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The current system I am working on uses Tomcat 7.0 and Spring 3.1 the system is a collection of web apps that all have the same classpath in WEB-INF\lib, I am thinking of adding spring 3.1 to my tomcat\lib so that all the web apps have access to it. Is this safe to do with Spring 3.1?
Safe to add Spring 3.1 to the Tomcat main lib directory? Quite possibly. Good idea? Probably not; as the system administrator you’d be taking on the responsibility for ensuring that all the webapps can use that exact version of Spring (including all the issues that can crop up when you update things) because the webapps would not be able to override it to anything else. (To be fair, they could load classes from elsewhere that weren’t in the standard system version you’re proposing, but that’s likely to be an extremely bad idea as there would be problems with warring versions of the same library. That’s a very confusing situation to be in; avoid if at all possible!)