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Servlet Filter Priority

Since the filters are linked one after another, I cannot know when to delete the MDC / NDC information (log4j). What is the topmost servlet filter?

I have one defined inside deploy / jboss-portal-ha.sar / portal-server.war / WEB-INF / Web.xml and several others are distributed around the application server.

What is the priority rule in this case?

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Servlet filters are bound in the order in which they are defined in your web.xml and must be specific to each web application context, which is almost always synonymous with a web application archive (WAR).

Details around the exact order used (which takes into account both the <url-pattern> and <servlet-name> elements) are documented in the Java servlet specification in the section "SRV.6.2.4" Filter Configuration in a Web Application ", available for download http : //download.oracle.com/otndocs/jcp/servlet-2.5-mrel2-eval-oth-JSpec/ .

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