Jakub,
On 5/7/25 3:26 PM, Jakub Królikowski wrote:
On Sat, Apr 29, 2017 at 12:01 PM Mark Thomas <ma...@apache.org> wrote:
On 28/04/17 17:00, Matt Cosentino wrote:
Yes, it's other folders within WEB-INF. I turned on the TldScanner
logging and it is definitely what is causing the delay. My situation
probably isn't very typical. The delay varies in my various web
applications, the worst being about 20 seconds. It all adds up
though, and every second counts when our sites are down.
There is a solution available but it is intended more for the embedded
use case rather than a standard Tomcat install. Using it in a standard
install would require (effectively) patching Tomcat.
The general idea would be to use the TldPreScanned class. That does
require all the TLDs to be listed in advance. On the plus side, no
scanning delay. On the down side, adding TLDs requires code changes.
Doing this with a standard Tomcat install requires changes to the
JasperInitializer (hence the patch). I don't think there is a pure
config way around that but I'll look into it.
A better solution would probably be to make it easier to plugin in a
custom TLDScanner - i.e. purely with config. If you'd like us to explore
this option we should re-open 61052 and adjust accordingly. I don't
think there is enough demand for filtering resource paths to make that
worth implementing.
One final thought. Are you running the web application from a WAR or an
expanded directory? (The latter would be faster).
Mark
Hello,
I reorganized the code of my web app and I moved all views (mainly .jsp
files) to WEB-INF/view folder.
This means that the WEB-INF/view folder is scanned recursively for TLD
files. And it takes some time...
I am very interested in using the TldPreScanned class, which I see has been
implemented.
How can it be used?
Looks like you just mention the class in your JarScanner element (which
probably doesn't exist, so you will have to add configuration to change
from the defaults).
https://tomcat.apache.org/tomcat-9.0-doc/config/jar-scanner.html
I think it would be very useful to have a feature in the Tomcat
configuration
to specify a custom class for scanning TLDs
or to skip specific folders from WEB-INF from scanning.
The above documentation shows that JarScanning is already completely
pluggable.
There is also
https://tomcat.apache.org/tomcat-9.0-doc/config/jar-scan-filter.html
-chris
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