Release Notes for Zabbix 5.2.7rc1

Zabbix Team is pleased to announce the availability of Zabbix 5.2.7rc1.

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 5.2.7rc1. 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-6517 Added {#VM.FOLDER} macro with chain of vm parent folders to the vmware vm discovery
ZBXNEXT-6662 Increased field size to 2000 characters in web scenario variables and web scenario step variables and post fields
ZBXNEXT-4910 Added severity in problem real-time export protocol
ZBXNEXT-6589 Added Job discovery, backup process items in Database discovery, macros, and value map
ZBXNEXT-6497 Added read/write locking to value cache
ZBXNEXT-6504 Added Templates "TiDB by HTTP", "TiDB TiKV by HTTP" and "TiDB PD by HTTP"
ZBXNEXT-6508 Added template for APC UPS Symmetra RX
ZBXNEXT-6571 Added templates for APC UPSs Galaxy 3500, Smart-UPS, Smart-UPS SRT, Symmetra RM

Bug Fixes

ZBX-19424 Fixed trigger handling failing if host name looks like a number
ZBX-19139 Fixed memory errors in cmdline parsing on freebsd
ZBX-18891 Fixed "Cancel" button disappearing on last setup step
ZBX-19358 Fixed memory leak in case of duplicate vmware hv uuid
ZBX-19114 Fixed slow detection of vmware hv multipath values for medium and huge vc instances
ZBX-19248 Fixed retrieving of all data from separate database tables inside of API methods when empty value for filter is passed
ZBX-19320 Fixed SAML advanced configuration ignores "baseurl" option; added custom option "use_proxy_headers"
ZBX-19300 Updated jquery version
ZBX-19340 Optimized history cache to reduce storage of metadata-only records
ZBX-18524 Improved preprocessing diagnostic information to include oldest values in queue and totals to include done, queued, processing and pending
ZBX-19291 Fixed memory error when linking host prototypes
ZBX-19359 Fixed error in logsource function due to empty source
ZBX-19313 Improved performance by removing redundant lastclock update in configuration cache
ZBX-19208 Fixed imprecise ns on windows
ZBX-19065 Fixed Zabbix agent 2 logging if the file is moved or removed
ZBX-19334 Removed redundant ListenIP parameter in server's configuration file
ZBX-19307 Improved performance of history syncers by reducing time spent in locks when syncing history and receiving new history from proxy
ZBX-19038 Fixed lld manager not to process lld rules on same host in parallel to avoid duplicated item keys being discovered; fixed crash when duplicated item key on same host exists
ZBX-19324 Fixed possible deadlocks between configuration and history syncers on proxy
ZBX-19209 Fixed panic in proc plugin for Zabbix agent 2
ZBX-19241 Stopped proxy from overwriting local lastlogsize and mtime
ZBX-19321 Fixed missing event tags in case of multiple problems
ZBX-19063 Fixed logging for unsupported windows service command in Zabbix agent 2
ZBX-19099 Fixed Zabbix agent 2 windows services plugin second parameter
ZBX-18883 Fixed logrt[] monitoring with copytruncate rotation
ZBX-19274 Fixed semaphore not being cleaned up on Solaris when terminating Zabbix sender
ZBX-19233 Fixed potential loss of original error when reading vmware events
ZBX-18701 Fixed syntax mistakes in Template DB MySQL, renamed LLD rule to Database discovery
ZBX-19159 Added postponing of recovery operation when problem operation still executes, fixed memory leak while saving tags returned by webhook
ZBX-19102 Fixed conversion of EVENT.NAME to EVENT.RECOVERY.NAME in recovery opmessage
ZBX-19253 Removed ICMP checks, moved items to another application, changed update interval, added "Discard with heartbeat" preprocessing in APC UPS templates
ZBX-19088 Fixed overload memory with unused vmware events
ZBX-18673 Fixed JS in Slack media and updated documentation
ZBX-18372 Fixed additional word before parameters in fatal error message text
ZBX-19210 Fixed css file versioning for custom themes
ZBX-18912 Fixed escalation message is using template message instead of custom message in actions
ZBX-18667 Fixed code spelling in templates
ZBX-17454 Changed the unit of data item "" in PostgreSQL template
ZBX-19195 Fixed endless loop in graph widget processing if widget size is too small
ZBX-18809 Changed formula for latency in Elasticsearch template

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 5.2.7.

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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