搭DG之ORA-12537: TNS:connection closed

记一次被“/”坑过程，此次坑说明数据库的工作是非常严谨的，不该多的空格不能多，不该有的/不能多，看似没什么问题，但有时会被坑惨

背景

搭建rac to 单实例+ASM的dataguard。配置好dg相关参数，tns等信息后准备发起duplicate。发现连接备库时报错了

报错信息

[oracle@hkbst-cendbn1 bakup]$ rman target sys/xxx  auxiliary sys/xxx@cenadg
Recovery Manager: Release 19.0.0.0.0 - Production on Sat Apr 30 16:34:19 2022
Version 19.14.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

connected to target database: CENDB (DBID=2601363460)
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00554: initialization of internal recovery manager package failed
RMAN-04006: error from auxiliary database: ORA-12537: TNS:connection closed
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在本地连接也会报一样的错：

[oracle@cmlc-adgcendb1 admin]$ sqlplus sys/xxx@10.200.***.***:1521/cenadg as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Sun May 1 15:01:02 2022
Version 19.14.0.0.0

Copyright (c) 1982, 2021, Oracle.  All rights reserved.

ERROR:
ORA-12537: TNS:connection closed
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静态监听配置

[grid@cmlc-adgcendb1 ~]$ cat /oracle/app/19c/grid/network/admin/listener.ora
#Backup file is  /oracle/app/grid/crsdata/cmlc-adgcendb1/output/listener.ora.bak.cmlc-adgcendb1.grid line added by Agent
# listener.ora Network Configuration File: /oracle/app/19c/grid/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = cenadg)
      (ORACLE_HOME = /oracle/app/oracle/product/19c/dbhome_1/)
      (SID_NAME = cenadg)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = cmlc-adgcendb1)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER=ON              # line added by Agent
VALID_NODE_CHECKING_REGISTRATION_LISTENER=ON            # line added by Agent

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监听状态

[grid@cmlc-adgcendb1 ~]$ lsnrctl status

LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 01-MAY-2022 14:57:48

Copyright (c) 1991, 2021, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=cmlc-adgcendb1)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 19.0.0.0.0 - Production
Start Date                01-MAY-2022 14:56:34
Uptime                    0 days 0 hr. 1 min. 14 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /oracle/app/19c/grid/network/admin/listener.ora
Listener Log File         /oracle/app/grid/diag/tnslsnr/cmlc-adgcendb1/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=cmlc-adgcendb1)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Services Summary...
Service "+ASM" has 1 instance(s).
  Instance "+ASM", status READY, has 1 handler(s) for this service...
Service "+ASM_DATA" has 1 instance(s).
  Instance "+ASM", status READY, has 1 handler(s) for this service...
Service "+ASM_FRA" has 1 instance(s).
  Instance "+ASM", status READY, has 1 handler(s) for this service...
Service "cenadg" has 2 instance(s).
  Instance "cenadg", status UNKNOWN, has 1 handler(s) for this service...
  Instance "cenadg", status BLOCKED, has 1 handler(s) for this service...
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tns配置

cenadg =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.200.***.***)(PORT = 1560))
    (LOAD_BALANCE = yes)
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = cenadg)
    )
  )
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tnsping cenadg是通的，一切看似正常，没能找出什么问题，单实例却是连不了

网上方法：

检查oracle文件权限

[grid@cmlc-adgcendb1 bin]$ ll oracle
-rwsr-s--x 1 grid oinstall 425960424 Apr 23 00:28 oracle

[oracle@cmlc-adgcendb1 bin]$ ll oracle
-rwsr-s--x 1 oracle asmadmin 449624824 Apr 23 00:48 oracle

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oracle权限是正确的，排除权限问题

最后解决办法：

修改监听配置，原有监听的ORACLE_HOME配置多了个/，配正确的ORACLE_HOME问题解决

[grid@cmlc-adgcendb1 ~]$ cat /oracle/app/19c/grid/network/admin/listener.ora
#Backup file is  /oracle/app/grid/crsdata/cmlc-adgcendb1/output/listener.ora.bak.cmlc-adgcendb1.grid line added by Agent
# listener.ora Network Configuration File: /oracle/app/19c/grid/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = cenadg)
      (ORACLE_HOME = /oracle/app/oracle/product/19c/dbhome_1)
      (SID_NAME = cenadg)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = cmlc-adgcendb1)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )
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