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From "Boyle Owen" <Owen.Bo...@swx.com>
Subject RE: [users@httpd] Newbie Qu - details of graceful restart on Windows
Date Thu, 02 Jun 2005 07:20:54 GMT
> -----Original Message-----
> From: dhay@lexmark.com [mailto:dhay@lexmark.com]
> Sent: Mittwoch, 1. Juni 2005 18:17
> To: users@httpd.apache.org
> Subject: [users@httpd] Newbie Qu - details of graceful restart on
> Windows

Can you do a graceful restart on Windows?

On Unix, a graceful corresponds to sending a USR1 signal to the apache parent. This causes
the extant daemons to exit when they're finished and all new daemons to come up with the new
config. All the apache control methods use signals (restart = HUP, stop = TERM). 

On Windows, these signals don't exist and apache is controlled as a service. You have "apache
-k restart" but I'm not sure if that corresponds to a HUP or USR1. Either try it and let us
know, or maybe some Windows guru has a clearer idea.

Rgds,
Owen Boyle
Disclaimer: Any disclaimer attached to this message may be ignored. 

> 
> 
> 
> Hi,
> 
> I'm quite new to Apache, and trying to understand what a 
> graceful restart
> on Windows actually does.  I'm running Apache with mod_jk 
> with multiple
> Tomcats.  When we add a new Tomcat, I would like to update the
> workers.properties file and then restart Apache so the 
> changes take effect.
> 
> Would anybody be able to explain exactly what happens, or point me to
> documentation that already exists?  I've searched the mailing 
> lists and
> googled a lot, with not much detail.
> 
> My main concern is whether its possible for requests to be 
> dropped during
> this process, and whether session affinity is maintained - eg 
> if a browser
> is already talking to a certain Tomcat, will it continue to 
> talk to exactly
> that one after the restart?
> 
> Many thanks,
> 
> David
> 
> 
> 
> 
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