[ZBX-25980] HTTP agent Item test fails with "Cannot read the response, check connection with the Zabbix server" Created: 2025 Feb 03  Updated: 2025 Feb 06  Resolved: 2025 Feb 06

Status: Closed
Project: ZABBIX BUGS AND ISSUES
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Incident report Priority: Trivial
Reporter: Robbe Devos Assignee: Zabbix Development Team
Resolution: Duplicate Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Duplicate
duplicates ZBX-25796 Confusing error message on item test ... READY TO DEVELOP

 Description   

Steps to reproduce:

  1. Create a Template
  2. Create HTTP agent item to request data from an API
  3. Press the "TEST" button in the item creation menu
  4. Choose the option proxy and choose a proxy 
  5. Press TEST

Result:
80% of the time the test fails with the following error:

 

Cannot read the response, check connection with the Zabbix server "{ZBXSERVER}".

 

Expected:
Return the data from the HTTP URL

Extra info:
**

  • Connection to the HTTP URL from the proxy is allowed by the firewall
  • All necessary ports from the proxy to the server are active

This issue is only occurring while preforming an item test, when checking the data from latest data on a host where the template with the HTTP agent item is activated, everything working as expect.

 Comments   
Comment by Alexander Vladishev [ 2025 Feb 05 ]

Please specify the version of Zabbix you are using. Do all components (zabbix_server, zabbix_proxy, frontend) have the same version?
You mentioned that the item receives a value from the API. Is this the Zabbix API?

Comment by Robbe Devos [ 2025 Feb 05 ]

Our Zabbix version is 7.0.8. All components have the same version.

We just upgrade to version 7.0.9 and the issue still persist.

Not the Zabbix API but some external tool, but it doesn't matter what HTTP endpoint you send a request to. 

The same issue occurs when sending request to www.google.com

Comment by Alexander Vladishev [ 2025 Feb 05 ]

This error occurs when the frontend does not receive a response from the Zabbix server.

Increase the debug level for the "trapper" process using a runtime command and check the server log file for any errors.

zabbix_server -R log_level_increase=trapper
Comment by Robbe Devos [ 2025 Feb 06 ]

I increased the log level on the server.

There are no errors found after executing the test.

Comment by Alexander Vladishev [ 2025 Feb 06 ]

What value do you have set for the "Item test" parameter on the Administration → General → Timeouts page?

Try increasing it if it is too low.

Comment by Alexander Vladishev [ 2025 Feb 06 ]

It looks like your issue is a duplicate of ZBX-25796.

Comment by Robbe Devos [ 2025 Feb 06 ]

The timeout solved the issue!

Thanks for the help, this issue can be closed

Generated at Tue Apr 01 08:20:13 EEST 2025 using Jira 9.12.4#9120004-sha1:625303b708afdb767e17cb2838290c41888e9ff0.