenced in /etc/hosts*. If I remove the hostname from /etc/hosts, the client is unable to connect and throws:

java.lang.Exception: org.jboss.mq.SpyJMSException: Cannot start a the client IL service; - nested throwable: (java.net.UnknownHostException: longhorns: longhorns)

For example, the client hostname is "longhorns" and its IP address is 192.168.0.102. The client works perfectly if /etc/hosts contains:

127.0.0.1 localhost
192.168.0.102 longhorns

However, if I remove the line "192.168.0.102 longhorns" then the UnknownHostException is thrown on the client when the client tries to open a new subscription.

This is a problem for systems that are DHCP clients because the IP cannot be put in /etc/hosts. It is potentially a problem with NAT, too.

I must be doing something wrong because I'm sure JBossMQ isn't intended to require this. Also, my windows machines are DHCP and do not reference their own IP address in their hosts files, and the client works well from these.

Any ideas appreciated-
BGH

Config:
jboss 3.2.3
java 1.4.2_04
client - linux rh 9 kernel 2.4.39 and winXP SP1
server - linux rh 9 kernel 2.4.20

[adrian.brock]

Try this recent modification:
http://cvs.sourceforge.net/viewcvs.py/jboss/jbossmq/src/main/org/jboss/mq/il/uil2/UILServerIL.java?r1=1.1.4.7&r2=1.1.4.8

It sounds like you have something wrong with your configuration if the DHCP/DNS
is not giving you a host<->ip mapping

Regards,
Adrian

[bghcm]

The problem was fixed by:

-Changing invocation layer to UIL2 from OIL
-Upgrading to 3.2.3 client files (mistakenly was using 3.2.1 on client and 3.2.3 on server)

Thanks for the help!