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Fixing MID Server Problems

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In this lesson, you will learn:

  • Common MID Server problems
  • Where to look
  • How SNWR fixed snwr-mid-lon-01

🔁 Quick look back: Last time: Fixing Classification Failures. You learned why devices or apps go unclassified, and how to fix it.

1 The Problem: London’s MID Server Is Down

After Windows patching, snwr-mid-lon-01 showed Down. London’s nightly scan didn’t run. The instance only said:

  • Status: Down.
  • Last contact: 8 hours ago.

🎯 The problem: London’s MID Server is down, and the scan didn’t run.

👉 The fix: Check the host, the service and the MID logs, in that order.

Table of MID problems.
Figure 1. Common MID Server problems.

2 Where to look

  1. Is the host running?
  2. Is the MID service running?
  3. Read the MID agent log on the host.
  4. Check the MID record on the instance.

Key term: Agent log

The MID Server’s own log file on the host. It shows connection errors and startup problems.

3 Common fixes

  • Start the service, and set it to start automatically.
  • Fix the proxy or network path.
  • Free disk space.
  • Re-validate after a reinstall.

4 Project Clear View: How We Implemented It

📍 Situation: snwr-mid-lon-01 was Down after patching.

🧭 Decision: Check host, service and log with Oliver.

🛠️ Steps we took:

  1. Oliver confirmed the host was up.
  2. The MID service was stopped: its startup type had changed to manual.
  3. Set it to automatic and started it.
  4. Checked the agent log, then ran a London Quick Discovery.

✅ What we verified:

  • The MID is Up and validated.
  • The alert for Down MID Servers was added (see MID Servers › MID Server Health, Upgrades and Operations).

📁 Evidence: Troubleshooting log entry and a runbook step: check MID services after patching.

5 Quick recap

  • Check host, service, agent log, then the MID record.
  • Down usually means the host or service isn’t running.
  • Reinstalls need re-validation.
  • Check MID Servers after patching.

6 Check yourself

Think of your answer first. Then tap to check.

1 What was wrong with snwr-mid-lon-01? Show answer

The MID service was stopped because its startup type changed to manual.

2 What is the agent log? Show answer

The MID Server’s own log on the host, showing connection and startup errors.

3 What’s the first check for a Down MID Server? Show answer

Is the host running, and is the MID service running?

Nice work! You can bring a MID Server back. 🎉
Next up: Using Workspace Diagnostics

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