上周去给客户培训Oracle，讲到DG部分做实际配置演示的时候，碰到了ORA-28547故障，客户的数据库时11.2.0.1的版本，Window平台。
之前已经按照步骤把DG全部配置完成了，当准备在备库启用redo apply的时候，照例先检查一下两边远程归档路径是否有效：
# listener.ora Network Configuration File: D:\oracle\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
#CLRExtProc
#DIRECT_HANDOFF_TTC_LISTENER = OFF
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = orcl)
(ORACLE_HOME = D:\oracle\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:D:\oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
)
ADR_BASE_LISTENER = D:\oracle
tnsnames.ora
# tnsnames.ora Network Configuration File: D:\oracle\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
LISTENER_ORCL =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)
orcl =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
sqlnet.ora
# sqlnet.ora Network Configuration File: D:\oracle\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
Information in this document applies to any platform.
ORA-28547: connection to server failed, probable Oracle Net admin error
However, local BEQUEATH connections (without the Listener) work fine.
改变：
New installation or changes to an existing listener.ora file
For example, for a listener called LISTENER1 the following may be set for a "static" SID_LIST section:
(SID_LIST =
(SID_DESC =
(SID_NAME = ORCL1)
(ORACLE_HOME = E:\app\oracle\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:E:\app\oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")
)
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\app\oracle\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:E:\app\oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")
)
)
In the example above, the first section contains the SID_NAME and ORACLE_HOME values for the Database instance required for connection to.
However, it also contains a PROGRAM and an ENVS value which will also attach to client connections through the SID_NAME Value.
This can result in Oracle*Net connection errors such as ORA-28547.
These are ONLY for External Procedures and/or Heterogeneous Services (HS) Gateway use, which is as per the second section example and correctly used for that section.
ORA-28547: connection to server failed, probable Oracle Net admin error (文档 ID 1645680.1)
In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
APPLIES TO:
Oracle Net Services - Version 11.2.0.1 and later
Information in this document applies to any platform.
SYMPTOMS
When connecting through the Listener to a Database, an error is thrown:
ORA-28547: connection to server failed, probable Oracle Net admin error
However, local BEQUEATH connections (without the Listener) work fine.
CHANGES
New installation or changes to an existing listener.ora file
CAUSE
The listener.ora file's SID_LIST section may INCORRECTLY contain a "PROGRAM" line and/or an "ENVS" line for all database instances.
For example, for a listener called LISTENER1 the following may be set for a "static" SID_LIST section:
(SID_LIST =
(SID_DESC =
(SID_NAME = ORCL1)
(ORACLE_HOME = E:\app\oracle\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:E:\app\oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")
)
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\app\oracle\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:E:\app\oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")
)
)
In the example above, the first section contains the SID_NAME and ORACLE_HOME values for the Database instance required for connection to.
However, it also contains a PROGRAM and an ENVS value which will also attach to client connections through the SID_NAME Value.
This can result in Oracle*Net connection errors such as ORA-28547.
These are ONLY for External Procedures and/or Heterogeneous Services (HS) Gateway use, which is as per the second section example and correctly used for that section.
SOLUTION
To resolve this issue, make sure that if a static SID_LIST section is required, then it only contains the SID_NAME value and (if the instance is not in the same Home) the ORACLE_HOME value.
So edit the listener.ora file and remove any other values (unless directed by Oracle Support, such as inclusion of ENVS values specific to your instance).
In the above example, the corrected entry will be as follows:
(SID_LIST =
(SID_DESC =
(SID_NAME = ORCL1)
(ORACLE_HOME = E:\app\oracle\product\11.2.0\dbhome_1)
)
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\app\oracle\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:E:\app\oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")
)
)
Restart the Listener using "lsnrctl stop LISTENER1" and "lsnrctl start LISTENER1" (or via the Windows Services if on Windows).
