EM 12c: Target Displays Agent Unreachable Status in Enterprise Manager 12c Cloud Control although it is Running
(Doc ID 2349158.1)
Last updated on AUGUST 19, 2022
Applies to:
Enterprise Manager Base Platform - Version 12.1.0.2.0 and laterEnterprise Manager for Oracle Database - Version 12.1.0.2.0 and later
Information in this document applies to any platform.
Symptoms
Enterprise Manager (EM) 12.1.0.2 Cloud Control
This can be applicable to all target types (ASM/db/wls e.t.c)
An ASM target shows in Agent Unreachable status in EM 12.1.0.2 Cloud Control, although it is running and should show a status of Up (green arrow):
Current status of the EM 12c Agent is "Agent is Not Running":
/u01/app/oracle/product/agent/core/12.1.0.2.0/bin/emctl status agent
Oracle Enterprise Manager Cloud Control 12c Release 2
Copyright (c) 1996, 2012 Oracle Corporation. All rights reserved.
---------------------------------------------------------------
Status agent Failure:unable to connect to http server at https://hostname.com:3872/emd/lifecycle/main/. [peer not authenticated]
Agent is Not Running
EM 12c.1.0.2 Agent start responds with "port conflict on port(3872)":
/u01/app/oracle/product/agent/core/12.1.0.2.0/bin/emctl start agent
Oracle Enterprise Manager Cloud Control 12c Release 2
Copyright (c) 1996, 2012 Oracle Corporation. All rights reserved.
Starting agent ........ failed.
HTTP Listener failed at Startup
Possible port conflict on port(3872): Retrying the operation...
Failed to start the agent after 1 attempts. Please check that the port(3872) is available.
Consult emctl.log and emagent.nohup in: /u01/app/oracle/product/agent/agent_inst/sysman/log
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Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |