oracle12542故障原因,ORACLE连接问题.TNS-12542: TNS: 地址已被占用

发表人:davies | 发表时间: 2007年一月30日, 19:39

TNS-12542 Error When Executing Batch Jobs or in High Transaction Environment

The information in this document applies to:

Oracle Net Services - Version: 8.1.7.4 to 10.1.0.0

Microsoft Windows 2000

Microsoft Windows XP (64-bit Itanium)

Microsoft Windows (32-bit)

Errors

TNS-00512 "Address already in use"

TNS-12542 TNS:address already in use

TNS-12560 "TNS:protocol adapter error"

Symptoms

TNS-12542 errors in log files when executing batch jobs or in high transaction environments. Client trace files will show

CLIENT TRACE FILE:

================

(3752) [10-JUN-2004 15:20:50:899] niotns: Calling address:

(DESCRIPTION=(SOURCE_ROUTE=OFF)(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=tst81)(PORT=1526)))(CONNECT_DATA=(SID=sec)(SRVR=DEDICATED)(CID=(PROGRAM=c:windowssystem32inetsrvw3wp.exe)(HOST=SRVPDFTEST)(USER=userarchive))))

(3752) [10-JUN-2004 15:20:50:899] nscall: connecting...

(3752) [10-JUN-2004 15:20:50:899] nttgetport: port resolved to 1526

(3752) [10-JUN-2004 15:20:50:899] nttbnd2addr: looking up IP addr for host:tst81

(3752) [10-JUN-2004 15:20:50:899] nsopen: opening transport...

(3752) [10-JUN-2004 15:20:50:899] nttcnp: Validnode Table IN use; err 0x0

(3752) [10-JUN-2004 15:20:50:899] nttcni: trying to connect to socket 6628.

(3752) [10-JUN-2004 15:20:50:899] ntt2err: soc 6628 error - operation=1, ntresnt[0]=512, ntresnt[1]=48, ntresnt[2]=0

(3752) [10-JUN-2004 15:20:50:899] nserror: nsres: id=0, op=65, ns=12542,ns2=12560; nt[0]=512, nt[1]=48, nt[2]=0; ora[0]=0, ora[1]=0, ora[2]=0

(3752) [10-JUN-2004 15:20:50:899] nsopen: unable to open transport

(3752) [10-JUN-2004 15:20:50:899] nioqper: error from nscall

(3752) [10-JUN-2004 15:20:50:899] nioqper: nr err code: 0

(3752) [10-JUN-2004 15:20:50:899] nioqper: ns main err code: 12542

(3752) [10-JUN-2004 15:20:50:899] nioqper: ns (2) err code: 12560

(3752) [10-JUN-2004 15:20:50:899] nioqper: nt main err code: 512

(3752) [10-JUN-2004 15:20:50:899] nioqper: nt (2) err code: 48

(3752) [10-JUN-2004 15:20:50:899] nioqper: nt OS err code: 0

(3752) [10-JUN-2004 15:20:50:899] niqme: reporting NS-12542 error as ORA-12542

(3752) [10-JUN-2004 15:20:50:899] niomapnserror: returning error 12542

(3752) [10-JUN-2004 15:20:50:899] niotns: Couldn't connect, returning 12542

(432) [10-JUN-2004 15:20:50:899] nstimarmed: no timer allocated

SQLNET.LOG file:

=============

Fatal NI connect error 12542, connecting to:

(DESCRIPTION=(SOURCE_ROUTE=OFF)(ADDRESS=(PROTOCOL=TCP)(HOST=tst81)(PORT=1526))(CONNECT_DATA=(SID=sec)(SRVR=DEDICATED)(CID=(PROGRAM=c:windowssystem32inetsrvw

3wp.exe)(HOST=SRVPDFTEST)(USER=userarchive))))

VERSION INFORMATION:

TNS for 32-bit Windows: Version 9.2.0.1.0 - Production

Windows NT TCP/IP NT Protocol Adapter for 32-bit Windows: Version 9.2.0.1.0 - Production

Time: 10-JUN-2004 15:20:50

Tracing to file: E:oracleora92tempcli_1732.trc

Tns error struct:

nr err code: 0

ns main err code: 12542

TNS-12542: TNS:address already in use

ns secondary err code: 12560

nt main err code: 512

TNS-00512: Address already in use

nt secondary err code: 48

nt OS err code: 0

Cause

Problem is caused due to the fact that the free ports in the windows client has been exhausted and it is trying to make use of a port which is in TIME_WAIT state which gives the error TNS-12542: Address already in use.

Fix

There are 2 solutions available:

1.) Increase the free port range:

======================

Start Registry Editor (Regedt32.exe).

Locate the following key in the registry:

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParameters

On the Edit menu, click Add Value, and then add the following registry value:

Value Name: MaxUserPort Data Type: REG_DWORD Value: 65534

Valid Range: 5000-65534 (decimal) Default: 0x1388 (5000 decimal)

Description: This parameter controls the maximum port number used when an application requests any

available user port from the system. Normally, ephemeral (that is, short-lived) ports are allocated between the values of 1024 and 5000 inclusive.

2.) Decrease the value for TIME_WAIT state:

================================

TcpTimedWaitDelay (new in Windows NT versions 3.51 SP5 and later)

Key: TcpipParameters

Value Type: REG_DWORD - Time in seconds

Valid Range: 30-300 (decimal)

Default: 0xF0 (240 decimal)

Description: This parameter determines the length of time that a connection will stay in the TIME_WAIT state when being closed. While a connection is in the TIME_WAIT state, the socket paircannot be re- used. This is also known as the "2MSL" state, as by RFC the value should be twicethe maximum segment lifetime on the network. See RFC793 for further details.