Release Notes for Zabbix 4.2.5

Zabbix Team is pleased to announce the availability of Zabbix 4.2.5.

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 4.2.5. 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-4502 Added support of full JsonPath functionality Proxy Server
Blocked zero item history/trends period being overridden by global configuration Frontend Proxy Server

Bug Fixes

ZBX-16308 Fixed proxy-server configuration synchronization when using dependent items Proxy Server
ZBX-16365 Fixed "Something impossible has just happened." error in case item type is set to log type but log is not monitored Proxy
ZBX-16344 Fixed possibility to add graph widget overrides Frontend
ZBX-16388 Fixed LLD to update preprocessing step number in case it is incorrectly generated Server
ZBX-15954 Fixed functional macros resolving in maps Frontend
ZBX-16337 Fixed debug log message for suppressed escalations; thanks to Kotaro Miyashita for the patch Server
ZBX-16287 Fixed compiler warnings in host.c; thanks to Glebs Ivanovskis for the patch Proxy Server
ZBX-16103 Reduced PCRE recursion limit Agent Proxy Server
ZBX-16289 Fixed async dashboard widget update Frontend
ZBX-13266 Improved performance of the SQL queries with lot of IDs in the condition API
ZBX-16277 Fixed compilation Zabbix agent for Windows with options available for Windows Vista and newer Installation
ZBX-16239 Fixed compilation warining related to prototypes of module API functions Agent Proxy Server
ZBX-16207 Fixed compilation warining related to possible use of uninitialised variable; thanks to Glebs Ivanovskis for the patch Proxy Server
ZBX-16256 Eliminated possible infinite fetch loop with OracleDB Proxy Server
ZBX-15343 Fixed JS memory leak in hintboxes in graph widget Frontend
ZBX-16329 Fixed duplicate value checking in trigger action conditions Frontend
ZBX-15562 Reworked history.get API method; fixed output as well as other known issues in history API API
ZBX-15976 Fixed groups filter being reset after check now request in items Frontend
ZBX-16135 Fixed error messages in XML export files Frontend
ZBX-16213 Fixed PostgreSQL bad performance on history tables API
ZBX-16176 Preserve trailing spaces in history values Frontend
ZBX-16169 Improved performance of map navigation tree widget Frontend
ZBX-16288 Fixed when unknown resource logged in audit log when working with dashboards Frontend
ZBX-16134 Fixed duplicate triggers can be created using API and XML import API
ZBX-15969 Fixed displaying of very small values that are more than 2 decimal points in latest data Frontend
ZBX-16280 Fixed when Plain Text Widgets do not display as HTML when option is selected Frontend
ZBX-16012 Fixed confusing error message "Cannot read JSON." in HTTP agent item API Frontend
ZBX-16263 Fixed preprocessing step history is not reset when "on fail" "set value" action triggers Proxy Server
ZBX-16270 Fixed memory leak in IPC service when queueing multiple messages to client Proxy Server
ZBX-15962 Added mounted filesystems to vfs.fs.discovery of windows agent Agent
ZBX-16204 Fixed undefined offset in CControllerWidgetProblemHostsView Frontend
ZBX-16153 Fixed 500 Internal Server Error when trying to preview pie/exploded graph without items Frontend
ZBX-16315 Fixed Zabbix server not to cause foreign key constraint failure on Zabbix proxy when changing and sending configuration at the same time Server
ZBX-9867 Improved Zabbix daemon termination by not using signal unsafe functions in signal handler; improved Zabbix server and Zabbix proxy process termination by stopping data collection and waiting for history syncers to finish Agent Proxy Server

Installation and Upgrade Notes


See Zabbixマニュアル for full details.


See Upgrade procedure for upgrade options and instructions. For version specific upgrade notes, see Upgrade notes for 4.2.5.

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 営業への問い合わせ for pricing and more details.


Zabbix 4.2 Manual