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EM 12c, EM 13c : Enterprise Manager Cloud Control Agent Blocked Due to Plugin Mismatch and emoms_pbs.trc reports EXTRA_ON_AGENT (Doc ID 1919203.1)

Last updated on FEBRUARY 28, 2023

Applies to:

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


Enterprise Manager Cloud Control Agent status shows it is blocked:

$<AGENT_INST_HOME>/bin/emctl status agent

Heartbeat Status shows 'Agent is blocked'

Oracle Enterprise Manager Cloud Control 12c Release 2  
Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.
Agent Version     : 12.1.0.x.0
OMS Version       : (unknown)
Protocol Version  :
Agent Home        : <AGENT_BASE_DIR>/agent_inst
Agent Binaries    : <AGENT_BASE_DIR>/core/
Started by user   : oracle
Last Reload       : (none)
Last successful upload                       : (none)
Last attempted upload                        : (none)
Total Megabytes of XML files uploaded so far : 0
Collection Status                            : Collections enabled
Heartbeat Status                             : Agent is blocked
Last attempted heartbeat to OMS              : 2014-10-15 09:59:45
Last successful heartbeat to OMS             : (none)
Next scheduled heartbeat to OMS              : 2014-10-15 10:02:45
Agent is Running and Ready

$<AGENT_INST_HOME>/bin/emctl upload agent

fails with the following message

Oracle Enterprise Manager Cloud Control 12c Release 2
Copyright (c) 1996, 2012 Oracle Corporation. All rights reserved.
EMD upload error:full upload has failed: The agent is blocked by the OMS.
Plugin mismatches between agent and repository. Check plugin:[ The plug-in is oracle.sysman.db (AGENT_BLOCKED)

SQL query output shows 'EXTRA_ON_AGENT'

SQL> select * from MGMT_BLOCKED_AGENTS where  target_guid=(Select target_guid from mgmt_targets where target_name like '%<AGENT HOST NAME>%‘);

Plugin mismatches between agent and repository
Version in pla inventory : null
Version on agent : <version>
Error code : EXTRA_ON_AGENT

 $<EM_INSTANCE_HOME>\em\EMGC_OMS\sysman\emoms_pbs.trc reports the following message:

Error code : EXTRA_ON_AGENT
Error Msg : This plug-in is present in the inventory for the given agent but has not been provided in the input, The plug-in is oracle.sysman.db


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