Fatal NI connect error 12170

1  出现问题

alert.log

Fatal NI connect error 12170.

  VERSION INFORMATION:
        TNS for Solaris: Version 11.2.0.1.0 - Production
        TCP/IP NT Protocol Adapter for Solaris: Version 11.2.0.1.0 - Production
  Time: 17-JUL-2013 05:26:23
  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

2 原因

Thesetimeout related messages are mostly informationalinnature.  The messages indicate the specified client connection (identified by the'Client address:'details) has experienced a timeout.  The 'nt secondary err code'identifies the underlying network transport, such as (TCP/IP) timeout limits after a client has abnormally terminated the database connection.

The'nt secondary err code'translates to underlying network transport timeoutsfor the following Operating Systems:

For the Solaris system: nt secondary err code: 145:

#define ETIMEDOUT 145 /* Connection timed out */

For the Linux operating system: nt secondary err code: 110

ETIMEDOUT 110 Connection timed out

For the HP-UX system: nt secondary err code: 238:

ETIMEDOUT 238 /* Connection timed out */

For Windows based platforms: nt secondary err code: 60 (whichtranslates to Winsock Error: 10060)

Description:  A connection attempt failed because the connected party did not properly respond after a period oftime, or established connection failed because connected host has failed to respond.

The reason the messages are written to the alert log is related to the use of the new 11g Automatic Diagnostic

注：主要由于ADR（Automatic Diagnostic Repository）默认开启Oracle Net diagnostic，并在连接超时记录到了ALERT.LOG中。
3 解决方案

修改 sqlnet.ora :

DIAG_ADR_ENABLED = OFF

修改 listener.ora:

DIAG_ADR_ENABLED_ = OFF

   - Where the would be replaced with the actual name of the configured listener(s)inthe listener.ora configurationfile.  For example,ifthe listener name is'LISTENER', the parameter wouldread:

DIAG_ADR_ENABLED_LISTENER = OFF

-Reload or restart the TNS Listenerforthe parameter change to take effect.