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EM 13c: How to Avoid False Agent Unreachable Alerts Followed by Clear Alerts Despite Agents are UP and Running (Doc ID 2634649.1)

Last updated on MARCH 05, 2023

Applies to:

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


In some of the environments, due to intermittent network latency between the OMS and agents, EM generates agent unreachable alerts.

Example alert as follows:

Host=<host name>
Target type=Agent
Target name=<AgentName>
Message=Agent is unable to communicate with the OMS. (REASON = Agent is Unreachable (REASON : Agent to OMS Communication is broken. failed to read status code in ping HTTP response)

$<AGENT_INST>/sysman/log/emagent.nohup reports following errors in some of these cases.

oracle.sysman.emSDK.agent.fetchlet.exception.FetchletException: Error: Timed out waiting 120 seconds executing command on target.

$<AGENT_INST>/sysman/log/gcagent.log reports following errors:

2020-01-09 09:36:13,195 [580:CDEB16E1] WARN - Ping communication error
o.s.emSDK.agent.comm.exception.CommIOException [failed to read status code in ping HTTP response] [Read timed out]



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