Release Notes for Zabbix 4.0.0alpha9

23 July 2018

Zabbix Team is pleased to announce the availability of Zabbix 4.0.0alpha9.

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 4.0.0alpha9. Download here.

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-4558	Added support for monitoring the string values of custom JMX MBeans Java gateway
ZBX-14586	Added more informative error message for InstanceNotFoundException error Java gateway
ZBXNEXT-4454	Added screen reader attributes for common elements Frontend
ZBXNEXT-4200	Added ability to create LLD item prototype of type "dependent" with a master item not only item prototype API Frontend Server
ZBXNEXT-1701	Added support of regular expressions and global regular expressions to "logsource()" trigger function Server
ZBXNEXT-4586	Added support of macros {ITEM.VALUE} and {ITEM.LASTVALUE} to trigger URL Server
ZBXNEXT-4049	Added checkbox to hide timeline when problems sort by time Frontend
ZBX-1357	Added and enabled Norwegian translation to be displayed by default API Frontend
ZBXNEXT-4367	Added screen reader features for multiselect Frontend
ZBXNEXT-4530	Implemented changeable session cookie name Frontend
ZBXNEXT-4446	Added ability to change severity of previously generated problems API Frontend Installation Proxy Server
ZBXNEXT-4044	Changed default values of 'Display OK triggers for' and 'On status change triggers blink for' Frontend Installation
ZBXNEXT-4361	Implemented new time range selector for graphs Frontend
ZBXNEXT-4577	Improved performance of Zabbix server by replacing semaphores to pthread mutexes and read-write locks Agent Installation Proxy Server
ZBXNEXT-4312	Reworked date picker; implemented keyboard interaction Frontend
ZBXNEXT-2365	Added additional auto-registration operations and re-running of auto-registration actions if host metadata is modified Frontend Proxy Server
ZBXNEXT-4569	Added support of MySQL 8.0 API Frontend Installation Proxy Server
ZBXNEXT-4565	Removed old upgrade DB patches Installation
ZBXNEXT-4320	Added ability to store history data in date based indices of elasticsearch Frontend Server
ZBXNEXT-4526	Increased tags column size in Compact view mode Frontend
ZBXNEXT-4528	Added link to Zabbix official support page Frontend
ZBXNEXT-4520	Added values to boolean mapping: "ok, master" as 1 and "err, slave" as 0 Server
ZBXNEXT-4185	Added support of multiple items in "Plain text" widget Frontend
ZBXNEXT-4163	Added support LLD, User macros and User macros with context from LLD macro in Items preprocessing Server
ZBXNEXT-4415	Added new mode "Compact view" to the Problems page with ability to toggle highlighting whole row; added option to toggle timeline Frontend
ZBXNEXT-2788	Added support for "NOT" keyword in custom expression fields API Frontend Server
ZBXNEXT-4516	Renamed dashboard widget and screen element "System status" to "Problems by severity" Frontend
ZBXNEXT-4516	Renamed dashboard widget and screen element "Host status" to "Problem hosts" Frontend
ZBXNEXT-4516	Renamed dashboard widget, screen element and report "Status of Zabbix" to "System information" Frontend
ZBX-13376	Moved functionality to enable JMX interface in Java gateway to settings.sh and ensured setting TCP timeout Installation Java gateway
ZBXNEXT-4458	Improved logging of Java gateway, added username/password validation for JMX items API Java gateway
ZBXNEXT-4411	Added compression of server-proxy data exchange API Frontend Installation Proxy Server
ZBXNEXT-4488	Added ability to push data via trapper to HTTP agent item type API Frontend Installation Proxy Server
ZBXNEXT-4358	Added HTTP agent item type for data gathering via HTTP API Frontend Agent Installation Proxy Server
ZBXNEXT-4413	Dropped Monitoring->Triggers view Frontend
ZBXNEXT-4413	Added the trigger context menu option to view or edit the trigger description Frontend
ZBXNEXT-4413	Added displaying of the trigger dependencies in Monitoring->Problems view Frontend
ZBXNEXT-4151	Added aria roles to provide easier access by keyboard navigation Frontend
ZBX-3783	Added strict validation for apiinfo.version(), action.delete(), correlation.delete() and drule.delete() methods API
ZBX-3783	Prohibited deleting discovery rules which are used in actions API
ZBX-3783	Added audit for action.delete() and correlation.delete() methods API
ZBXNEXT-4143	Implemented submenu autofocus on top-level menu click Frontend
ZBXNEXT-4414	Added support for configurable number of displayed tags Frontend
ZBXNEXT-4313	Implemented keyboard interaction in context menus Frontend
ZBXNEXT-4426	Added option to execute cached passive checks at the current time API Frontend Installation Server
ZBXNEXT-4417	Added real time export of events, history and trends in newline delimited JSON format Server
ZBXNEXT-4374	Implemented the widget configuration fields clearing when changing the type Frontend
ZBXNEXT-4119	Implemented tag based permissions API Frontend Installation Server
ZBXNEXT-4045	Implemented maximum size for graphs in widgets Frontend
ZBXNEXT-4340	Added kiosk mode for dashboard Frontend
ZBXNEXT-4150	Implemented access to interactive elements using keyboard Frontend
ZBXNEXT-4149	Implemented keybord interaction in overlay popups Frontend
ZBXNEXT-4357	Added support of "selectTriggerDiscovery" option in trigger.get method API
ZBXNEXT-4152	Replaced double box select fields with multiselect fields and added filtering by proxy and server only in host list API Frontend
ZBXNEXT-4273	Added default event status colors in themes with option to customize them Frontend Installation
ZBXNEXT-4216	Added 'copytruncate' log file rotation support for logrt[], logrt.count[] Agent
ZBXNEXT-4144	Added asterisk mark and aria-label property to all forms required fields Frontend
ZBXNEXT-768	Added item unit blacklisting with character "!" in order to disable metric prefixes Frontend Server
ZBXNEXT-4295	Added selection of the create images tickbox by default on "Maps import" page Frontend
ZBXNEXT-1456	Added filter by item discovery status for item configuration view; thanks to Volker Fröhlich for the original patch Frontend
ZBXNEXT-3991	Added additional params to net.if.* key output for linux base agent Agent
ZBXNEXT-3480	Added support of inventory macros in event tags Server
ZBXNEXT-4175	Implemented ability to send email to several email addresses specified as user media API Frontend Installation Server
ZBXNEXT-4139	Added high contrast light and high contrast dark themes Frontend Installation
ZBXNEXT-4247	Removed deprecated API methods: user.updareProfile, user.addMedia, user.updateMedia, user.deleteMedia, usergroup.massAdd, usergroup.massUpdate and usermedia.get API
ZBXNEXT-970	Added more detailed error information to notification message when DB is unavailable Server
ZBXNEXT-4137	Removed green background from cells Frontend
ZBXNEXT-4157	Added map status summary to be readable by screen reader software Frontend
ZBXNEXT-4127	Implemented popup displaying in overlay dialogues Frontend
ZBXNEXT-1520	Increased the maximum Hosts/DNS name character length from 63 to 255 Agent Installation Proxy Server
ZBXNEXT-4108	Implemented search of problems by trigger name Frontend Server
ZBXNEXT-4143	Implemented keybord interaction in top navigation Frontend
ZBXNEXT-1567	Added item "vfs.dir.count" for counting directory entries Agent
ZBXNEXT-4135	Added tooltips for vertical labels Frontend
ZBXNEXT-4146	Added icons for error and success messages Frontend
ZBXNEXT-4156	Added option to view graphs items data and multiple items graph data as table Frontend
ZBXNEXT-4160	Reworked monitoring Discovery screen to show hint info right in the table cell Frontend
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 Installation
ZBXNEXT-4186	Added ability to adjust colors for new graph items in graph creation form according selected theme Frontend Installation
ZBXNEXT-4145	Fixed appearance of host column based on number of hosts specified in filter Frontend
ZBXNEXT-4118	Implemented advanced options for tag-based search of problems API Frontend Installation
ZBXNEXT-4134	Added 'lang' attribute to page body Frontend
ZBXNEXT-4181	Fixed Zabbix server to accept active Zabbix proxy requests only from allowed address if specified API Frontend Proxy Server
ZBXNEXT-4181	Fixed passive Zabbix proxy to accept Zabbix server requests only from allowed address Proxy
ZBX-10576	Restructured unixODBC related code, moved it to a dedicated directory Installation Proxy Server
ZBX-3783	Added strict validation for proxy.delete() method; proxy cannot be deleted when used in actions API
ZBX-11909	Replaced company.com with example.com in data.sql Installation

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Bug Fixes

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

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Installation and Upgrade Notes

Installation

See Zabbix documentation for full details.

Upgrade

See Upgrade procedure for upgrade options and instructions. For version specific upgrade notes, see Upgrade notes for 4.0.0.

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