ORA-12537: TNS: connection closed

Error: ORA-12537: TNS: connection closed.

Environment:

Oracle: 11.2.0.2

OS: LINUX 5.6

Environment: RAC

NODE1: 10.20.31.36

NODE2: 10.20.31.38

 

[Oracle @ ract1 ~] $ Sqlplussys/oracle@10.20.31.36: 1521/racdbas sysdba

SQL * Plus: Release 11.2.0.2.0 Production on Tue Jan 15 16:19:04 2013

Copyright (c) 1982,201 0, Oracle. All rights reserved.

ERROR:
ORA-12537: TNS: connection closed

 

Using the same listener, you can log on to the ASM instance.

[Oracle @ ract1 ~] $ Sqlplussys/oracle@10.20.31.36: 1521/+ ASMas sysdba

SQL * Plus: Release 11.2.0.2.0 Production on Tue Jan 15 16:32:29 2013

Copyright (c) 1982,201 0, Oracle. All rights reserved.

Connected:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0-64bit Production
With the Real Application Clusters and Automatic Storage Management options

SQL>

It's okay to log on to node 2.

[Oracle @ ract1 ~] $ Sqlplussys/oracle@10.20.31.38: 1521/racdbas sysdba

SQL * Plus: Release 11.2.0.2.0 Production on Tue Jan 15 16:33:46 2013

Copyright (c) 1982,201 0, Oracle. All rights reserved.

Connected:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0-64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

SQL>

 

Listener Configuration:

[Oracle @ ract1 admin] $ cat sqlnet. ora
# Sqlnet. ora. ract1 Network Configuration File:/grid/product/11.2.0/network/admin/sqlnet. ora. ract1
# Generated by Oracle configuration tools.

NAMES. DIRECTORY_PATH = (TNSNAMES, EZCONNECT)

ADR_BASE =/grid/app

# Tcp. validnode_checking = yes

[Oracle @ ract1 admin] $ cat listener. ora
LISTENER = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC) (KEY = LISTENER) # line added by Agent
# Listener. ora. ract1 Network Configuration File:/grid/product/11.2.0/network/admin/listener. ora. ract1
# Generated by Oracle configuration tools.

ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN1 = ON

ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER = ON

LISTENER_SCAN1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC) (KEY = LISTENER_SCAN1 ))
)
)

 

Listener status:

[Oracle @ ract1 ~] $ Lsnrctl status

LSNRCTL for Linux: Version 11.2.0.2.0-Production on 15-JAN-2013 16:40:42

Copyright (c) 1991,201 0, Oracle. All rights reserved.

Connecting to (ADDRESS = (PROTOCOL = tcp) (HOST =) (PORT = 1521 ))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.2.0-Production
Start Date 15-JAN-2013 16:06:59
Uptime 0 days 0 hr. 33 min. 43 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File/grid/product/11.2.0/network/admin/listener. ora
Listener Log File/grid/app/diag/tnslsnr/ract1/listener/alert/log. xml
Listening Endpoints Summary...
(DESCRIPTION = (ADDRESS = (PROTOCOL = ipc) (KEY = LISTENER )))
(DESCRIPTION = (ADDRESS = (PROTOCOL = tcp) (HOST = 10.20.31.36) (PORT = 1521 )))
(DESCRIPTION = (ADDRESS = (PROTOCOL = tcp) (HOST = 10.20.31.37) (PORT = 1521 )))
Services Summary...
Service "+ ASM" has 1 instance (s ).
Instance "+ ASM1", status READY, has 1 handler (s) for this service...
Service "racdb" has 1 instance (s ).
Instance "racdb1", status READY, has 1 handler (s) for this service...
Service "racdbXDB" has 1 instance (s ).
Instance "racdb1", status READY, has 1 handler (s) for this service...
The command completed successfully

 

The log for reporting ORA-12537: TNS: connection closed is as follows:

[Grid @ ract1 alert] $ pwd
/Grid/app/diag/tnslsnr/ract1/listener/alert
[Grid @ ract1 alert] $ cat log. xml
<Msg time = '2017-01-15T16: 43: 2013 + 08: 00' org_id = 'oracle 'comp_id = 'tnslsnr'
Type = 'unknown 'level = '16' host_id = 'ract1'
Host_addr = '10. ipv31.36 'version = '1'>
<Txt> 15-JAN-2013 16:43:01 * (CONNECT_DATA = (CID = (PROGRAM =) (HOST = ract1) (USER = grid) (COMMAND = status) (ARGUMENTS = 64) (SERVICE = LISTENER) (VERSION = 186647040) * status * 0
</Txt>
</Msg>
<Msg time = '2017-01-15T16: 43: 2013 + 08: 00' org_id = 'oracle 'comp_id = 'tnslsnr'
Type = 'unknown 'level = '16' host_id = 'ract1'
Host_addr = '10. ipv31.36 '>
<Txt> 15-JAN-2013 16:43:03 * (CONNECT_DATA = (SERVICE_NAME = racdb) (CID = (PROGRAM = sqlplus @ ract1) (HOST = ract1) (USER = oracle ))) * (ADDRESS = (PROTOCOL = tcp) (HOST = 10.20.31.36) (PORT = 47268) * establish * racdb * 12518
</Txt>
</Msg>
<Msg time = '2017-01-15T16: 43: 2013 + 08: 00' org_id = 'oracle 'comp_id = 'tnslsnr'
Type = 'unknown 'level = '16' host_id = 'ract1'
Host_addr = '10. ipv31.36 '>
<Txt> TNS-12518: TNS: listener cocould not hand off client connection
TNS-12547: TNS: lost contact
TNS-12560: TNS: protocol adapter error
TNS-00517: Lost contact
Linux Error: 32: Broken pipe
</Txt>
</Msg>
<Msg time = '2017-01-15T16: 43: 2013 + 08: 00' org_id = 'oracle 'comp_id = 'tnslsnr'
Type = 'unknown 'level = '16' host_id = 'ract1'
Host_addr = '10. ipv31.36 '>
<Txt> 15-JAN-2013 16:43:05 * service_update * racdb1 * 0
</Txt>
</Msg>

 

 

[Grid @ ract1 ~] $ Crs_stat-t
Name Type Target State Host
------------------------------------------------------------
Ora. BACKUP. dg ora... up. type ONLINE ract1
Ora. DATA. dg ora... up. type ONLINE ract1
Ora... FILE. dg ora... up. type ONLINE ract1
Ora... ER. lsnr ora... er. type ONLINE ract1
Ora... N1.lsnr ora... er. type ONLINE ract2
Ora. asm ora. asm. type ONLINE ract1
Ora. cvu ora. cvu. type ONLINE ract2
Ora. gsd ora. gsd. type OFFLINE
Ora... network ora... rk. type ONLINE ract1
Ora. Solaris ora. productname. type ONLINE ract2
Ora. ons ora. ons. type ONLINE ract1
Ora. racdb. db ora... se. type ONLINE ract1
Ora... SM1.asm application ONLINE ract1
Ora... T1.lsnr application ONLINE ract1
Ora. ract1.gsd application OFFLINE
Ora. ract1.ons application ONLINE ract1
Ora. ract1.vip ora... t1.type ONLINE ract1
Ora... SM2.asm application ONLINE ract2
Ora... T2.lsnr application ONLINE ract2
Ora. ract2.gsd application OFFLINE
Ora. ract2.ons application ONLINE ract2
Ora. ract2.vip ora... t1.type ONLINE ract2
Ora... ry. acfs ora... fs. type ONLINE ract1
Ora. scan1.vip ora... ip. type ONLINE ract2

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