OEM 13c: Agent is out-of-sync with repository. This most likely means that the agent was reinstalled or recovered

 On a Friday morning shift, during my monitoring routine I found the EM agent was out of sync in my tableau server.

A quick surf on the internet landed me on couple of Oracle's MOS documents and I was able to solve the issue. Below are the step by step process to fix the issue.

1. Try to upload the agent if in case it was recently recovered or reinstalled. If upload's successfully, then the issue is resolved else continue the remaining steps

2. Log in to the OEM console and select the Agents

3. Once you pulled the agents, select the 'Agent Unreachable' option

4. Now select the host against the blocked agent

5. From the LOV, choose the resynchronization option and continue the process

6. Once the sync is done, check the agent status

7. Now try to upload the agent. That's all and the issue is fixed.

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