Connect to different host if one host/node is unavailable

[Lukáš 'Spike' Polívka]

If Coccinella tries to connect to the failed node, it spits out error message instead of trying another host.

After I pressed the login button again, it connected fine. Then I disconnected and Coccinella tried to connect to the failed node again and I got the same error.

Now both nodes are up, so I can't test further.

$ dig srv +short _xmpp-client._tcp.jabber.cz
5 0 5222 soumar.jabbim.cz.
5 0 5222 nezmar.jabbim.cz.

One of these nodes was down. When Coccinella “chose” the failed node to connect to, it just failed, instead of falling back to the working node.

[sander (s-devrieze)]

PS: this is about a clustered Jabber server with multiple nodes and using DNS SRV Records for all nodes.

[Mats (matsben)]

I must admit that I never thought about the case when there were multiple
DNS TXT records. My jlibdns seems to be adapted for multiple entries,
though:
% proc cb {args} {puts "---> $args"}
% jlib::dns::get_addr_port jabber.cz cb
::dns::1
% ---> {{soumar.jabbim.cz 5222} {nezmar.jabbim.cz 5222}}

[Mats (matsben)]

Fix now in cvs but the actual fallback mechanism is untested since I have no control of any server with DNS SRV records.