Implementing server-side tagging in Google Tag Manager (GTM SS) with Snowplow can streamline event tracking, but configuration issues may prevent requests from being claimed by the Snowplow client. This post explores common causes and solutions for the "No Client Claimed the Request" error.

Q: What does "No Client Claimed the Request" mean in GTM SS?

This error occurs when the Snowplow client in GTM SS does not recognize or handle a specific request path. Typically, this happens when the POST request path is misconfigured or does not match the expected path in the Snowplow client.

Q: Why does the Snowplow client not claim the request?

In Snowplow GTM SS, the default POST path for the client is /com.snowplowanalytics.snowplow/tp2. If the request is sent to a different path (e.g., /com.snowplowanalytics.com/tp2), the client will not claim the request. This discrepancy is a common source of the error.

Q: How can I resolve the "No Client Claimed the Request" error?

1. Verify the POST Path: Ensure that the POST request is targeting the correct path:
   

• Correct path: /com.snowplowanalytics.snowplow/tp2
  
• Incorrect path: /com.snowplowanalytics.com/tp2
  
  

2. Update the Client Configuration: If necessary, update the client configuration to accept a custom path:
   
   

{

  "path": "/custom/path/tp2"

}

3. Test with GET Requests: If POST requests are not being claimed, verify that GET requests to /i endpoints work as expected. This helps isolate whether the issue is specific to POST requests.
   
   

Q: Are there other potential issues?

• 404 Errors: If the container is returning 404 errors, confirm that the GTM SS container is correctly deployed and that the expected paths are accessible.
  
• Deployment Issues: Ensure that the GTM SS container is fully deployed and accessible. Misconfigurations during deployment can prevent requests from being claimed.
  
  

Final Thoughts

The "No Client Claimed the Request" error is typically caused by a mismatch in request paths or misconfigured client settings in GTM SS. Verifying paths, updating client configurations, and ensuring correct deployment can resolve these issues effectively. For more troubleshooting guidance, refer to the Snowplow documentation.

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