Hola Michael:
from Oracle Docs:
8<----------------------------------------------------------------------
----
TNS-12505 TNS:listener could not resolve SID given in connect descriptor
Cause: The SID in CONNECT_DATA was not found in the listener's tables.
Action: Check to make sure that the SID specified is correct. The SIDs
that are currently registered with the listener can be obtained by
typing "LSNRCTL SERVICES listener_name". These SIDs correspond to
SID_NAMEs in TNSNAMES.ORA, or DB_NAMES in the INIT.ORA file.
8<----------------------------------------------------------------------
----
> connectionURL="jdbc:oracle:thin:@HOSTNAME.DOMAIN.COM:1521:ORCL"
Perhaps the SID of your Database is not ORCL?
Saludos ,
Ignacio J. Ortega
