Christopher Schultz wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
André,
On 10/25/13, 7:18 AM, André Warnier wrote:
For example, a utility such as logrotate, in the sysadmin world, is
like a gift of God. Most server-like programs allow logrotate to
rotate their logfiles, compress old ones, remove even older ones,
etc. to keep things running smoothly over time. It's a simple
thing, but it saves many hours that would otherwise have to be
dedicated to monitoring and reacting to such repetitive
occurrences.
Tomcat, at this moment, does not really allow that.
It does, but it's not terribly obvious how to do it.
Here are some ways to do it:
1. Modify catalina.sh to pipe | instead of redirect >
2. Use "catalina.sh start | chronolog" or whatever
3. Configure logrotate to copy-and-truncate
4. Set CATALINA_OUT=/dev/null before launching
5. Set up a named pipe and set CATALINA_OUT to it before launching
(Plus have another process drain that pipe)
That is because there is no simple mechanism to tell Tomcat to
relinquish control of its current logfiles for a moment, short of
stopping Tomcat completely and restarting it (which interrupts the
service, sometimes for a significant amount of time).
What happens in httpd if I write a module that writes to stdout
instead of the proper httpd-provided logging mechanisms?
The module's stdout/stderr is redirected to the Apache error log.
So my request is simple (at least to express) : can someone among
the Tomcat luminaries not imagine a mechanism by which Tomcat
would, on request from an external program or script, do something
like the Apache httpd does during a "soft reload" : wait for the
current requests to terminate, close all logfiles and re-open them
? For example : there already exist a "shutdown port", and a bunch
of "Listeners". Could there not be a "logs rotate port" or a
"logrotate listener" ?
It seems like this could be done via the manager webapp.
I am not underestimating the possible difficulty of the task, and
probably tackling such an issue is ultimately less rewarding for a
developer than implementing the latest in webapp or HTTP
technology.
But many sysadmins worldwide would be grateful if this came to pass
and I am sure that it would do a great deal to increase the
popularity of Tomcat among them.
Honestly, the only time this is really a problem is when catalina.out
is filling-up with junk, right? It's always awkward when that happens.
Yes, but the point is : the sysadmins do not generally control the code of the
webapps.
They are just told to run them. And there are a lot of webapps that write to stdout.
That's precisely the case of the last OP who posted about this. But not only /his/
problem, by any means.
- -chris
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.15 (Darwin)
Comment: GPGTools - http://gpgtools.org
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/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=X+tw
-----END PGP SIGNATURE-----
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
