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From Coty Sutherland <csuth...@redhat.com>
Subject Re: Tomcat graceful shutdown inquiry
Date Tue, 28 Jun 2016 19:05:48 GMT
Fantastic. Thanks! :)

On Tue, Jun 28, 2016 at 2:43 PM, Mark Thomas <markt@apache.org> wrote:
> On 28/06/2016 19:39, Coty Sutherland wrote:
>> Hello all,
>>
>> I've been poking around with the Fedora distribution of tomcat and
>> noticed that systemd isn't allowing tomcat to gracefully shutdown (it
>> sends an immediate SIGKILL after the Boostrap stop is called). That
>> isn't your issue, but in trying to mediate the issue so that session
>> persistence works as expected, I found that SIGTERM causes tomcat to
>> gracefully shutdown. Looking at the code of the
>> org.apache.catalina.startup.Bootstrap.stop() method, I can see that it
>> hands off to Server.stop() and stops the server by initiating the
>> shutdown hook, etc. When you send a SIGTERM to tomcat the
>> org.apache.catalina.core.StandardServer.stopInternal() method is what
>> handles shutdown and appears to be gracefully stopping the server,
>> though it goes about the process a bit differently.
>>
>> My question is, can anyone readily tell me the functional difference
>> between gracefully handling a SIGTERM and utilizing Bootstrap.stop()?
>
> None.
>
>> I'm sure that the Bootstrap.stop() is the preferred method,
>
> Not really.
>
>> but is there any major harm in using SIGTERM?
>
> No.
>
>> I've compared FINE level
>> logging on org.apache and both methods seem to get the same result (a
>> graceful stop).
>
> They are equivalent. If you disable the shutdown port, SIGTERM is the
> only way to gracefully shut down Tomcat.
>
> Mark
>
>
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