oracle11g - ORA-12528, TNS :listener: all appropriate instances are blocking new connections

Question

您好，当尝试通过数据连接详细信息创建存储库创建实用程序时，它抛出的异常是

Listener refused the connection with the following error:
ORA-12528, TNS:listener: all appropriate instances are blocking new connections

tnsnames.ora

XE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = sivanagendra-lap)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
    (UR = A)
    )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

ORACLR_CONNECTION_DATA = 
  (DESCRIPTION = 
    (ADDRESS_LIST = 
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1)) 
    ) 
    (CONNECT_DATA = 
      (SID = CLRExtProc) 
      (PRESENTATION = RO) 
    ) 
  ) 

请给我关于这个问题的解决方案。

Answer 1

可能的原因

1. 数据库是否处于受限模式？
2. 数据库没有安装吗？或者也许开始？如果是后者，则可能是暂时的问题 - 等到它完全启动。
3. 对于共享连接，可能是所有共享服务器都忙。对于专用连接，可能是 Processes 或 Sessions 参数太低。或者您可能遇到了一些操作系统限制/设置(例如 ulimits 之一)。