Release Notes for Zabbix 5.2.1rc1

Zabbix Team is pleased to announce the availability of Zabbix 5.2.1rc1.

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 5.2.1rc1. 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-6236 Added template "Apache Kafka by JMX"
ZBXNEXT-6247 Improved LLD rule processing after reconnecting to proxy
ZBXNEXT-6201 Added "Template DB Apache Cassandra by JMX"

Bug Fixes

ZBX-18591 Fixed active Zabbix Agent v2 5.0 doesn't work with Server v5.2.0
ZBX-18185 Fixed compilation error on Solaris 10
ZBX-18538 Fixed API role.update rules validation
ZBX-18317 Fixed fatal error when updating only discovered triggers and their properties
ZBX-18163 Fixed being able to delete interfaces on discovered hosts
ZBX-18505 Fixed build failing to compile for Zabbix agent 2 on ARM/v7 and ARM/v6
ZBX-18380 Changed trigger of the net.if.speed item in the Windows network module template
ZBX-18494 Removed recovery mode NONE in trigger "Operating system description has changed"
ZBX-18546 Fixed "Something impossible" bug in server and proxy when diaginfo is requested
ZBX-18058 Updated the list of item keys and their descriptions
ZBX-18531 Fixed template "Ceph by Zabbix Agent2" pool discovery
ZBX-18476 Changed Fan, Temperature, Voltage LLD rules in Template Net Arista
ZBX-16155 Fixed "Template Net TP-LINK" readme

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 5.2.1.

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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