Estou com com um problema na hora de criar um pool de conexão do banco MySql no glassfish. Assim que informou no Nome do Pool, seleciono o tipo do recurso e o driver do fornecedor e click para avançar aparece esta mensagem na WebAdmin do glassfish:
(Exception report
messageInternal Server Error
descriptionThe server encountered an internal error that prevented it from fulfilling this request.
exception
java.lang.IllegalStateException: getOutputStream() has already been called for this response
note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 4.1.1 logs.)
E no console do Java esta mensagem:(2016-01-07T11:47:26.951-0200|Grave: RAR8059: Exception while trying to find properties of class [ com.mysql.jdbc.jdbc2.optional.MysqlDataSource ], set log-level toFINE for more information, com.mysql.jdbc.jdbc2.optional.MysqlDataSource
2016-01-07T11:47:26.952-0200|Grave: RAR8059: Exception while trying to find properties of class [ com.mysql.jdbc.jdbc2.optional.MysqlDataSource ], set log-level toFINE for more information, com.mysql.jdbc.jdbc2.optional.MysqlDataSource
2016-01-07T11:47:27.206-0200|Advertência: StandardWrapperValve[FacesServlet]: Servlet.service() for servlet FacesServlet threw exception
java.lang.IllegalStateException: getOutputStream() has already been called for this response).