Release Notes for Zabbix 4.0.16rc1

Zabbix Team is pleased to announce the availability of Zabbix 4.0.16rc1.

Zabbix is an enterprise-class open source distributed monitoring solution. Zabbix is released under the GPL, thus it is free of charge for both commercial and non-commercial use. A complete text of the license is available at

This document contains the release notes for Zabbix 4.0.16rc1. Download it from download.

The following sections describe the release in details and provide late-breaking or other information that supplements its main documentation.

New Features and Improvements

ZBXNEXT-5271 Implemented 'delete missing' option for imported template linkages

Bug Fixes

ZBX-17101 Fixed url validation before output
ZBX-16929 Fixed history data processing responding with "success", when received only invalid data from proxy/agent/sender
ZBX-16804 Added missing get parameters in availability report
ZBX-16286 Fixed graph widget dimensions errors on high DPI screens
ZBX-16848 Fixed fatal error occurring in user profile and user edit forms when PHP FileInfo extension does not exist
ZBX-16684 Fixed incorrect double quotes in history plain text view
ZBX-16903 Fixed validation of "interfaceid" field for HTTP agent items with large IDs
ZBX-16751 Fixed support for php 7.4
ZBX-16879 Changed condition description message for tag value in actions and event correlations
ZBX-9084 Fixed high memory usage during startup
ZBX-16932 Fixed build fail on netBSD
ZBX-16111 Removed templateid from screen API output
ZBX-16919 Fixed server check warning width in chrome
ZBX-16944 Fixed "Type of information" field in item form being marked as required when it is read-only
ZBX-16912 Fixed image map elements having a hand cursor when there is no context menu available
ZBX-15041 Fixed request not being cancelled along with popup window in widgets
ZBX-1977 Fixed axis labels calculation
ZBX-17034 Updated Zabbix website links
ZBX-16874 Fixed map-type widget clipping in Internet Explorer
ZBX-16915 Fixed memory leak
ZBX-17008 Improved Zabbix server performance when using maintenance
ZBX-16779 Fixed infinite loop when writing export to file fails
ZBX-16540 Splitted host_resources templates into 3 subtemplates: for CPU, memory and storage

Installation and Upgrade Notes


See Zabbix documentation for full details.


See Upgrade procedure for upgrade options and instructions. For version specific upgrade notes, see Upgrade notes for 4.0.16.

Commercial support

Zabbix Company provides a full range of Professional Services. We also provide trouble-free Upgrade Service for easy migration from earlier versions of Zabbix. Please Contact sales for pricing and more details.


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