Home > Enterprise Manager, Grid Control, Oracle > Oracle Grid Control: Agent Collection State Disabled by Upload Manager / How to resync/unblock a Grid Control Agent

Oracle Grid Control: Agent Collection State Disabled by Upload Manager / How to resync/unblock a Grid Control Agent

Problem description:

Grid Control lists targets for a server as DOWN and agent has an UNKNOWN state. If you are checking the status on the agent, you will see that your agent is running, but has a Collection Status of “Disabled by Upload Manager”:

oracle@racdb01 /u01/app/agent/agent11g/bin # ./emctl status agent
Oracle Enterprise Manager 11g Release 1 Grid Control 11.1.0.1.0
Copyright (c) 1996, 2010 Oracle Corporation.  All rights reserved.
---------------------------------------------------------------
Agent Version     : 11.1.0.1.0
OMS Version       : 11.1.0.1.0
Protocol Version  : 11.1.0.0.0
Agent Home        : /u01/app/agent/agent11g
Agent binaries    : /u01/app/agent/agent11g
Agent Process ID  : 17105112
Parent Process ID : 8192042
Agent URL         : https://racdb01:3872/emd/main/
Repository URL    : https://gridc01.initso.at:4901/em/upload
Started at        : 2011-07-05 10:12:11
Started by user   : oracle
Last Reload       : 2011-07-05 10:12:11
Last successful upload                       : (none)
Last attempted upload                        : (none)
Total Megabytes of XML files uploaded so far :     0.00
Number of XML files pending upload           :      337
Size of XML files pending upload(MB)         :    50.24
Available disk space on upload filesystem    :    24.84%
Collection Status                            : Disabled by Upload Manager
Last attempted heartbeat to OMS              : 2011-07-05 10:17:07
Last successful heartbeat to OMS             : unknown
---------------------------------------------------------------
Agent is Running and Ready
oracle@racdb01 /u01/app/agent/agent11g/bin #

 
Cause:

On the Management Agents page (accessible via Setup -> Agents Subtab) agents will be marked as blocked:

 

If you display the details of the agent, Grid Control will present you the message “The Oracle Management Server(OMS) has blocked this agent because it has either been reinstalled or restored from a filesystem backup. Please click on the Agent Resynchronization button to resync the agent.”:

 


 
Problem resolution:

Click on “Agent Resynchronization” in order to resync the agent and reestablish a normal agent status (leave “Unblock agent” checked):

 

Grid Control will start to resync the agent configuration immediately:

 

Upon end of the resync process you will be redirected to the agents detail page:

 

“emctl status agent” will now point out that the agent is again able to communicate with the Oracle Management Server and upload collected data:

oracle@racdb01 /u01/app/agent/agent11g/bin # ./emctl status agent
Oracle Enterprise Manager 11g Release 1 Grid Control 11.1.0.1.0
Copyright (c) 1996, 2010 Oracle Corporation.  All rights reserved.
---------------------------------------------------------------
Agent Version     : 11.1.0.1.0
OMS Version       : 11.1.0.1.0
Protocol Version  : 11.1.0.0.0
Agent Home        : /u01/app/agent/agent11g
Agent binaries    : /u01/app/agent/agent11g
Agent Process ID  : 17105112
Parent Process ID : 8192042
Agent URL         : https://racdb01:3872/emd/main/
Repository URL    : https://gridc01.initso.at:4901/em/upload
Started at        : 2011-07-05 10:12:11
Started by user   : oracle
Last Reload       : 2011-07-05 10:28:35
Last successful upload                       : 2011-07-05 10:29:27
Total Megabytes of XML files uploaded so far :     2.89
Number of XML files pending upload           :        0
Size of XML files pending upload(MB)         :     0.00
Available disk space on upload filesystem    :    25.00%
Last successful heartbeat to OMS             : 2011-07-05 10:28:42
---------------------------------------------------------------
Agent is Running and Ready
oracle@racdb01 /u01/app/agent/agent11g/bin #

 
After processing by the Oracle Management Server, the status information will also update in the graphical interface:

 

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