EM13c: Always-On Monitoring Fails To Start: "Error starting EMS: Unable to start the HTTP Server: null" OR Sync: "Error: Error during sync: null, see the Always-On Monitoring logs for more information." When Using Repository Database 12.2

(Doc ID 2326828.1)

Last updated on NOVEMBER 13, 2017

Applies to:

Enterprise Manager Base Platform - Version 13.2.0.0.0 and later
Information in this document applies to any platform.

Symptoms

Enterprise Manager Cloud Control 13.2 Always-On Monitoring 13.2.0.0.0

When the repository database is version 12.2 or higher, several AoM emsctl commands may fail including:

emsctl start
------------------------------------------------------------------
Starting Always-On Monitoring.
Waiting for process to start
Retrying...
Retrying...
Retrying...
Retrying...
Error starting EMS: Unable to start the HTTP Server: null

 

OR

emsctl sync
------------------------------------------------------------------
 Connecting to Always-On Monitoring repository.
Starting synchronization with EM.
Synchronizing with EM reposito
ry: sysman@<repository string>
Synchronizing Targets data.
Error: Error during sync: ORA-01450: maximum key length (6398) exceeded
, see the Always-On Monitoring logs for more information.

 

OR

emsctl enable_notification
------------------------------------------------------------------
Unable to communicate with Always-On Monitoring to: enable_notification. Ensure Always-On Monitoring is running in order to proceed.
 Connecting to Always-On Monitoring Repository.
Starting synchronization with Enterprise Manager.
Synchronizing with Enterprise Manager repository: sysman@<repository string>
Synchronizing Targets data.
Synchronizing Alerts and Availability data.
Synchronizing Notification Metadata data.
Synchronizing Target Metric Metadata data.
Error: Error during sync: null, see the Always-On Monitoring logs for more information.

ems.err shows an error like:

 

Changes

 

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms