Release Notes for Zabbix 4.0.0beta1

28 August 2018

Zabbix Team is pleased to announce the availability of Zabbix 4.0.0beta1.

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 4.0.0beta1. Download it from download.

The following sections describe the release in details and provide late-breaking or other information that supplements its main documentation.

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New Features and Improvements

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

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Bug Fixes

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 itemprototype.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

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Installation and Upgrade Notes

Installation

See Zabbix documentation for full details.

Upgrade

Recompile Zabbix binaries and update front-end PHP files. 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.

• Zabbix Enterprise Support
• Zabbix Training
• Zabbix Development Services

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References

Zabbix 4.0 Manual