Please respond to customer's comment about Glassfish:
http://confluence.atlassian.com/display/DOC/System+Requirements?focusedCommentId=166003953#comment-166003953

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Quoted from comment:

Sorry, but I find the reason for not supporting Glassfish rather spurious - based on a single user's comment on a JIRA issue about a suspected error which was minor in the first place. Glassfish has become a very popular open source JEE server with commercial support available from Sun.

Comment is by: David Tildesley