关于 Fatal NI connect error 12170

在 sqlnet.log 中错误如下：

Fatal NI connect error 12170.

VERSION INFORMATION:

TNS for Linux: Version 10.2.0.1.0 - Production

Oracle Bequeath NT Protocol Adapter for Linux: Version 10.2.0.1.0 - Production

TCP/IP NT Protocol Adapter for Linux: Version 10.2.0.1.0 - Production

Time: 29-NOV-2006 19:13:40

Tracing not turned on.

Tns error struct:

ns main err code: 12535

TNS-12535: TNS:operation timed out

ns secondary err code: 12560

nt main err code: 505

TNS-00505: Operation timed out

nt secondary err code: 110

nt OS err code: 0

Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=xxx.xxx.xxx.x)(PORT=19948))

# oerr tns 12170

12170, 00000, "TNS:Connect timeout occurred"

// *Cause: The server shut down because connection establishment or

// communication with a client failed to complete within the allotted time

// interval. This may be a result of network or system delays; or this may

// indicate that a malicious client is trying to cause a Denial of Service

// attack on the server.

// *Action: If the error occurred because of a slow network or system,

// reconfigure one or all of the parameters SQLNET.INBOUND_CONNECT_TIMEOUT,

// SQLNET.SEND_TIMEOUT, SQLNET.RECV_TIMEOUT in sqlnet.ora to larger values.

// If a malicious client is suspected, use the address in sqlnet.log to

// identify the source and restrict access. Note that logged addresses may

// not be reliable as they can be forged (e.g. in TCP/IP).

于是增大 sqlnet.ora 中的参数：

SQLNET.INBOUND_CONNECT_TIMEOUT = 30

SQLNET.RECV_TIMEOUT = 30

SQLNET.SEND_TIMEOUT = 30

在 listener.ora 增加：

INBOUND_CONNECT_TIMEOUT_LISTENER = 30

启动监听器：

srvctl start listener -n node_name



监控系统运行情况