ORA-04021: timeout occurred while waiting to lock object SYS.USER$ (Doc ID 2956046.1)

Last updated on JULY 20, 2024

Applies to:

Oracle Database - Enterprise Edition - Version 12.2.0.1 and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

Node connectivity issue nodes can not accept new connections.

The trace files shows the following:

Changes

Cause

	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.