ORA-12528: TNS:listener: all appropriate instances are blocking new connections
LSNRCTL> status APPLE7
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ggdomain)(PORT=1522)))
STATUS of the LISTENER
------------------------
Alias APPLE7
Version TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date 20-JUN-2017 06:07:39
Uptime 0 days 0 hr. 37 min. 7 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/ggdomain/apple7/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ggdomain)(PORT=1522)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1522)))
Services Summary...
Service "APPLE7" has 1 instance(s).
Instance "APPLE7DR", status UNKNOWN, has 1 handler(s) for this service...
Service "APPLE7DR" has 2 instance(s).
Instance "APPLE7DR", status BLOCKED, has 1 handler(s) for this service...
Instance "apple7dr", status BLOCKED, has 1 handler(s) for this service...
The command completed successfully
How to overcome this?
Add (UR = A) in the TNSnames.ora
The (UR=A) clause for TNS connect strings has been created as an enhancement request.
TNSnames.ora
APPLE7DR =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.150)(PORT = 1522))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = apple7dr)
(UR = A)
)
)