Skip to Main Content

Oracle Database Discussions

Announcement

For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle.com. Technical questions should be asked in the appropriate category. Thank you!

Fail to start service for RAC database CRS-5017 - ORA-12547

Zahoor AhmadJan 23 2026

We have a 2 NODE RAC and I have noticed that application connectivity is is only made with one node and the second node is kept on standby for failover

SERVICE1 =
(DESCRIPTION =
(ADDRESS =(PROTOCOL=TCP)(HOST=oracle-scan)(PORT=1521))
(CONNECT_DATA =
(SERVICE_NAME = service1)
(INSTANCE_NAME = racdb1)
(FAILOVER_MODE =
(BACKUP=service2)(TYPE=SELECT)(METHOD=PRECONNECT)
) ) )

SERVICE2 =
(DESCRIPTION =
(ADDRESS =(PROTOCOL=TCP)(HOST=oracle-scan)(PORT=1521))
(CONNECT_DATA =
(SERVICE_NAME = service2)
(INSTANCE_NAME = racdb2)
(FAIOVER_MODE =
(BACKUP=service1)(TYPE=SELECT)(METHOD=PRECONNECT)
) ) )

But right now I found that service1 is not running although the scan listener and vips are working fine.

when I try to

srvctl start service -d racdb -s service1

I get below error

PRCD-1133 : failed to start services service1 for database racdb
PRCR-1095 : Failed to start resources using filter ((NAME == ora.racdb.service1.svc) AND (TYPE == ora.service.type))
CRS-5017: The resource action "ora.racdb.service1.svc start" encountered the following error:
ORA-12547: TNS:lost contact
. For details refer to "(:CLSN00107:)" in "/home/u01/app/grid_base/diag/crs/oracledb01/crs/trace/crsd_oraagent_oracle.trc".

CRS-5017: The resource action "ora.racdb.service1.svc start" encountered the following error:
ORA-12547: TNS:lost contact
. For details refer to "(:CLSN00107:)" in "/home/u01/app/grid_base/diag/crs/oracledb02/crs/trace/crsd_oraagent_oracle.trc".

CRS-5017: The resource action "ora.racdb.service1.svc check" encountered the following error:
ORA-12547: TNS:lost contact
. For details refer to "(:CLSN00109:)" in "/home/u01/app/grid_base/diag/crs/oracledb01/crs/trace/crsd_oraagent_oracle.trc".

CRS-2674: Start of 'ora.racdb.service1.svc' on 'oracledb01' failed
CRS-5017: The resource action "ora.racdb.service1.svc check" encountered the following error:
ORA-12547: TNS:lost contact
. For details refer to "(:CLSN00109:)" in "/home/u01/app/grid_base/diag/crs/oracledb02/crs/trace/crsd_oraagent_oracle.trc".

CRS-2674: Start of 'ora.racdb.service1.svc' on 'oracledb02' failed
CRS-2632: There are no more servers to try to place resource 'ora.racdb.service1.svc' on that would satisfy its placement policy

now there is no RAC load balancing as service1 can not be started. I have check different help article the permissioin on the oracle binary is ok but still facing this issue.

Comments
Post Details
Added on Jan 23 2026
4 comments
96 views