From: Bo Xu <bobxu1128_at_gmail.com>
Date: Mon, 26 Jul 2010 08:46:53 -0700 (PDT)
I found out it is because of different version of jersey. In Glassfish, I
installed jersey bundle 1.2. In the war I deployed, a mix of libs of 1.1.4
or 1.2 is enclosed. And somehow things were broken. After removing all 1.2
libs, now it seems to be working again.