Marek Goldmann wrote:
> I'm encountered a strange error. When I bind JBoss instance to 0.0.0.0
> address instead of a fixed ethernet address, node gets registered in
> mod_cluster, shows in mod_cluster-manager, but every request to
> registered contexts throws 503 error.
>
> httpd error log:
>
> [Fri Aug 07 03:21:05 2009] [error] (111)Connection refused: proxy:
> ajp: attempt to connect to 0.0.0.0:8009 (0.0.0.0) failed
> [Fri Aug 07 03:21:05 2009] [error] ap_proxy_connect_backend disabling
> worker for (0.0.0.0)
> [Fri Aug 07 03:21:15 2009] [error] proxy: ajp: disabled connection for
> (0.0.0.0)
> [Fri Aug 07 03:21:25 2009] [error] proxy: ajp: disabled connection for
> (0.0.0.0)
>
> This looks like a bug for me, because many administrators are binding
> JBoss to 0.0.0.0.

The java side needs to understand that 0.0.0.0 is useless as a client address and send something useful. Trick is deciding what's useful.