ORA-28547: connection to server failed, probable Oracle Net admin error解决办法

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listener.ora是服务器端的配置oracle的文件。

后来将listener.ora的这一行 ：(PROGRAM = extproc) 注释掉，就行了
修改为：
SID_LIST_LISTENER =
  (SID_LIST =
  (SID_DESC =
  (SID_NAME = prod)
  (ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1)
# (PROGRAM = extproc)
  )
  )

LISTENER =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.8)(PORT = 1522))
  (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
  )
  )

PROGRAM = extproc 外部程序调用，现在已经没用了。