Release Notes for Zabbix 4.0.23rc1

Zabbix Team is pleased to announce the availability of Zabbix 4.0.23rc1.

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 4.0.23rc1. 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-6004 Added host info to vmware event message log
ZBXNEXT-5903 Added vmware datacenters discovery

Bug Fixes

ZBX-8081 Fixed 'cmdline' parameter truncation on Solaris 11.3 and later
ZBX-18014 Fixed memory leak when action message does not have to be sent
ZBX-15117 Fixed graph configuration with large amount of items
ZBX-18069 Fixed server exit when trying to execute IPMI script without IPMI pollers
ZBX-17960 Fixed undefined index in trends API
ZBX-17682 Fixed button disable state in template item list and discovery list
ZBX-17820 Fixed classic graph widget default header
ZBX-17924 Fixed php errors in "System information" window for MySQL
ZBX-17917 Changed vm.memory.size keys on Solaris to get memory usage statistics from kstat
ZBX-18029 Fixed cpu counter wraparound handling on Solaris
ZBX-17624 Fixed misleading error message in case of not available datastorage for and vmware.hv.datastore.write metrics
ZBX-17860 Fixed host prototype import
ZBX-17922 Removed mtime check when matching files on disk with the cached list, this should reduce chances of log files being scanned again after system time changes

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 4.0.23.

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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