GlassFish Server Open Source Edition is dual GPLv2 licensed with ClassPath Exception and CDDL. This means that you can use open source binaries in the production process. You can download it from glassfish.org
Here is a link to the license: http://glassfish.java.net/public/CDDL+GPL_1_1.html
Oracle GlassFish Server, on the other hand, is licensed commercially and includes support, fixes, and some additional features. You can download this from oracle.com/goto/glassfish.
John clingan
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