Hmmm....
The documentation says:
timeout |Timeout| Connection timeout in seconds. If not set the
Apache will wait until the free connection is available. This
directive is used for limiting the number of connections to the
backend server together with |max| parameter.
Yet the discussion thread at
http://marc.info/?l=apache-httpd-dev&m=117986243317037&w=2 seems to say
that "timeout" on the workers will be used as a connection and/or
request -- and then fallback to ProxyTimeout and finally to Timeout.
Essentially I'm looking to transform:
<Proxy balancer://ajpWorker>
BalancerMember ajp://localhost:8010 min=15 max=300 smax=30
ttl=900 keepalive=Off timeout=86400
</Proxy>
into something that will:
1. Wait essentially indefinitely for a response from a backend Tomcat
(e.g. up to a day 86400).
2. Wait up to a different time period, e.g. 180 seconds, to find a
worker rather than immediately returning a 503.
It's not at all clear to me how both are achieved in 2.2.4 and how both
will be achieved "shortly" when the changes discussed in the "Re:
ProxyTimeout does not work as documented" thread are backed into a 2.2.x
release (or if they will be).
--
Jess Holle
Rainer Jung wrote:
As I understand mod_proxy_* and APR code, the BalancerManager timeout
will set a timeout for individual read and write attempts to backend
connections.
So it neither correlates to an idle timeout on the connection (see ttl
and smax) neither to a request timeout in the sense of a limit to the
full request handling time.
The timeout starts whenever something is expected to get read or
written. So most of the times it should fire, when retrieving the
initial response packets takes longer than this timeout, or your
backend starts to hang in the middle of request processing.
Regards,
Rainer
Jess Holle wrote:
Currently one can specify timeout on one's BalancerMember (e.g. with
mod_proxy_ajp).
Does this serve as both a connection and request timeout? If so, in
the worst case I can use it to be both and thus set it for the latter
(knowing it is ridiculous for the former).
I read the "Re: ProxyTimeout does not work as documented
<http://marc.info/?l=apache-httpd-dev&m=117986243317037&w=2>" thread
and am trying to figure out how to set connection and request
timeouts for mod_proxy_ajp today with 2.2.4 -- and hopefully do so in
a manner that is compatible with the resolution of this thread...
--
Jess Holle
