ORA-12541:TNS:no listener 解决方法

oracle安装目录

D:u01

前言

    客户端（IP01）需要访问服务端（IP02）的Oracle库ORCL。
    pl/sql 连接时报错ORA-12541:TNS:no listener

解决方法

    步骤一：配置客户端tnsnames.ora

D:u01apporacleproduct19.3.0networkadmintnsnames.ora

HOST要为正确的IP地址

# tnsnames.ora Network Configuration File: D:u01apporacleproduct19.3.0NETWORKADMINtnsnames.ora
# Generated by Oracle configuration tools.

LISTENER_ORCL =
  (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.61.232)(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 = 172.16.61.232)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

步骤二：配置服务端listener.ora

D:u01apporacleproduct19.3.0networkadminlistener.ora

同样的HOST要为正确的IP地址

# listener.ora Network Configuration File: D:u01apporacleproduct19.3.0NETWORKADMINlistener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:u01apporacleproduct19.3.0)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:u01apporacleproduct19.3.0binoraclr19.dll")
    )
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:u01apporacleproduct19.3.0)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:u01apporacleproduct19.3.0binoraclr19.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.61.232)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

还有一种办法就是用hosts文件的方式

C:windowssystem32driversetchosts文件

x.x.x.x  HOSTNAME

最后重启服务

步骤三：重启一下监听：lsnrctl stop、lsnrctl start

 cmd命令

lsnrctl stop、lsnrctl start重启监听

PS：附加环境变量配置