Release Notes for Zabbix 4.0.5rc1

Zabbix Team is pleased to announce the availability of Zabbix 4.0.5rc1.

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 4.0.5rc1. 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-5046 Added non-destructive resizing and reordering of dashboard widgets
Added monitoring of internal metrics from an external Zabbix instance

Bug Fixes

ZBXNEXT-4941 Changed overflow statements to execute one by one for Oracle for better performance
ZBX-15664 Fixed "Undefined index" errors on maps with enabled automatic icon mapping
ZBX-15667 Fixed wrong default Zabbix server status for new installation
ZBX-15512 Fixed performance issues and significant memory consumption on several pages which contains host popup menus
ZBX-15512 Fixed performance issues in "Problems by severity" widget
ZBX-15593 Fixed database upgrade patch to stop upgrade on commit failure
ZBX-15611 Fixed crash in configuration syncer when there are groups with same name and when removing preprocessing steps from item
ZBX-15242 Fixed value trimming and duplicate catching in SVG graph pattern fields
ZBX-15250 Fixed selection box height calculation in classic graph
ZBX-15316 Fixed problem with socket inheritance preventing Windows agent from restarting under certain circumstances
ZBX-15379 Fixed -Wimplicit-fallthrough warnings when compiling with GCC 7 and -Wextra
ZBX-15179 Fixed when message about blocking user login is displayed only on next login attempt
ZBX-15494 Fixed handling numbers that written in scientific notation
ZBX-15533 Fixed cutting and trimming event tags and values
ZBX-15442 Fixed reporting idle time in datasender's process state information
ZBX-15424 Fixed when multiselect doesn't trim values and recognizes untrimmed values as new ones
ZBX-14644 Fixed maintenance time periods "start_date" field being reset to "1920" instead of DB default value when updating via edit form
ZBX-15271 Added link to documentation in all man pages
ZBX-15422 Fixed SQL errors when linked template have item prototype with equal key as host item
ZBX-15456 Fixed incorrect style property in Monitoring->Problems; removed unused id from filter form

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 4.0.5.

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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