Hello all, I just set up a new database on a 2-node 10g RAC. There are already some other databases installed and running, with working failover. For the new db the TAF does not work. As far as I understand (newbie :( ), the following entries in tnsnames.ora should suffice: GWIT = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = o1.stgkk.sozvers.at)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = o2.stgkk.sozvers.at)(PORT = 1521)) (LOAD_BALANCE = yes) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = gwit.stgkk.sozvers.at) (FAILOVER_MODE = (TYPE = SELECT) (METHOD = BASIC) (RETRIES = 180) (DELAY = 5) ) ) ) GWIT1 = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = o1.stgkk.sozvers.at)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = gwit.stgkk.sozvers.at) (INSTANCE_NAME = gwit1) ) ) GWIT2 = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = o2.stgkk.sozvers.at)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = gwit.stgkk.sozvers.at) (INSTANCE_NAME = gwit2) ) ) LISTENERS_GWIT = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = o1.stgkk.sozvers.at)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = o2.stgkk.sozvers.at)(PORT = 1521)) ) My testing procedure (instructions from an Oracle support employee) is as follows: I open two separate sqlplus sessions to the same instance, in either of them I execute a long select, followed by a shutdown abort in the other session. The expected result is the select to continue running and finish gracefully on the second instance - but instead I receive "ORA-03113: end-of-file on communication channel". What am I missing? Any hints highly appreciated! Thanks, Steiermärkische Gebietskrankenkasse A-8011 Graz, Josef-Pongratz-Platz 1, http://www.stgkk.at Nora Bernhard OE Informationstechnologie - Systemadministration Tel: +43 (0) 316 8035 - 1349 Fax: +43 (0) 316 8035 - 661349 mailto:nora.bernhard@xxxxxxxxxxxxxxxx -- //www.freelists.org/webpage/oracle-l