Ubuntu
tomcat6 package

  1. Bug #541520
  2. Comment #6

Comment 6 for bug 541520

Revision history for this message
Jason Brittain (jason-brittain) wrote :

Thierry:

There is part of this patch's change that may cause authbind to fail:

-# You may pass JVM startup parameters to Java here.
-#JAVA_OPTS="-Djava.awt.headless=true -Djava.net.preferIPv4Stack=true -Xmx128m"
+# You may pass JVM startup parameters to Java here. If unset, the default
+# options (-Djava.awt.headless=true -Xmx128m) will be used.
+#JAVA_OPTS="-Djava.awt.headless=true -Xmx128m"

Removing -Djava.net.preferIPv4Stack=true means that the JVM's network stack might default to IPv6, and in that case authbind will (seemingly mysteriously) fail. Authbind works only with IPv4. I think few users use IPv6 today. It might eventually get popular, and if it does, it would be a good idea if we're not always making software that defaults to IPv4. But, I think the default should be IPv4, especially when certain JDK bugs are encountered only when the JDK's startup switches do not specify IPv4. So, I'm proposing we add back the -Djava.net.preferIPv4Stack=true startup switch.