Exception connec: java.sql.SQLException: Io exception: Connection refused(DESCRIPTION=(ERR=1153)(VSNNUM=0)(ERROR_STACK=(ERROR=(CODE=1153)(EMFI=4)(ARGS='(ADDRESS=(PROTOCOL=TCP)(HOST=ora-pre.coac.int)(PORT=1521))'))(ERROR=(CODE=305)(EMFI=1)))) Ha fallat la connexió a la base de dades