According to Oracle the tag pooling is broken in Tomcat. I'm not sure tag pooling broken or are the BC4J tags from oracle broken. Url to oracle statement: http://otn.oracle.com/products/jdev/htdocs/readme_9031.html#juan Oracle states that the tag pool should call the release method either before the tag is put into the pool or after it is taken out of the pool and before it is used in the jsp page.
http://jakarta.apache.org/tomcat/faq/misc.html#tagbroken *** This bug has been marked as a duplicate of 16001 ***