Release Notes for Zabbix 4.0.15rc2

Zabbix Team is pleased to announce the availability of Zabbix 4.0.15rc2.

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 4.0.15rc2. 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

Moved LLD rules from parent templates to linked templates for Module HOST-RESOURCES-MIB SNMPv2, Module Interfaces Windows SNMPv2, Net Arista SNMPv2, OS Windows SNMPv2 Templates
ZBX-16871 Fixed not setting the default values of multiselects on initial load Frontend
ZBX-16776 Reworked custom item select to multiselect Frontend
ZBXNEXT-5532 Disabled guest user by default Installation
ZBXNEXT-4825 Implemented in Monitoring -> Problems the button "Export to CSV" to export all pages Frontend

Bug Fixes

ZBX-16955 Fixed performance of history syncers and timer processes by not locking each other when suppressing events Server
ZBX-16842 Added range validation and optional conversion to is_double() Agent Proxy Server
ZBX-16790 Fixed log rotation on Windows Agent
ZBX-16865 Fixed dynamic graphs not updating when changing host in combo box Frontend
ZBX-9146 Fixed json null value being treated as empty string for LLD filters Server
ZBX-16828 Fixed array_db validation when validated value is not an array Frontend
ZBX-11659 Made user profile icon visible for guest user Frontend
ZBX-16849 Moved INTERFACE_TYPE_PRIORITY definition to misc.c Server
ZBX-16844 Fixed the process of saving the scroll position on the Latest data page in Internet Explorer Frontend
ZBX-16343 Fixed LLD not to create items on wrong host if there are failed transactions Server
ZBX-16730 Fixed disappearance of successful modification message while saving the Dashboards Frontend
ZBX-16679 Fixed username and password fields resetting and saving for item, item prototype and LLD rule on type change API
ZBX-16785 Improved performance of timer process when reading from "problem_tag" table Server
ZBX-16696 Fixed multiselect suggest box clipping when overflowing not allowed in parent containers Frontend
ZBX-16809 Fixed undefined offset error in action operation condition form Frontend
ZBX-16595 Optimized active logs checks monitoring when buffer flushing fails Agent
ZBX-16682 Fixed wrong element label update in map constructor Frontend
ZBX-16815 Fixed widget form positioning when changing widget type from Graph to any other type Frontend
ZBX-16706 Fixed unneeded padding for dashboard URL widget Frontend
ZBX-16784 Fixed Oracle performance by using "between" operator in SQL queries Frontend
ZBX-16579 Fixed long text wrapping in the latest data history Frontend
ZBX-16767 Fixed possible null pointer arithmetic; thanks to Mikhail Grigorev for the patch Agent Proxy Server
ZBX-16500 Fixed SLA calculation when requested time window starts during the service time; fixed downtime time calculation API
ZBX-16805 Fixed when the HttpTest API selects too many entries from the httpstep table when editing a specific Web scenario API
ZBX-10618 Fixed disappearing dependent trigger cells and rows in overview Frontend
ZBX-16596 Added handling of BOM to detect encoding for vfs.file.contents, vfs.file.regex and vfs.file.regmatch Agent
ZBX-16771 Fixed wrong Tab number being remembered when several browser tabs are in use Frontend
ZBX-16548 Fixed sort order in plain text screen Frontend

Installation and Upgrade Notes


See Zabbix指导手册。 for full details.


See 升级指南 for upgrade options and instructions. For version specific upgrade notes, see Upgrade notes for 4.0.15.

Commercial support

Zabbix Company provides a full range of Professional Services. We also provide trouble-free 升级服务 for easy migration from earlier versions of Zabbix. Please 联系我们 for pricing and more details.


Zabbix 4.0 Manual