My Oracle Support Banner

Multiple 12537 connection errors seen in Network Sniffer from Server to Client(s) (Doc ID 1354660.1)

Last updated on JANUARY 24, 2020

Applies to:

Oracle Net Services - Version to [Release 8.1.7 to 11.2]
Information in this document applies to any platform.


When doing an analysis that involves the use of a "Network Sniffer" program (for example, Wireshark), there may be multiple Oracle "12537" errors showing up frequently between the Database Server and the Client machine(s) and this raises a concern.
This might be particularly noticeable with an Application Server that is making several connections to the Database Server.

However, when reviewing client and server logs (sqlnet or listener) no similar message is found especially in the frequent numbers that are showing in the sniffer trace.


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.