DCD Does Not Work Due To Issue On Firewall (Doc ID 2877995.1)

Last updated on APRIL 17, 2023

Applies to:

Symptoms

DCD(Dead Connection Detection) does not work and server processes count reduces after some time from 720 to 389 seen in ps data of OSWatcher.
Such server processes are identified by '(LOCAL=NO)'.

According to design, DCD packet should be regularly sent to client process in the interval of sqlnet.expire_time,
and gets acknoledgement from client:

Example:

Changes

Cause

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