[Building Sakai] Tomcat 7.0.29+ adds a few minutes to startup

[Matthew Jones]

It seems like the alternative is to add *every* Sakai jar to this list
individually (probably a huge list) as it was suggested here [1].
"INFO: At least one JAR was scanned for TLDs yet contained no TLDs.
Enable debug logging for this logger for a complete list of JARs that
were scanned but no TLDs were found in them. Skipping unneeded JARs
during scanning can improve startup time and JSP compilation time."

It was suggested changing the log level to debug would list every
individual jar. A comment on this post said that adding all of the
used taglibs to META-INF could also resolve this scanning problem, but
that looks like it could be a lot of work as well. Possibly something
to consider.

This seems like a great option for development (1 minute restart of
all tools is really nice) and also lowers the memory requirements
needed for startup (as a lot of memory is needed for this tag
scanning).

[1] http://thinkinginsoftware.blogspot.com/2011/10/tomcat-7-scans-all-jars-for-tlds.html

On Thu, Nov 1, 2012 at 11:10 AM, Earle Nietzel <earle.nietzel at gmail.com> wrote:
> In recent testing with the current tomcat version 7.0.32 I experienced 2 or
> 3 times longer startups of Sakai.
>
> Looking at the Tomcat change logs,
> http://tomcat.apache.org/tomcat-7.0-doc/changelog.html
> noticed in 7.0.29 they enabled scanning for servlet 3 features.
>
> This scan will scan all jars for servlet 3 annotations.
>
> They added an option to skip this scanning called: jarsToSkip
>
> Since Sakai at this point doesn't use Servlet 3 spec, that I can recall, you
> can configure it to skip all jars with adding *.jar to all of the
> *.jarsToSkip properties in conf/catalina.properties.
>
> My startup is now back to approx 65 seconds!
>
> Enjoy,
> Earle
>
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