Server

• [Cluster] various stability improvements
• [Cluster] fixed possible socket leaks in FollowerAmbassador and CandidateAmbassador
• [Cluster] large snapshot installation will be done via file from now on to not hold the connection and avoid encountering read timeout
• [Backup] fixed possible memory leak during export that could cause decreased speed of export
• [Backup] fixed a possibility of creating duplicate backups
• [Backup] fixed possible failure when doing snapshot and incremental backup when encryption is set
• [Backup] optimized restoring from Google Storage process
• [Backup] added support for backup retention policy on Azure
• [Indexing] fixed updates of Reference documents when OutputReduceToCollection is set
• [Indexing] OutputReduceToCollection should not create new side-by-side instances after server restart
• [Indexing] processing speed will include side-by-side indexes and only when index is running
• [Indexing] separating MapReferenceSuccesses in statistics from MapSuccesses
• [Indexing] handling nested null propagation operators and null conditional access
• [Migration] added a support for case sensitive collations
• [Monitoring] added server certificate expiration endpoint to SNMP
• [Monitoring] added time since oldest backup endpoint to SNMP
• [Monitoring] added the ability to disable time window checks that are problematic for some monitoring software
• [Patching] exposing @change-vector in metadata
• [Replication] preventing double dispose of replication handler which could cause a replication to stop completely in some cases
• [Replication] fixed possibility for a deadlock of Replication by Tombstone Cleaner

Client API

• [Commands] added support for Broadcasting along with 'FirstBroadcastAttemptTimeout' and 'SecondBroadcastAttemptTimeout' conventions
• [Conventions] added 'HttpVersion' convention with HTTP/1.1 as a default
• [Operations] handling properly server down when waiting for an operation
• [Projections] support for IDictionary in JavaScript projections
• [Projections] added support from projecting from a dictionary when dictionary key has a comma inside
• [Projections] support for projecting null array
• [Querying] fixed issue with creating a query on Id field when OrderBy is used
• [Session] Load should not throw when 'NoTracking' is enabled and document does not exist on the server
• [Subscriptions] added ToSubscriptionCreationOptions that allows to convert from generic to non-generic subscription

Studio

• [Database] added the ability to modify database record
• [Documents] fixed issue with adding same attachment which would not trigger popup window
• [Indexing] allow to filter indexes that has errors

Tools

• [Recovery] better error handling when recovering encrypted storage without encryption key

Server

• [AuditLog] Avoid throwing ObjectDisposed during audit logging if the socket was closed
• [Backup] Fixed issue that an idle database wakes up but doesn't run backup
• [Indexing] Fixed error logging if there was an error in the referenced document
• [Indexing] Fixed saving of reduce documents to OutputToReduceCollection (System.FormatException: Bad variable size int)
• [Replication] Handled a conflict should take into account the unused databases
• [SNMP]Fixed database startup load due to exceptions thrown by SNMP watcher
• [Subscriptions] Handled passive nodes during subscription connection
• [Subscriptions] Improved mechanism to move between nodes in case we don't know what the responsible node should be
• [Subscriptions] Added timeout when there is compare exchange subscription substitution concurrency to prevent a partial live lock
• [Subscriptions] Fixed double dispose resulting in unexpected signaling of ConnectionInUse
• Fixed versions of dependency DLLs
• Updated to .NET Core 2.2.8

Client

• Added XMLdocs to the NuGet pckaged
• Disabled MaxIdleTime of ServicePoint

Server

• [Backup] Backup task will delete the .in-progress file when it fails
• [Backup] Avaliable space validation before the backup
• [Cluster] Fixed node kicked out of the cluster if the we have election timeout mismatch
• [Cluster] Added ability to specify topology priority order
• [Configuration] Increased default value of Databases.ConcurrentLoadTimeoutInSec setting from 10 to 60 seconds
• [Indexing] Added ability to define pattern for reference documents of OutputToCollection docs generated by map-reduce indexes
• [Indexing / Voron] Fixed unhandled case of leafs compression which resulted in map-reduce indexing error
• [JSON] Fixed memory overlap on ID slice creation, when we have two or more control characters in a row
• [Replication] Fixed replication looping when having faulty replication configuration with two replication channels from the same source to the same destination
• [Revisions] Allow to define separate conflict revision configuration
• [Stats] Exposed IO metrics for the system storage

Client

• [Index Definition] Fixed needless usage of ToDictionary() for simple calls
• [Index Definition] Fixed missing int cast on method call arguments
• [Operations] Synchronization of database name validation between Client API and server side
• [Operations] Added ConfigureRevisionsForConflictsOperation
• [Projections] Added support for nullable DateTime in projection
• [Projections] Fixed JsConverter strip 'Value' or 'Key' from dictionary entity
• [Projections] Fixed unhandled case of projection with SelectFields
• [Session] Fixed entities loading during OnBeforeStoreEvent
• [Session] Propertly converting dictionary stored in metadata
• [Session] Added active async tasks tracking and throwing on session dispose if there are any

Studio

• [Stats] Added IO metrics view for the system storage

Server

• [Backup] Making sure S3 client won't be downloading entire stream
• [Backup] Allowing a user to choose the compression level for a Snaphost backup
• [Backup] Restore from backup was not respecting "Disable ongoing tasks after restore"
• [Backup] Support restoring from a legacy backup
• [Cluster] Stability improvements
• [Cluster] Fixed race condition between methods that rely on LastDatabaseRecordIndex
• [Cluster] Fixed case when removing and re-adding a node to the cluster
• [CLI] Added threadsInfo to the command options
• [Certificates] Support for ACME V2
• [Certificates] Fixed LastAuthorizedNonClusterAdminRequestTime calculation
• [Debug] Improved Debug Package
• [ETL] Task status reporting fixes. Improved logging.
• [Indexing] Support for side-by-side indexing of map-reduce indexes with OutputReduceToCollection
• [Indexing] Better memory management for map-reduce indexes with OutputReduceToCollection
• [Linux] Fixed CPU usage calculation
• [Linux] Fixed high CPU usage of the Low memory notification thread
• [Logging]When out of disk space, don't attempt to log.
• [Patching] Preserving the order of properties after a patch
• [Querying] Fixed query etag calculation when counters are included or cmpxng was used
• [Querying] Added support of oreding by spatial.distance() for auto indexes
• [Querying] Fixed querying with the usage of in operator and querying list is bigger than 1024
• [Querying] Support not exists() for dynamic queries
• [Querying] Improved field options detection of dynamic queries
• [Querying] Fixed projection uses wrong alias for result of function
• [Querying] Fixed facet intersection algorithm calculation
• [Revisions] Fixed Enforce revision configuration option when there were tombstones
• [Replication] Fixed handling of replication attempting to talk to an idle database
• [Replication] Enhanced handling of Enforcing configuration
• [Subscriptions] Enhanced logging
• [Subscriptions] Fixed subscription race condition between awaiting for a free connection to waiting to different node
• [Subscriptions] Fixed race between subscription connection disposal and returning an answer to the client
• [SNMP] Improved memory allocations
• [SNMP] Added /monitoring/snmp/bulk endpoint
• [Voron] Use UTF8 for Linux and Unicode for windows on PAL

Studio

• [Backup] Fixed visibility of backup configuration with encryption
• [Notifications] Enhancements for huge documents notifications
• [Patching] Fixed error when doing a test patch
• [Restore] Fixed restore operation didn't not set proper Processed value
• Added option to filter import and export of artificial documents

Client

• [JSON] Added support for more basic types as metadata value
• [JSON] Simplify JSON when serializing a command
• [JSON] TrySimplifyJson assign the right type to derived properties
• [Projections] Fixed NRE in NullableSupport
• [Querying] Support negated Any statement in Linq
• Improved validation of provided node URLs
• Can use operations with selected node tag even if DisableTopologyUpdates is true

Server

• [Backup] fixed issue with detecting if backup is encrypted
• [Backup] fixed issue with creating an encrypted backup regardless of explictly stating in Studio that the backup should not be encrypted
• [Backup] improved handling of huge backup files during Google Cloud restore
• [Configuration] added 'Indexing.IndexMissingFieldsAsNull'
• [Cluster] upgrading a Watcher node from 4.1 to 4.2 should not throw NotSupportedException
• [Expiration & Refresh] reduced memory footprint during Expiration cleanup or Refreshing documents
• [Indexing] added the ability to index missing fields as null
• [Indexing] properly handling out of memory exeptions that were raised during index writer creation
• [Linux] fixed Thread CPU usage calculation
• [Logging] reduced number of log entries when we are in low memory
• [Memory] reduced memory footprint for streaming and backup operations on 32-bit systems or in encrypted databases
• [Querying] negative paging parameters (Start, PageSize, Offset, Limit) will throw
• [RQL] fixed string literal parsing when it ends with backslash
• [SQL Import] fixed Schema discovery when importing from MySQL

Client API

• [Events] added 'OnFailedRequest' to 'DocumentStore', marked old 'FailedRequest' from 'RequestExecutor' as obsolete
• [JSON] avoid calling 'DeserializeEntityFromBlittable' when query return type is 'BlittableJsonReaderObject'

Studio

• [Backup] fixed NRE during folder discovery for Amazon S3 restore
• [Backup] displaying full path for local backups instead of relative one
• [Backup] fixed restore source detection when restoring from Amazon S3, Microsoft Azure and Google Cloud
• [Backup] properly detecting restore points from Google Cloud
• [Backup] properly detecting database names in restore points when we have nested folders
• [Backup] properly detecting number of files to restore when we have nested folders
• [Documents] no longer displaying 'RevisionCreated' in the Documents view
• [Databases] added support for arrow handling in 'Databases Dropdown'
• [Refresh] exposed refresh date in 'Documents' view
• [Revisions] added Enforce Configuration button
• [Themes] fixed styling