Release Notes for Zabbix 4.0.0

Zabbix Team is pleased to announce the availability of Zabbix 4.0.0.

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 http://www.gnu.org/copyleft/gpl.txt.

This document contains the release notes for Zabbix 4.0.0. Download it from downloads.

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-4757
 added new dashboard to "Zabbix server health" 
ZBXNEXT-4757
 renamed default dashboard to "Global view" and improved widget layout 
ZBXNEXT-4757
 added support of "pused" mode for cache-related internal items 
ZBXNEXT-4757
 added new and renamed existing items in "Template App Zabbix Server" and "Template App Zabbix Proxy" templates 
ZBXNEXT-4721
 removed footer from dashboard widgets 
ZBXNEXT-4588
 improved performance of problems selection in graph widget; renamed 'Classic graph' to 'Graph (classic)'; fixed several bugs in graph widget 
ZBXNEXT-4722
 made operator names consistent in all interface 
ZBXNEXT-4739
 removed deprecated macros $1-$9 from item names in templates 
ZBXNEXT-4736
 added index by nextcheck to escalations table 
ZBXNEXT-4672
 added option to show suppressed problems for data overview page and widget 
ZBXNEXT-3860
 added ability to filter triggers by tags 
ZBXNEXT-4606
 implemented kiosk mode for all pages 
ZBXNEXT-4696
 improved history syncer performance by moving trigger locking outside history cache lock 
ZBXNEXT-3848
 added validation of update interval, custom interval, history storage period and trend storage period in low-level discovery 
ZBXNEXT-4224
 implemented templates for server hardware: IBM,HP,Dell,Supermicro 
ZBXNEXT-4588
 Implemented SVG graph generation 
ZBXNEXT-4588
 Implemented SVG graph widget with multiple new widget fields; Renamed existing graph widget to 'Classic graph'; Implemented vertical accordion; Added new UI controls for range control and overrides selection 
ZBXNEXT-4588
 Added option to store long widget field strings as array of short strings; Created class to resize the height of textarea field automatically 
ZBXNEXT-4588
 Improved API validation; Extended time units functionality to allow negative values 
ZBXNEXT-4573
 added support of HTTP authentication as optional authentication mechanism 
ZBXNEXT-413
 added maintenance tag filters to support suppression of individual problems based on their tags 
ZBXNEXT-4609
 added options Tag display priority and Tag display names in Problems 
ZBXNEXT-4656
 added strict validation of hostprototype.create() and hostprototype.update() methods; added audit logging for these methods 
ZBXNEXT-4455
 added screen reader to the dashboard and widgets 
ZBXNEXT-4627,ZBXNEXT-4656
 added support of macro functions to LLD macros 
ZBXNEXT-4049
 added option to hide timeline in Problems widget 
ZBXNEXT-4611
 changed default method for http agent items from "post" to "get" 
ZBXNEXT-4587
 added new column 'Value' and filter in Triggers list 
ZBXNEXT-4626
 improved widget configuration constructor to create custom view for each widget 
ZBXNEXT-4597
 implemented single textbox date fields in maintenances, services, top 100 triggers and availability reports pages 
ZBXNEXT-4558
 added support for monitoring the string values of custom JMX MBeans 
ZBX-14586
 added more informative error message for InstanceNotFoundException error 
ZBXNEXT-4454
 added screen reader attributes for common elements 
ZBXNEXT-4200
 added ability to create LLD item prototype of type "dependent" with a master item not only item prototype 
ZBXNEXT-1701
 added support of regular expressions and global regular expressions to "logsource()" trigger function 
ZBXNEXT-4586
 added support of macros {ITEM.VALUE} and {ITEM.LASTVALUE} to trigger URL 
ZBXNEXT-4049
 added checkbox to hide timeline when problems sort by time 
ZBX-1357
 added and enabled Norwegian translation to be displayed by default 
ZBXNEXT-4367
 added screen reader features for multiselect 
ZBXNEXT-4530
 implemented changeable session cookie name 
ZBXNEXT-4446
 added ability to change severity of previously generated problems 
ZBXNEXT-4044
 changed default values of 'Display OK triggers for' and 'On status change triggers blink for' 
ZBXNEXT-4361
 implemented new time range selector for graphs 
ZBXNEXT-4577
 improved performance of Zabbix server by replacing semaphores to pthread mutexes and read-write locks 
ZBXNEXT-4312
 reworked date picker; implemented keyboard interaction 
ZBXNEXT-2365
 added additional auto-registration operations and re-running of auto-registration actions if host metadata is modified 
ZBXNEXT-4569
 added support of MySQL 8.0 
ZBXNEXT-4565
 removed old upgrade DB patches 
ZBXNEXT-4320
 added ability to store history data in date based indices of elasticsearch 
ZBXNEXT-4526
 increased tags column size in Compact view mode 
ZBXNEXT-4528
 added link to Zabbix official support page 
ZBXNEXT-4520
 added values to boolean mapping: "ok, master" as 1 and "err, slave" as 0 
ZBXNEXT-4185
 added support of multiple items in "Plain text" widget 
ZBXNEXT-4163
 added support LLD, User macros and User macros with context from LLD macro in Items preprocessing 
ZBXNEXT-4415
 added new mode "Compact view" to the Problems page with ability to toggle highlighting whole row; added option to toggle timeline 
ZBXNEXT-2788
 added support for "NOT" keyword in custom expression fields 
ZBXNEXT-4516
 renamed dashboard widget and screen element "System status" to "Problems by severity" 
ZBXNEXT-4516
 renamed dashboard widget and screen element "Host status" to "Problem hosts" 
ZBXNEXT-4516
 renamed dashboard widget, screen element and report "Status of Zabbix" to "System information" 
ZBX-13376
 moved functionality to enable JMX interface in Java gateway to settings.sh and ensured setting TCP timeout 
ZBXNEXT-4458
 improved logging of Java gateway, added username/password validation for JMX items 
ZBXNEXT-4411
 added compression of server-proxy data exchange 
ZBXNEXT-4488
 added ability to push data via trapper to HTTP agent item type 
ZBXNEXT-4358
 added HTTP agent item type for data gathering via HTTP 
ZBXNEXT-4413
 dropped Monitoring->Triggers view 
ZBXNEXT-4413
 added the trigger context menu option to view or edit the trigger description 
ZBXNEXT-4413
 added displaying of the trigger dependencies in Monitoring->Problems view 
ZBXNEXT-4151
 added aria roles to provide easier access by keyboard navigation 
ZBX-3783
 added strict validation for apiinfo.version(), action.delete(), correlation.delete() and drule.delete() methods 
ZBX-3783
 prohibited deleting discovery rules which are used in actions 
ZBX-3783
 added audit for action.delete() and correlation.delete() methods 
ZBXNEXT-4143
 implemented submenu autofocus on top-level menu click 
ZBXNEXT-4414
 added support for configurable number of displayed tags 
ZBXNEXT-4313
 implemented keyboard interaction in context menus 
ZBXNEXT-4426
 added option to execute cached passive checks at the current time 
ZBXNEXT-4417
 added real time export of events, history and trends in newline delimited JSON format 
ZBXNEXT-4374
 implemented the widget configuration fields clearing when changing the type 
ZBXNEXT-4119
 implemented tag based permissions 
ZBXNEXT-4045
 implemented maximum size for graphs in widgets 
ZBXNEXT-4340
 added kiosk mode for dashboard 
ZBXNEXT-4150
 implemented access to interactive elements using keyboard 
ZBXNEXT-4149
 implemented keybord interaction in overlay popups 
ZBXNEXT-4357
 added support of "selectTriggerDiscovery" option in trigger.get method 
ZBXNEXT-4152
 replaced double box select fields with multiselect fields and added filtering by proxy and server only in host list 
ZBXNEXT-4273
 added default event status colors in themes with option to customize them 
ZBXNEXT-4216
 added 'copytruncate' log file rotation support for logrt[], logrt.count[] 
ZBXNEXT-4144
 added asterisk mark and aria-label property to all forms required fields 
ZBXNEXT-768
 added item unit blacklisting with character "!" in order to disable metric prefixes 
ZBXNEXT-4295
 added selection of the create images tickbox by default on "Maps import" page 
ZBXNEXT-1456
 added filter by item discovery status for item configuration view; thanks to Volker Fröhlich for the original patch 
ZBXNEXT-3991
 added additional params to net.if.* key output for linux base agent 
ZBXNEXT-3480
 added support of inventory macros in event tags 
ZBXNEXT-4175
 implemented ability to send email to several email addresses specified as user media 
ZBXNEXT-4139
 added high contrast light and high contrast dark themes 
ZBXNEXT-4247
 removed deprecated API methods: user.updareProfile, user.addMedia, user.updateMedia, user.deleteMedia, usergroup.massAdd, usergroup.massUpdate and usermedia.get 
ZBXNEXT-970
 added more detailed error information to notification message when DB is unavailable 
ZBXNEXT-4137
 removed green background from cells 
ZBXNEXT-4157
 added map status summary to be readable by screen reader software 
ZBXNEXT-4127
 implemented popup displaying in overlay dialogues 
ZBXNEXT-1520
 increased the maximum Hosts/DNS name character length from 63 to 255 
ZBXNEXT-4108
 implemented search of problems by trigger name 
ZBXNEXT-4143
 implemented keybord interaction in top navigation 
ZBXNEXT-1567
 added item "vfs.dir.count" for counting directory entries 
ZBXNEXT-4135
 added tooltips for vertical labels 
ZBXNEXT-4146
 added icons for error and success messages 
ZBXNEXT-4156
 added option to view graphs items data and multiple items graph data as table 
ZBXNEXT-4160
 reworked monitoring Discovery screen to show hint info right in the table cell 
ZBXNEXT-761
 added rules to make dbschema.c, schema.sql and data.sql from schema.tmpl, data.tmpl and templates.tmpl if there is a need to 
ZBXNEXT-4186
 added ability to adjust colors for new graph items in graph creation form according selected theme 
ZBXNEXT-4145
 fixed appearance of host column based on number of hosts specified in filter 
ZBXNEXT-4118
 implemented advanced options for tag-based search of problems 
ZBXNEXT-4134
 added 'lang' attribute to page body 
ZBXNEXT-4181
 fixed Zabbix server to accept active Zabbix proxy requests only from allowed address if specified 
ZBXNEXT-4181
 fixed passive Zabbix proxy to accept Zabbix server requests only from allowed address 
ZBX-10576
 restructured unixODBC related code, moved it to a dedicated directory 
ZBX-3783
 added strict validation for proxy.delete() method; proxy cannot be deleted when used in actions 
ZBX-11909
 replaced company.com with example.com in data.sql

Bug Fixes

ZBX-14853
 fixed error of vmware items caused by misconfigured vmware maxQueryMetrics parameter 
ZBXNEXT-4588
 fixed multiple minor issues in SVG graph widget; fixed dashboard widget height calculation 
ZBX-14891
 fixed undefined index "show_timeline" in screens 
ZBX-14874
 fixed SQL errors being generated in database log files 
ZBX-14783
 fixed align of the left column in several widgets and reports 
ZBX-13377
 fixed naming of groups and applications 
ZBX-14335
 fixed bug in proxy makefile 
ZBX-14850
 reverted ZBXNEXT-3848 fix because of broken update interval validation during low-level discovery 
ZBX-14830
 fixed possible deadlock when history syncer was trying to update escalations with recovery event id 
ZBX-13377
 fixed naming issue for "Server Hardware" host group 
ZBXNEXT-4573
 fixed HTTP authentication page issues, HTTP case sensitive option and moved HTTP authentication from API to HTTP form page 
ZBX-14721
 improved escalator performance by replacing previously unused index 
ZBX-14720
 improved history syncer performance during problem recovery by adding index on escalations table and avoiding full table scan 
ZBX-14821
 fixed full sync when only timer triggers are being processed, added trigger statistics to history syncer title 
ZBXNEXT-4588
 Fixed changelog adding more detailed description of features added in 4.0.0beta1; Fixed Data set widget field to be compatible with PHP versions affecting PHP bug #42355 
ZBX-14797
 fixed calendar initialization in graph configuration form 
ZBX-14812
 fixed hexadecimal to decimal preprocessing step to allow pairs of hexadecimal digits separated by space or new line 
ZBX-14496
 fixed unauthorized request error when sorting list after enabling/disabling elements 
ZBX-14808
 fixed SQL error in user permission check when processing actions for internal item events 
ZBX-14614
 fixed server template linking with triggers having no dependencies 
ZBXNEXT-4597
 fixed date selection fields in maintenance and services: fixed accepted date format, fixed validation and added placeholdrs 
ZBX-6565,ZBX-13645,ZBX-14559
 fixed agent on AIX 6.1 TL0, 7.1 TL0: system.stat[memory,avm], compilation, crash on net.dns[] items 
ZBX-12217
 removed links to templates with no permissions for templated discovery rules and item prototypes 
ZBX-13015
 fixed X axis labels with DST transition in the displayed period 
ZBX-14777
 increased severity of housekeeper logs in the case of invalid history/trends intervals 
ZBX-14778
 fixed housekeeper attempting to remove history of discovery rules/prototypes 
ZBX-14771
 fixed memory leak in poller if scheduling interval is invalid 
ZBX-14462
 improved time selection when opening calendar with missing time 
ZBX-14775
 fixed configuration of the maximum available count of aggregated metrics in a single request to vmware vCenter 
ZBX-14637
 fixed unreadable text on the problems widgets in dark theme 
ZBX-14676
 fixed displaying links containing UTF-8 characters 
ZBX-14751
 fixed "cannot run test program while cross compiling" and "cannot check for file existence when cross compiling" errors during cross-compilation 
ZBX-14677
 fixed vmware performance counter retrieval on installations with large number of datastores 
ZBXNEXT-4500
 fixed item prototype master item links leading to error when master item is a web item 
ZBX-14697
 fixed memory leak in alert manager when connection to database was lost 
ZBX-14629
 fixed breadcrumb labels clipping 
ZBX-14628
 fixed empty MAIL FROM in email alerts 
ZBX-14696
 changed problem_tag index to optimize database queries 
ZBX-12293
 renamed trigger functions by adding function name at the beginning and removing the operator and "N" and placing operator in a separate field allowing two new operators "<=" and ">=" for selection 
ZBX-9731
 changed value cache to drop unused items from cache when new values are added instead performing this cleanup only when cache runs out of free space 
ZBX-14593
 fixed error message for invalid vmware endpoint 
ZBX-14614
 fixed trigger dependency link to the template instead of the host during the discovery action 
ZBX-372
 added "zone" parameter to proc.num[] item for Solaris 
ZBX-14631
 fixed typo in string: ouf, not out 
ZBX-14410
 fixed output of information about the error for expressions with functions of triggers or calculated items 
ZBX-14341
 fixed duplicate value generation in environments with poor connectivity 
ZBX-9913
 fixed inconsistencies in behaviour and error messaging of trigger functions 
ZBX-14448
 fixed undefined index when updating item and switching type to dependent 
ZBX-14670
 fixed failed query error in LLD when updating function name in trigger prototype expression 
ZBX-14433
 fixed several problems in displaying of X axis on the graphs 
ZBX-14579
 improved several functions to distinguish between 'failed to compile' and 'not matched' states in regexp processing 
ZBX-14584
 fixed mass update some options for items 
ZBX-12217
 removed links to templates with no permissions for templated applications and items 
ZBXNEXT-4607
 removed column Recovery time in Problems mode 
ZBX-14548
 fixed the disk usage counters reading for ESX/ESXi hosts 
ZBXNEXT-4049
 fixed option to hide timeline in Problems widget popup 
ZBX-13393
 fixed agent compilation error on AlphaServer Tru64 5.1B 
ZBX-14491
 fixed link "show value mappings", which leads to no permission page 
ZBX-13165
 fixed Y-axis small value gradation issue in graphs 
ZBX-14575
 fixed Norwegian locale key for windows 
ZBX-14566
 fixed possible data loss due to MariaDB server restart 
ZBX-13010
 fixed crash of poller processes in ODBC checks, simplified code 
ZBX-14370
 fixed deleting of files after compiling a program (make clean) for Solaris 
ZBX-14519
 fixed displaying timeline points of days in Problems widget 
ZBX-12380
 improved function parameter parsing for trigger functions 
ZBX-12994
 improved maintenance period translation strings in maintenance form 
ZBXNEXT-4622
 updated change severity action icons in sprite files 
ZBX-14426
 fixed trigger color in host issues screen and host group issues screen, color of problem with highest severity generated by trigger is used instead of trigger color 
ZBX-13396
 moved time function based trigger processing to history syncer, reducing trigger locking issues caused by peak timer processing loads 
ZBX-13651
 fixed cloning a template using the "Full Clone", which does not hide the upper level navigation bar 
ZBX-14425
 color of problem with highest severity generated by trigger is used as trigger status color on data overview page 
ZBX-8051
 fixed auto-logout problem caused by async calls to jsrpc 
ZBX-13641
 disabled preprocessing update for discovered items 
ZBX-13381
 fixed invisible color picker selector, fixed wrong color preview, extended color pallette 
ZBX-14410
 improved error message handling in zbx_function_find() 
ZBX-14500
 fixed crash when reporting unknown triggers and using $1-$9 macros at the same time 
ZBX-14525
 fixed sorting by severity in Monitoring->Problems and Problems widget 
ZBX-12580
 reworked problem hosts widget to source data from problems and take changed severity into account 
ZBX-14537
 fixed HTTP agent application/json Content-Type not being set by default when using custom headers 
ZBX-12104
 added limit ZBX_HISTORY_PERIOD for {ITEM.VALUE} macro resolving in trigger name 
ZBX-14359
 changed problem name macro in default action subject and message from TRIGGER.NAME to EVENT.NAME 
ZBX-13718
 fixed selection of cached checkboxes in checkbox range library 
ZBX-13647
 fixed defined default discovery action message 
ZBX-12115
 changed API returned lastvalue and prevvalue for text based items with no values 
ZBX-14409
 fixed icon mapping expression validation 
ZBX-14402
 fixed internal item parameter that does not match documentation 
ZBX-11989
 fixed condition operators for event correlation rules 
ZBX-13779
 fixed redirect button link in multiple places 
ZBXNEXT-4361
 fixed selected breadcrumbs item style; fixed active time range tabs hover cursor style 
ZBX-14420
 fixed link to Problems screen in map element's context menu 
ZBX-12957
 removed time adjustment of received packets for server and proxy 
ZBX-12171
 added missing items zabbix[process,vmware collector,avg,busy] and zabbix[vmware,buffer,pfree] to Template App Zabbix Proxy 
ZBX-14388
 fixed log message about full history cache 
ZBX-13283
 removed info label in Trigger severities and Users administration pages 
ZBX-6046
 fixed the functions 'net.if.*' for Solaris with empty 64 bits counters 
ZBX-13355
 fixed media type a required password field successfully passing validation while being empty and prevented auto-filling stored passwords by browser 
ZBX-13701
 fixed hintbox multiplication on page refresh 
ZBX-14398
 improved "Server" parameter description in Zabbix agent configuration file 
ZBX-14344
 fixed host groups, hosts and applications not being taken into account when filtering problems by problem name in Monitoring->Problems view 
ZBX-11434
 added error messages when creation of LLD SNMP items fails due to SNMP OID field 
ZBX-12250
 fixed logrt[] item to analyze log file from start if no log files match and no log files were seen before 
ZBX-13765
 fixed discovered host status update if it was down and a service was discovered on that host 
ZBX-12070
 fixed "proc.num" and "proc.mem" items calculation of values when zabbix_agentd called in test mode 
ZBX-14423
 fixed use of initialized variable during application discovery 
ZBX-12990
 improved "vmware.hv.datastore.size" through usage the performance counters 
ZBXNEXT-4540
 fixed problems filter with same tags not being joined with OR condition 
ZBXNEXT-4576
 unified dashboard widget content margins 
ZBX-12965
 - fixed scheduled check calculation during daylight saving changes 
ZBX-13712
 fixed "Undefined index: master_itemid" and SQL errors in item.update and itemprototypr.update methods; fixed updating of discovered items 
ZBX-14329
 fixed error opening map's submap 
ZBX-13549
 fixed displaying of not monitored triggers in maps 
ZBX-13783
 dropped support for Zapcat-style and multi-level parameter arrays from item key validation in frontend 
ZBX-12359
 fixed "Automatic icon selection" checkbox not working and displaying two icons at once in map constructor 
ZBX-12239
 fixed global search form allowing to submit empty search queries 
ZBX-12177
 renamed "Icon" to "Map element" in Network map properties and constructor 
ZBX-14333
 fixed {ESC.HISTORY} and action log not to display colon without target host when executed on Zabbix server 
ZBX-14345
 fixed lock wait timeout error handling on MySQL to avoid possible data loss 
ZBX-13361
 fixed error messages when configuring an existing item to have an update interval 
ZBX-14328
 improved logging of command execution failures 
ZBX-13803
 fixed "make install" to respect DESTDIR variable, this is essential for packaging 
ZBX-12603
 fixed tab navigation and keyboard interaction in dashboard sharing and properties dialogues; added validation inside popups 
ZBX-13043
 removed error message for when user has defined media but all of them are disabled 
ZBX-14312
 fixed possible deadlock in history syncer when housekeeper is deleting events 
ZBX-13697
 fixed session expiration when changing default authentication method 
ZBX-13768
 fixed disabled 'add' button showing in templated item preprocesing form 
ZBX-13680
 fixed action not being cloned due to existing operation id being submitted 
ZBX-13775
 fixed map tree widget border color 
ZBX-13780
 fixed status color styles 
ZBX-12350
 fixed severity picker styles 
ZBX-13782
 fixed decoding of Unicode characters in JSON 
ZBX-13767
 fixed "undefined index: acknowledges" error on problems page 
ZBX-12175
 fixed subfilter entries with long names going off the screen 
ZBX-12644
 fixed filter being partially reset when using pagination in availability report page 
ZBX-12390
 fixed problem when triggers might not use correct value if an item values within one second were received in wrong historical order 
ZBX-13788
 fixed host availability stuck in unknown state after proxy changes 
ZBX-14313
 fixed trigger level correlation when multiple tags are set 
ZBX-12372
 fixed duplication of prefix "/" for second parameter "path" in items "web.page.*" 
ZBX-14315
 fixed validation of "max_depth" in "vfs.dir.size" for agent 
ZBX-13778
 fixed logically dead code in JSON Path parser 
ZBX-14337
 fixed persistent xss in map navigation tree widget 
ZBX-14336
 fixed persistent xss vulnerability in services 
ZBX-13750
 fixed hover and focus style for edit dashboard cancel button, improved top nav css coding style 
ZBX-13694
 disable check now for items with scheduler configuration errors 
ZBX-9882
 removed Zapcat-style and multi-level array type support in item key parameters 
ZBX-12821
 fixed multiple javascript memory leaks 
ZBX-13755
 fixed proxy lastaccess update on 32-bit Zabbix server 
ZBX-12425
 fixed selection of web items in the "Plain text" screen element 
ZBX-13781
 fixed CRLF injection in Zabbix Agentd 
ZBX-13737
 fixed invalid confirmation message when mass enabling and disabling trigger, item and host prototypes 
ZBX-13766
 fixed comparison of two large float numbers in expressions 
ZBX-13481
 fixed incorrect parsing of BITS data type in SNMP response 
ZBX-13744
 fixed potential shared memory leak when item is removed 
ZBX-13742
 fixed parsing of the operator "not" in trigger expression 
ZBX-13535
 fixed trigger recovery expression for 'High error rate' trigger 
ZBX-13278
 fixed trigger expression for 'Link down' trigger 
ZBX-12805
 increased command line limit for proc.num checks on hp-ux systems 
ZBX-13749
 fixed creation of dependent items from item wizard 
ZBX-13660
 fixed data types passed to is_ushort() for converting PID, port and process number 
ZBX-12935,ZBX-13539
 fixed displaying of floating point values under the "Latest data" page 
ZBX-13579
 fixed unnecessary data getting when agent becomes available in the non-collection data period 
ZBX-13240
 removed duplicating HTML IDs from frontend and fixed SID validation in trigger wizard 
ZBX-13685
 fixed maintenance entries displayed in list when filter is applied 
ZBX-12756
 improved configure script to check iconv library 
ZBX-13667
 added notification in zabbix server log about 'error' in elasticsearch json response 
ZBX-13683
 fixed multiselect items not being sorted by name 
ZBX-13299
 fixed autoregistration, discovery and internal notifications not being sent due to uninitialized severity 
ZBX-13607
 changed ping script to return success also for timeouts 
ZBX-12967
 fixed slide show refresh interval multiplier menu not working 
ZBX-13696
 added maximum record limit to old session removal in housekeeper 
ZBX-13642
 fixed undefined index in user edit form 
ZBX-13546
 fixed context menu positioning in maps 
ZBX-13668
 fixed dynamic widget searching for item key in item prototypes 
ZBX-13500
 fixed fractional values in triggers being misinterpreted without a leading 0 
ZBX-13561
 fixed incorrectly displayed pie graph when first item has no data 
ZBX-13517
 fixed undefined index in pie charts 
ZBX-13499
 fixed checkbox selector in problems table 
ZBX-13598
 fixed crash when Zabbix process cannot connect to preprocessing service 
ZBX-13522
 fixed duplicate IDs in trigger expression constructor 
ZBX-13489
 fixed wrong tab iteration inside graph widget 
ZBX-13625
 fixed blinking in the problem widget 
ZBX-13560
 fixed acknowledge notifications being visible in the event popup 
ZBX-13298
 fixed missing graph after faulty graph edit form submission 
ZBX-13487
 improved widgets menu icons focus state styles 
ZBX-13350
 added multiple Zabbix element default paths to output after running ./configure and --help option 
ZBX-13509
 improved compilation support from source for Solaris and NetBSD 
ZBX-13542
 fixed http steps on template not inheriting hosts application setting 
ZBX-13618
 fixed wrong variables order in translatable error message 
ZBX-13344
 fixed trigger based actions having a default "not in maintenance" condition 
ZBX-13613
 improved a history syncer when backend elasticsearch is not available 
ZBX-13510
 fixed error of execution "make dbschema" for NetBSD 
ZBX-13544
 fixed agent crashes when using regex with 'Log' item for Mac OSX 
ZBX-13611
 fixed lld rules not always saving their state/error message changes 
ZBX-13571
 fixed regression that resulted in slow history data queries on partitioned tables 
ZBX-13490
 fixed autofocus in forms 
ZBX-13470
 improved searching IPMI items by full name 
ZBX-13566
 fixed create dashboard button size in dashboard list 
ZBX-13464
 fixed fullscreen attribute included in host context menu links 
ZBX-13424
 added possibility to select web items as master items and improved copying of dependent items to destination hosts and templates 
ZBX-13573
 fixed undefined index message changing Action "Acknowledgment operations" from "Remote command" to "Notify all involved" 
ZBX-13570
 fixed undefined index in API call 
ZBX-13331
 removed "recovery" property from action.get API method response 
ZBX-13309
 fixed displaying of Problem/Recovery time 
ZBX-13450
 fixed server and proxy compilation problem for Solaris 10 
ZBX-13458,ZBX-13494
 fixed resolving of the macros in map labels for non-superadmin users 
ZBX-13526
 fixed widget placeholder jumping instead of resizing while dashboard edit 
ZBX-13362
 fixed potentially wrong rows deleting by housekeeper in PostgreSQL 
ZBX-13506
 fixed linked trigger is moved to sibling map element 
ZBX-13586
 fixed trigger-based event correlation - suspend creation of event if no problems are recovered by it 
ZBX-13339
 improved deallocation of memory 
ZBX-13412
 fixed JS error and wrong form behaviour when changing item type, type of information 
ZBX-13471
 fixed contrast in selected item filters 
ZBX-13428
 fixed long name of map outside go back button in map widget 
ZBX-13340
 fixed pie graphs displaying incorrect data 
ZBX-13257
 fixed display of the latest item in Audit log 
ZBX-13447
 fixed trigger name readability on map in dark theme 
ZBX-11994
 changed "awk" to "sed" for getting info about "Last Changed Revision" 
ZBX-13360
 fixed HTML5 placeholder color that previously appeared like actual input data 
ZBX-13351
 improved OpenSSL error messages 
ZBX-13147
 fixed inconsistent number on map navigation tree 
ZBX-13537
 fixed "Inaccessible user" in Dashboard System status widgets acknowledgement popup 
ZBX-13472
 fixed description of "Server" and "ServerActive" configuration options 
ZBX-13455
 added frontend error message when templates cannot be linked to LLD host 
ZBX-13538
 fixed example configuration for Elasticsearch 
ZBX-13434
 fixed incorrect trigger dependencies being set after copying triggers to multiple hosts; thanks to Kotaro Miyashita for the patch 
ZBX-13513
 fixed input maxlength for users media of type script 
ZBX-13523
 fixed error message for empty TCP response in case agent dropped connection because of access permissions 
ZBX-12883
 fixed incorrect ordering the list of triggers after saving a map 
ZBXNEXT-4150
 fixed URL display in hint box and focus styles for radio buttons 
ZBX-12940
 fixed content does not fit dialog window 
ZBX-13342
 fixed order by query in frontend Maintenance tab 
ZBX-13401
 fixed successful items mass update with invalid update interval 
ZBX-6167
 fixed partial updating in maintenance.update 
ZBX-13062
 banned using of mutex in threads of metrics collection 
ZBX-13236
 fixed error message of function parameters parse 
ZBX-10433
 removed inaccurate configuration default values 
ZBX-13398
 fixed configure script for Debian GNU/Linux "buster" and "sid" to work with PostgreSQL 
ZBX-12754
 fixed undefined index error in map import 
ZBX-13303
 improved display of user media 'Use if severity' indicators 
ZBX-13166
 fixed daily and yearly notification reports not including current day/last day of leap-year 
ZBX-13118
 improved readability of emails in action log by splitting them multiline 
ZBX-13498
 added optional MySQL upgrade patch for "problem" table to drop redundant index after another index that can be used to enforce the foreign key constraint has been created 
ZBX-13430
 fixed use of uninitialized value ttl when elasticsearch is configured 
ZBX-13452
 fixed Elasticsearch history storage default value types 
ZBX-13248
 fixed field trapper_hosts to optional for trapper item.create 
ZBX-13307
 fixed map scaling and position to the widget left side 
ZBX-12941
 fixed checkbox overlay's position over the checkbox 
ZBX-13465
 fixed back button style on the sub-maps 
ZBX-13334
 fixed translations of Widget parameters window 
ZBX-6118
 fixed poor performance of changing an item on the template which linked with many hosts 
ZBX-13454
 fixed placeholder in Administration->Scripts form 
ZBX-13403
 allowed proxy to execute remote commands on agents using encrypted connection 
ZBX-13441
 fixed crashes in case of failures (e.g. timeouts) during VMware hypervisor discovery 
ZBX-12607
 fixed performance of map.get API method and map-related views 
ZBX-11391
 generated an error if expanding LLD macros results in an empty tag name 
ZBX-13300
 fixed addJsFile() name 
ZBX-13030
 removed proxy's ability to export unprocessed history data via loadable modules 
ZBXNEXT-3581
 dropped plain text protocol support and made header mandatory; fixed IP fragmentation handling by including header in Zabbix get request, Zabbix server/proxy passive check request and frontend request to Zabbix server 
ZBX-13194
 fixed incorrect processing of zabbix[wcache,value,*] internal check 
ZBX-13060
 added limitation for meaningless server reconnection attempts to incorrectly configured passive proxy 
ZBX-13233
 added new memory metrics for Linux platform - "active", "anon", "inactive" and "slabs"; thanks to Tomasz Kłoczko for the original patch 
ZBX-12643
 improved error log message in case Zabbix server database cannot be used due to empty "users" table 
ZBX-11720
 fixed memory leak which breaks vfs.fs.size, vfs.fs.inode and vfs.dir.size items if compiled with LeakSanitizer 
ZBX-13131
 fixed truncated multiline text values from network discovery SNMP checks 
ZBX-13117
 fixed vfs.dir.size with symbol links on Windows 
ZBX-12045
 fixed inconsistencies in configure -h output 
ZBX-13325
 fixed trend.get() method with Oracle backend 
ZBX-13223
 fixed graphs duplication in graph preview 
ZBX-13345
 removed SID from URL in screen edit mode 
ZBX-13055
 fixed problems with DNS resolver interface on NetBSD 
ZBX-13214
 added support of \0 matching group for regsub and iregsub methods 
ZBX-13208
 eliminated race condition that caused history collection for newly created items to start before preprocecessing steps finished syncing 
ZBX-13246
 fixed processing of command line arguments which are longer than 2KB for proc.num and proc.mem items on AIX 
ZBX-13130
 fixed Zabbix proxy not to generate high network traffic when server does not accept data 
ZBX-13288
 fixed image ghosting for mass update of map elements 
ZBX-11422
 fixed compilation warnings under OS X 64bit 
ZBX-13276
 fixed compatibility issue with Elasticsearch versions starting from 6.0 
ZBX-13196
 fixed setting of transaction error flag in commit operation 
ZBX-13221
 fixed trimming of values in overlay dialogues 
ZBX-13221
 added "Timeout" validation in web scenario step overlay dialogue 
ZBX-12389
 fixed latest data host group filter 
ZBX-13119
 removed 'empty' button in trigger selection window for map constructor item modal form 
ZBX-12661
 fixed Low-level discovery of dependent items not working after being edited and resulting in undefined offset error or foreign key constraint violation 
ZBX-13254
 fixed 'skip' parameter behaviour for log[], log.count[], logrt[], logrt.count[] items in case log files initially do not exist 
ZBX-13253
 fixed losing the 1st record by log[] and logrt[] items if 'skip' parameter is used and log file initially is empty 
ZBX-13275
 fixed slow housekeeping of events on MySQL 
ZBX-13264
 fixed Zabbix agent compilation on OS/X 
ZBX-13245
 fixed IP fragmentation handling in Zabbix server response to Zabbix proxy 
ZBX-13258
 fixed misaligned user group permission controls 
ZBX-13031
 fixed Java gateway compilation without libpcre 
ZBX-12963
 fixed passing argument to external check item that contain literal $ 
ZBX-12991
 removed default values for "active_since" and "active_till" fields in maintenance.create API method 
ZBX-13270
 fixed default selection of the required host permissions radio in the global scripts form 
ZBX-12758
 fixed slow housekeeping of events due to missing index on foreign key 
ZBX-11305
 fixed color and label for event status on event details page 
ZBX-13238
 fixed spelling of Elasticsearch 
ZBX-13056
 fixed incorrect positioning of context menu when it is opened using keyboard 
ZBX-13241
 fixed memory leak on Zabbix server when executing remote commands through proxy 
ZBXNEXT-4139
 fixed displaying of the eventlog severitites and severities in trigger map element 
ZBX-13178
 fixed ipc_path value in error message 
ZBX-12251
 fixed possibility of trigger status getting stuck in PROBLEM or OK state due to transaction error in history synchronization, added deadlock to a list of recoverable errors 
ZBX-12251
 fixed possibility that new history values are lost and not processed by Zabbix server or Zabbix proxy due to recoverable transaction error 
ZBX-12996
 fixed radio button and label inconsistency in maintenance period configuration 
ZBX-12895
 improved performance of DB patch for updating data in the alerts table 
ZBX-12082
 fixed possibility to select triggers with same name in multiselect 
ZBX-12983
 fixed compilation warnings under Windows 
ZBX-10578
 fixed redundant init_result() calls; thanks to MATSUDA Daiki for the patch 
ZBX-12793
 fixed system compiler checks during source configuration 
ZBX-11970
 fixed style for some enumerators and structure type declarations

Installation and Upgrade Notes

Installation

See Zabbix Manual for full details.

Upgrade

Recompile Zabbix binaries and update front-end PHP files. Execute a database patch if migrating from Zabbix 1.8.x. See Zabbix Manual for a detailed upgrade procedure.

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.

References

Zabbix 4.0 Manual

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