EM 12c: Enterprise Manager 12c Cloud Control Agent Will Not Upload after OMS Server Reboot with Error: Backend WLS or EM application seems to be down (Doc ID 1414863.1)

Last updated on OCTOBER 18, 2016

Applies to:

Enterprise Manager Base Platform - Version 12.1.0.1.0 and later
Information in this document applies to any platform.

Symptoms


The Enterprise Manager (EM) 12.1.0.1 Cloud Control Management (Central) Agent is not uploading after 12.1.0.1 OMS server restart. Both the OMS and the agent started up without error but the agent no longer uploads to the OMS.

Accessing the upload url shows this error:

Backend WLS or EM application seems to be down

[oracle@hostname:/home/oracle]$ $AGENT_HOME/bin/emctl upload agent
Oracle Enterprise Manager 12c Cloud Control 12.1.0.1.0
Copyright (c) 1996, 2011 Oracle Corporation. All rights reserved.
---------------------------------------------------------------
EMD upload error:full upload has failed: uploadXMLFiles skipped :: OMS version not checked yet. If this issue persists check trace files for ping to OMS related errors. (OMS_DOWN)

 

Unsecuring, securing, upload and pinging the OMS all fail:

Unsecure:
[oracle@hostname:/home/oracle]$ $AGENT_HOME/bin/emctl unsecure agent
Oracle Enterprise Manager 12c Cloud Control 12.1.0.1.0
Copyright (c) 1996, 2011 Oracle Corporation. All rights reserved.
EMD clearsudoprops completed successfully
Checking Agent for HTTP... Done.
Agent is already stopped... Done.
Unsecuring agent... Started.
OMS is locked. Cannot unsecure the Agent.
Unsecuring Agent... Failed.

Secure:
[oracle@hostname:/home/oracle]$ $AGENT_HOME/bin/emctl secure agent
Oracle Enterprise Manager 12c Cloud Control 12.1.0.1.0
Copyright (c) 1996, 2011 Oracle Corporation. All rights reserved.
Agent is already stopped... Done.
Securing agent... Started.
Enter Agent Registration Password :
Securing agent... Failed.

Ping:
[oracle@hostname:/home/oracle]$ $AGENT_HOME/bin/emctl pingOMS
Oracle Enterprise Manager 12c Cloud Control 12.1.0.1.0
Copyright (c) 1996, 2011 Oracle Corporation. All rights reserved.
---------------------------------------------------------------
EMD pingOMS error: OMS application is unavailable 

 

The OMS is unlocked:

[oracle@hostname:/home/oracle]$ $OMS_HOME/bin/emctl secure unlock
Oracle Enterprise Manager Cloud Control 12c Release 12.1.0.1.0
Copyright (c) 1996, 2011 Oracle Corporation. All rights reserved.
Enter Enterprise Manager Root (SYSMAN) Password :
OMS Console is unlocked. HTTP ports too can be used to access console.
Agent Upload is unlocked. Unsecure Agents may upload over HTTP.
Restart OMS.


[oracle@hostname:/home/oracle]$ $OMS_HOME/bin/emctl status oms -details
Oracle Enterprise Manager Cloud Control 12c Release 12.1.0.1.0
Copyright (c) 1996, 2011 Oracle Corporation. All rights reserved.
Enter Enterprise Manager Root (SYSMAN) Password :
Console Server Host : hostname.domainname 
HTTP Console Port : 7788
HTTPS Console Port : 7799
HTTP Upload Port : 4889
HTTPS Upload Port : 1159
OMS is not configured with SLB or virtual hostname
Agent Upload is unlocked.
OMS Console is unlocked.

Active CA ID: 1
Console URL: https://hostname.domainname:7799/em
Upload URL: https://hostname.domainname:1159/empbs/upload

WLS Domain Information
Domain Name : GCDomain
Admin Server Host: hostname.domainname

Managed Server Information
Managed Server Instance Name: EMGC_OMS1
Managed Server Instance Host: hostname.domainname

 

Additionally, no other discovered EM 12c Cloud Control agents are able to upload to the OMS, either.

 

Changes

 

Cause

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