WP/CP will not start, U00003590 UCUDB - DB error: '08006', 'IO Error: The Network Adapter could not establish the connection'

Products

• CA Automic Workload Automation - Automation Engine

Issue/Introduction

Not able to login to AWI with below error:
"Connection to the AE system not possible. No connection to the following CPs could be established"

WP log shows below error message:
20230830/132516.626 - 23       U00003545 UCUDB: Opening database ...
20230830/132516.706 - 23       U00003611 DB OPEN executed. Return code = '17002'
20230830/132516.707 - 23       U00003590 UCUDB - DB error: '08006', 'IO Error: The Network Adapter could not establish the connection', '170002', 'java.sql.SQLRecoverableException'
20230830/132516.708 - 23       U00032031 Error when connecting to Database
20230830/132516.728 - 28       U00003432 Termination of Server 'AUTOMIC#WP' initiated.

Environment

Release : 21.0.3

Cause

Database was down.

From the Automic Engine server not able to telnet to DB Server on port 1527 (in this case it is Oracle Default port).

Resolution

DBA brought up the database then all the Automic processes were up.
Able to login to AWI successfully.