Backup of local Oracle Database fails with "Final error: 0xe000846b - The resource could not be backed up because an error occurred while connecting to the Backup Exec for Windows Servers Remote Agent

Issue

When backing up Oracle Database which exists on the media server itself, the backup job sometimes fails with error given below.

Error

Error in the Backup job log:

Final error: 0xe000846b - The resource could not be backed up because an error occurred while connecting to the Backup Exec for Windows Servers Remote Agent.
Make sure that the correct version of the Remote Agent is installed and running on the target computer.
Final error category: Resource Errors

Remote Agent not detected on 'Name of Media Server'
V-79-57344-33861 - The media operation was terminated by the user.

Error in the bengine debug log from Backup Exec server:

ERROR: ndmpcSendRequest(): timeout waiting for reply from control connection
ERROR: ndmpSendRequest failed:
NDMPAgentConnector::SetupConnection: connectOpen failed on server 'Name of Media Server'.

Cause

NDMP communication between the Backup Exec processes may time out when system is too busy.

Solution

Follow the steps provided below on Backup Exec server:

1. Stop all Backup Exec services.

2. Open Registry Editor.

3. Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Backup Exec For Windows\Backup Exec\Engine\Agents and change the value of dword "NDMP connect open time out seconds" from 30 decimal to 120 decimal.

4. Start all Backup Exec services and re-run the backup job.

5. If the issue persists, increase the value of the above registry entry by 60 and re-try the backup. Increase the value till the issue is resolved.

Warning: Incorrect use of the Windows registry editor may prevent the operating system from functioning properly. Great care should be taken when making changes to a Windows registry. Registry modifications should only be carried-out by persons experienced in the use of the registry editor application. It is recommended that a complete backup of the registry and workstation be made prior to making any registry changes.