While using JBoss, and you have to fix your JDK for all programs by editing /usr/java/j2sdk1.4.2/jre/lib/security/java.security

and adding

networkaddress.cache.ttl=0

To watch the DNS queries as they happen on linux for debugging, tcpdump is your friend,

tcpdump udp port 53

tips from: http://www.ex-parrot.com/~pete/javaniggles.html

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