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Connections Are Dropped or Rejected Intermittently on Windows 2003 with Service Pack 1 or 2 (Doc ID 429230.1)

Last updated on OCTOBER 12, 2016

Applies to:

Oracle Net Services - Version: to - Release: 9.2 to 10.2
z*OBSOLETE: Microsoft Windows Server 2003
This issue is limited to: Microsoft Windows Server 2003


Connections are dropped intermittently and / or new connections are rejected intermittently once Service Pack 1 for Windows 2003 is installed. LSNRCTL commands may also fail with TNS-12547 "Lost contact" or with TNS-12537 "Connection closed".

Listener traces show OS-level problems related to lack of buffer space :

[000098 12-APR-2007 16:35:14:453] ntt2err: entry 
[000098 12-APR-2007 16:35:14:453] ntt2err: soc 220 error - operation=5, ntresnt[0]=530, ntresnt[1]=55, ntresnt[2]=0 
[000098 12-APR-2007 16:35:14:453] ntt2err: exit 
[000098 12-APR-2007 16:35:14:453] nttmrd: exit 
[000098 12-APR-2007 16:35:14:453] nserror: entry 
[000098 12-APR-2007 16:35:14:453] nserror: nsres: id=3, op=68, ns=12570, ns2=12560; nt[0]=530, nt[1]=55, nt[2]=0; ora[0]=0, ora[1]=0, ora[2]=0



Windows Service Pack 1 (SP1) or 2 (SP2) has been installed recently, before problems started.


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