On request to Apache, mod_webkit [in mod_webkit.c/wksock_open()] complains:
"Can not open socket connection to WebKit AppServer"
and [in mod_webkit.c/webkit_handler()]:
"Couldn't connect to AppServer, attempt 1 or 10, sleeping 1 second(s)"
and after another 9 rounds of that with a final
"...-- giving up"
Normal-ish configurations, specifically in httpd.conf:
<Location /AB>
WKServer localhost 9999
SetHandler webkit-handler
</Location>
The problem:
apr_sockaddr_info_get() for 'localhost' creates an IPv6 socket on
[::1]:9999
Config: WebWare 0.8.1, mod_webkit2, Apache 2.0.48, on SuSE 8.1 (2.4.19) It's
an IPv4/v6 transition host; the DNS returns no IPv6 info, but the IFs
support v6. I operate no encapsulated IPv6, no IPv4-mapped v6, but do
operate v6--v6 services.
The easy fix:
Don't use "localhost" in httpd.conf; substitute 127.0.0.1 (or your
defined loopback).
(And for some configurations, could require a similar modification of the
default in [mod_webkit.c/webkit_create_dir_config()]. )
The better fix (for my environment):
To the calls to apr_sockaddr_info_get(), add APR_IPV4_ADDR_OK
My patch:
103c103
< err = apr_sockaddr_info_get(&apraddr,
(char*)apr_pstrdup(cmd->server->process->pool, cfg->host), APR_UNSPEC,
cfg->port, 0, cmd->server->process->pool);
---
> err = apr_sockaddr_info_get(&apraddr,
> (char*)apr_pstrdup(cmd->server->process->pool, cfg->host), APR_UNSPEC,
cfg->port, APR_IPV4_ADDR_OK, cmd->server->process->pool);
179c179
< rv=apr_sockaddr_info_get(&apraddr, cfg->host,APR_UNSPEC, cfg->port, 0,
p);
---
> rv=apr_sockaddr_info_get(&apraddr, cfg->host,APR_UNSPEC,
> cfg->port, APR_IPV4_ADDR_OK, p);
A further suggestion, if I may: Given the variety of challenges upcoming in
this area, might it be appropriate to fortify the error messages related to
these failures? For instance in mod_webkit and in ThreadedAppServer? E.g.,
with apr_sockaddr_t information?
Thanks for a promising tool.
Best,
--Nick
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