How to Find the ActiveGate for an HTTP Monitor Execution

HannahM · ‎01 Feb 2024

Summary

When you’re troubleshooting intermittent HTTP Monitor failures in Dynatrace, it’s often necessary to determine which Synthetic ActiveGate executed a specific monitor run—especially when using Private Synthetic Locations with multiple ActiveGates.

This guide explains how to quickly find the exact ActiveGate involved in an HTTP Monitor execution and what to do if the information isn’t immediately visible.

Summary
Problem
Private Location Resolution
(Latest Dynatrace) How to find the ActiveGate used for an HTTP Monitor execution
(Classic) How to find the ActiveGate used for an HTTP Monitor execution
Cluster and Public Locations Resolution
What's Next
Related reading

Problem

In Dynatrace, HTTP Monitor execution details show the synthetic location and engineId where the run occurred. How can this information be used to determine which specific ActiveGate executed the test?

Knowing this is essential when diagnosing:

Intermittent failures
Host‑specific issues
Configuration differences
Network or certificate problems
Proxy‑related behavior

Private Location Resolution

(Latest Dynatrace) How to find the ActiveGate used for an HTTP Monitor execution

Open a Notebook in Dynatrace.
Add a DQL section.

Paste in the following query:

fetch dt.synthetic.events
|filter event.type == "http_monitor_execution"
|fields timestamp, dt.synthetic.monitor.id, monitor.name, dt.entity.synthetic_location, location.name, event.id, result.engine.id, numberToHexString(toLong(result.engine.id))
|lookup [ fetch dt.entity.synthetic_location ],
    sourceField: dt.entity.synthetic_location,
    lookupField: id,
    fields: { location.name = entity.name }
| fieldsRename hex = `numberToHexString(toLong(result.engine.id))`

You can refine the filter to search for specific executions or monitors. For example, you could search for only the monitor with id HTTP_CHECK-472DC1A4B78A1758 by adding to the filter.
```
|filter event.type == "http_monitor_execution"  and dt.synthetic.monitor.id=="HTTP_CHECK-472DC1A4B78A1758"
```
Run the query
The hex column contains the ActiveGate ID in hexadecimal format.

Copy this hex value and use it to search on the Deployment status > ActiveGates page to find the exact ActiveGate that ran the HTTP Monitor execution.

(Classic) How to find the ActiveGate used for an HTTP Monitor execution

Navigate to the HTTP Monitor in Dynatrace.
Select Analyze execution details.
Choose the execution you want to investigate.
If multiple locations appear, ensure you select the correct one
Inside the execution details, note the engineId value.
- Dynatrace displays this value in decimal format.
- However, the ActiveGates page uses hexadecimal (hex).
Convert the decimal engineId to hex using:
1. Your calculator
2. Any online decimal‑to‑hex converter
  
  Example:
  Decimal: 1532483830
  Hex: 5B57D8F6
Go to Deployment Status > ActiveGates.
Filter by ID.
Enter the ID in hex format, prefixed with 0x:
```
0x5B57D8F6
```
You should now see the exact Synthetic ActiveGate that executed the monitor.

Cluster and Public Locations Resolution

Identifying the execution ActiveGate is not available through the UI.
Please open a chat and provide:

A link to the execution
A short description of the issue

Support will help identify which ActiveGate processed the execution.

What's Next

If you weren't able to find the ActiveGate that ran the execution using the steps above, open a chat and a link to the execution you are interested.

How can I find which ActiveGate my HTTP Monitor execution ran on?