Thanks a lot Chris. Thanks,
Saurabh Tiwari 9158483338 On Wed, Jul 13, 2016 at 1:49 PM, chris derham <ch...@derham.me.uk> wrote: > > Hi There, > > > > We are about to upgrade from tomcat-7.0.65 to tomcat-8.0.XX. and this is > > regarding the loading of same JARs within the different application. to > > understand the scenario, consider below case > > > > Tomcat 8 --- > > webapps > > a.war--> lib--> spring.jar > > b.war--> lib--> spring.jar > > > > here b.war is just a copy of a.war and renamed just to differentiate > hence > > spring.jar is same for both the applications. > > > > My question is > > > > 1) will spring.jar loaded twice > > yes it will be loaded twice > > > 2) how to i make sure to load it only once ( if loaded twice) > > This question comes up frequently. Search the mailing list for shared > class loader to see the details. The upshot is that this can be done > using shared class loader, however there are real technical issues if > you do this - class cast exceptions, difficulty performing upgrades to > individual wars without taking down all of tomcat. The only positive > is that you might save a few MB of memory cost by having the same jar > loaded twice in memory. > > I've been on this mailing list for ~8 years, and every time this > issues comes up (about 5 times a year?), the tomcat developers suggest > that the proposed memory saving isn't not worth the problems that it > causes.. > > HTH > > Chris > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
