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From sri devops <sri.devop...@gmail.com>
Subject Re: Help with Tomcat Automatic Application Deployment
Date Wed, 16 May 2018 22:01:14 GMT
Thanks Mark, your answer is very helpful. I tried many scenarios using your
inputs.

I want Tomcat to NOT perform reload but it needs to perform a redeploy when
context.xml is changed. So i set autoDeploy=true and commented out below
section in context.xml to server my purpose.

<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>${catalina.base}/conf/web.xml</WatchedResources>

Now what i noticed is, while tomcat and application are in running state,
if i removed /opt/apache-tomcat-8.5.23/webapps/cp directory, Tomcat is
trying to redeploy which is good but it hung at below error

*SEVERE: The web application [cp] created a ThreadLocal with key of type
[java.lang.ThreadLocal] (value [java.lang.ThreadLocal@5640c1bb) and a value
of type [foo.context.ServiceToken] (value [Unknow] ) but failed to remove
it when the web application was stopped. Threads are going to be renewed
over time to try and avoid a probable memory leak.*

In order to get rid of this error, i manually need to stop / forcefully
kill PID for the tomcat and then start tomcat to perform a redeploy ---> So
here there's a human interaction of manually stopping tomcat and starting
it (not serving the purpose of redeploy). Do you have any thoughts or
suggestions in this scenarios ?

Thanks,
Srinath.


On Fri, May 11, 2018 at 11:44 AM Mark Thomas <markt@apache.org> wrote:

> On 08/05/18 19:07, sri devops wrote:
> >  Hello Team,
> >
> > Currently I have apache-tomcat-8.5.23 installed and running on
> > RHEL7.x86_64. I have a war deployed and application is running under
> > tomcat. While application is running, if i make any manual changes to
> some
> > config files [ context.xml or server.xml or web.xml] and noticed Tomcat
> is
> > restarting application even though I haven't called tomcat service start
> > script.
>
> Changes to server.xml do not trigger web application reload or redeploy.
> Neither does it trigger a Tomcat restart.
>
> Changes to web.xml trigger a web application reload because of the
> default watched resources (see CATALINA_BASE/conf/context.xml) and
> because autoDeploy is true by default.
>
> Changes to context.xml will trigger a web application redeploy because
> autoDeploy is true by default.
>
>
> > My intention is,
> > 1) At first when there's initial war deployed and tomcat service start
> > script is called, tomcat should extract war and app should work
> > 2) Second, While tomcat is in running state and application is running
> and
> > if i make any manual changes to any tomcat config file, I do not want
> > application to auto magically restart.
> >
> > *my server.xml looks as below*
> >
> > <Host name="localhost" appBase-"webapps"
> >            unpackWARs="true" autoDeploy="true">
> >
> >
> > I also looked at your docs and researched online, but unclear on these
> > parameters what to use when. [ setting autoDeploy=false (or) having
> > deployIgnore attribute somewhere ?]
>
> Set autoDeploy to false.
>
> Mark
>
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