Release Notes for Zabbix 4.0.0beta1

28 Aug 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 downloads.

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 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.

• Zabbix Enterprise Support
• Zabbix Training
• Zabbix Development Services

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References

Zabbix 4.0 Manual