Release Notes for Zabbix 4.0.13

Zabbix Team is pleased to announce the availability of Zabbix 4.0.13.

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 4.0.13. Download it from here.

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-1287 Added support for English performance counters on Windows Agent
ZBX-3783 Added strict validation of input parameters in valuemap.get() method API
ZBXNEXT-4920 Increased received packet size to 1GB Proxy Server

Bug Fixes

ZBX-13266 Fixed performance of sql query with lots of items Proxy Server
ZBX-16089 Fixed Windows socket initialization in Windows sender sample application
ZBX-16228 Increased max length to 2000 characters for values of the headers of the http agents Frontend
ZBX-16480 Fixed error in graphs after page refresh if period was set to future Frontend
ZBX-16452 Fixed inconsistency in show legend, working time and triggers for graphs in screens and dashboard Frontend
ZBX-16565 Fixed incorrect sorting of triggers in "Trigger overview" widget Frontend
ZBX-7798 Improved performance of icmpping* for fping v4.0 and more Server
ZBX-16522 Fixed undefined index "type" in pie and exploded graph creation API
ZBX-16545 Fixed shell script execution timeout log message Agent Proxy Server
ZBX-16467 Removed tables without auto-increment from DBget_maxid_num function Proxy Server
ZBX-16538 Fixed color for the multiselect selected items Frontend
ZBX-16445 Fixed possible duplicate key insertion during LLD Server
ZBX-16539 Fixed "Template Net Juniper SNMPv2" Templates
ZBX-16349 Fixed "Delete missing" checkbox does not work when importing template without checking "Update existing" API
ZBX-16279 Fixed trailing spaces handling in value mapping when using MySQL Server
ZBX-16460 Fixed Zabbix daemon termination on FreeBSD Agent Proxy Server
ZBX-16230 Fixed unreachable host next check calculation uses both unreachable settings and flexible item interval Proxy Server
ZBX-16449 Fixed wrong order of the displayed latest values in problems Frontend
ZBX-16435 Fixed Zabbix graph spinning in preview tab in IE11 Frontend
ZBX-15766 Fixed the ability to add an unlimited number of widgets in the Dashboard Frontend
ZBX-16398 Fixed selection of discovered services by dservice.get "dcheckids" property API
ZBX-16370 Fixed link indicator coloring in network maps 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 4.0.13.

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