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New Connections Intermittently Rejected with TNS-12525 (Doc ID 566886.1)

Last updated on FEBRUARY 16, 2021

Applies to:

Oracle Net Services - Version 12.1.0.2 and later
Information in this document applies to any platform.
***Checked for relevance on 20-DEC-2013***



Symptoms

At regular intervals (every three hours), you see new connections rejected with TNS-12525 "listener has not received client's request in time allowed".

The listener log shows the following error stack :


Wireshark (Ethereal) traces show the TCP 3-way handshake never completes for those connections.

Changes

Value of idle timer was recently changed at firewall level.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References

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