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

Server

• [Backup] Using dedicated threads for backup operations
• [Backup] Allowing to restore a backup from cloud storage
• [Backup] Server wide backup wont' wake up idle databases
• [Backup] Fixed error handling when we fail to delete files on S3 when running retention policy
• [Blittable] Fixed handling of escape characters
• [Blittable] Fixed disposal of arrays nested in JSON
• [Cluster] Fixed deletion of a node that is a part of an encrypted database group
• [Cluster] Unloading idle databases when running in cluster
• [Cluster] Don't choose node as responsible once if it is about to be deleted from database group
• [Cluster] Fixed error in ClusterMaintenanceSupervisor caused by getting multiple reports in network buffer
• [Docker] Improved memory consumption monitoring
• [Encryption] Fixed support for huge transactions (>int.MaxValue) in encrypted databases
• [Indexing] Moving JavaScript index compilation cache from static level to database level
• [Indexing] Fixed index creation referencing metadata for collection names with dashes
• [Indexing] Fixed error handling of OOM exception when logging another error
• [Indexing] Fixed cleanup of tombstones which wasn't processed by multi map or map-reduce index
• [Indexing] Fixed index progress for an index with LoadDocument
• [Licensing] Removed SNMP warning after license activation
• [Memory] Improved memory calculations when running in Docker
• [Patching] Fixed debug actions logging for put, load and delete
• [Querying] Fixed the order of extraction of JS projected fields - from index first then from a document
• [Querying] Fixed fixed JS projection behavior when we have dynamic fields in index (always check index fields in that case)
• [Querying] Fixed NULL_VALUE and EMPTY_STRING behavior for JS projections to match the non-JS ones
• [Querying] Fixed JS projections of stored string field with value that 'looks' like a large number
• [Replication] Fixed issue where specific document with attachment insertion pattern cause replication of many items in a single batch
• [Revisions] Allowing to enforce revision configuration
• [SNMP] Using unique engine ID when SNMPv3 AuthPriv is used
• [SNMP] Fixed Allocated Memory on Linux
• [SNMP] Fixed Public TCP Url OID
• [SNMP] Exposed LastAuthorizedNonClusterAdminRequestTime
• [Subscriptions] Fixed tight looping when having subscription configured for revisions but there is no revision in database
• [Smuggler] Prevent Access Violation when importing legacy counters
• [Smuggler] Fixing memory leaks during import
• [Voron] Fixed compatibility of 64 bits database that are used from 32 bits systems

• [Voron] Added functionality that will skip transaction during journal reading which has integrity issues but was already synced

• Updated .NET Core to version 2.2.7

Client

• [RequestExecutor] Creating new HttpClient if SocketException was encountered
• [RequestExecutor] Fixing possible race condition when we update topology during command failover
• [Querying] Fixed missing Id to id() translation in Where with exact overload
• [Loading] Fixed Load with Include for dictionaries
• [JSON] Avoid simplifying the property if it's a JObject, JArray and JValue

Studio

• Basic support for formatting of JavaScript indexes
• Exposing Refresh feature

Server

• [Backup] backups will be delayed when in low-memory state to avoid putting even more pressure on the server
• [Backup] backups will be executed on a non-primary node in database group to avoid putting pressure in the node that handles traffic
• [Configuration] added Backup.LowMemoryBackupDelayInMin and Server.CpuCredits.ExhaustionBackupDelayInMin
• [Configuration] added Server.CpuCredits.Exec, Server.CpuCredits.Exec.Arguments, Server.CpuCredits.Exec.SyncIntervalInMin and Server.CpuCredits.Exec.TimeoutInSec
• [Configuration] added Monitoring.Snmp.AuthenticationProtocol, Monitoring.Snmp.AuthenticationUser, Monitoring.Snmp.AuthenticationPassword, Monitoring.Snmp.PrivacyProtocol, Monitoring.Snmp.PrivacyPassword and Monitoring.Snmp.SupportedVersions
• [Counters] stabilization and improvements in replication regarding the transaction boundaries
• [Cluster] stability improvements
• [Cluster] promoting and demoting node should be a ClusterAdmin, not Operator operation
• [Debug] added '/admin/cpu-credits' and '/debug/cpu-credits' endpoints
• [Endpoints] added '/admin/stats'
• [Endpoints] SNMP monitoring endpoints now require Operator permissions instead of ClusterAdmin
• [Expiration] fixed possible leaks of tasks when a lot of databases is being unloaded or deleted
• [Expiration] fixed the possibility of a situation where cleaner would be executed more often than the configured value
• [Indexing] fixed the possibility to encounter stale indexes when node was added to a cluster database group
• [Indexing] output of map-reduce indexing functions should not use the same property accessor cache, because it might not contain necessary group by fields needed
• [Indexing] better handling of dictionaries in indexing functions
• [Indexing] added 'id' and 'getMetadata' functions to JavaScript indexes
• [Indexing] properly handling negation on double
• [Licensing] fixed a corner case when "Let's Encrypt" certificate would not auto-renew itself even if license allows that
• [Memory] x86 memory optimizations and AVE fixes
• [Memory] fixed few detected memory leaks and adjusted couple memory usages to reduce the memory footprint
• [Monitoring] added SNMP v3 AuthPriv support
• [Monitoring] added new endpoints that return server storage disk information (OID: 1.3.6.1.4.1.45751.1.1.1.10.1-4) and an indication if server is running under low memory flag (OID: 1.3.6.1.4.1.45751.1.1.1.6.2)
• [Operations] wrapping background task in a separate task to avoid any delays in retuning the operation ID to the client
• [PAL] added EBADF to EFBIG and EINVAL when pwrite instead of fallocate for supporting aufs
• [Querying] fixed issue with returning results when query is done on decimal 0 value
• [Querying] reduced the CPU footprint when performing heavy faceted search
• [RQL] detecting properly artificial projection e.g. 'from Orders as o select o'
• [Subscriptions] will use proper batch size on x86 systems
• [Subscriptions] subscriptions for specific collections should do case insensitive comparison in case when documents have a different casing of collection names
• [Voron] fixed "attempted to delete value but it wasn't in index" bug
• [Voron] fixed "tried to released page X but couldn't find it in the allocation section" bug that could occur on 32-bit systems
• [Voron] reducing the sizes of journals, logs and scratches on x86 systems
• [Voron] fixed corner case where "SearchPageFor" could skip values

Client API

• [Changes API] fixed possible connection leak due to invalid connection hash calculation
• [Indexes] added 'System.Text.RegularExpressions' to a list of well-known server-side assemblies, so parameters from methods like 'Regex.IsMatch' will not be converted to strings
• [Patching] proper handling when session.Advanced.Patch is used on a collection, will not duplicate records in collection after SaveChanges
• [Session] invoking 'Evict' will release additional internal structures to reduce memory footprint
• [Subscriptions] opening a session will skip tracking revisions if this is a subscription that retrieves revisions

Studio

• [Backup] added an ability to set Retention Policy when backup is being configured
• [Backup] added UI for configuring Server-wide Backup
• [Backup] restoring from Cloud will show details about the source of restore
• [Dashboard] added System storage to the storage section
• [StackTraces] various improvements
• Delete by Query should display a progress popup when executed
• styling improvements

Other

• [Test] TestDriver now correctly adjusts automatic database names when 'GetDocumentStore' is executed from constructor and not from method

Server

• [Backup] Added retention policy for backups
• [Backup] Added restore from RavenDB cloud
• [Backup] Fixed allowed backups to Amazon S3
• [Cluster] Stability improvements
• [Cluster] Added option to remove specific change vectors from a database (UpdateUnusedDatabasesOperation)
• [Configuration] Added 'Updates.BackgroundChecks.Disable configuration option
• [Import] Fixed import of .ravendbdump file with existing auto map-reduce index
• [Licensing] Fixes cores reassign when moving from upgrading to higher license
• [Licensing] Fixed loading of null cert
• [Patching] Fixed patching of documents created by cluster transactions
• [PAL] Fixed problem with copying librvnpal binary on server startup
• [Subscriptions] Fixed subscriptions on deleted revisions
• Added Refresh feature that will touch a document according to date in @refresh metadata
• Updated .NET Core to version 2.2.6

Client

• [Connection Strings] Added RaftCommandIndex field to PutConnectionStringResult and RemoveConnectionStringResult. ETag field was marked as obsolete.
• [Conventions] Added CustomizeJsonDeserializer convention
• [Identities] Added dedicated operations for working with identities (NextIdentityForOperation, SeedIdentityForOperation
• [Revisions] Added a way to manually force revision creation session.Advanced.Revisions.ForceRevisionCreationFor

Server

• [Backup] Support for Google Buckets as backup target
• [Backup] Added option to define a backup operation across all databases
• [Certificates] Export certificate will work for Operators
• [Compare Exchange] Added ability to store null as compare exchange value
• [Compare Exchange] Fixed import of compare exchange values when importing from 4.1 .ravendump file
• [Cluster] Stability improvements
• [Counters] Improved import performance and possible memory leaks during the process
• [CSV] Fixed missing Raven-Clr-Type in Export/Import CSV
• [Debugging] Added /cluster/topology to the debug package info
• [Debugging] Capturing stack traces on Linux
• [Encryption] Improved memory usage by background operations in encrypted databases]]
• [ETL] Added ETL.MaxBatchSizeInMb option to limit batch size by amount of sent data (default: 64MB)
• [Indexing] Fixed cleanup on idle index
• [Indexing] Recreating index writer on EarlyOutOfMemoryException
• [Indexing] Added support for Aggregate, Join, GroupJoin, LongCount, ThenBy, ThenByDescending, TakeWhile, SkipWhile in the index definition
• [Indexing] Ignoring ObjectDisposedException on index deletion and not reporting it to the Studio
• [Indexing] Added configuration option Indexing.Encrypted.TransactionSizeLimitInMb (default: 64MB)
• [Indexing] Better handling of methods in additional sources
• [Logging] Added Logs.Compress option to compress log files (default: false)
• [Logging] Added Logs.RetentionSizeInMb option to control logs retention based on size (default: disabled)
• [Patching] Fixed memory leak
• [Patching] Patch will preserve the order of properties
• [Querying] Added support for sorting by Id as a alphanumeric value
• [Replication] Fixed conflict creation of HiLo documents
• [Replication] Fixed NRE when replicating HiLO document tombstone
• [Replication] Added Replication.RetryMaxTimeoutInSec allowing to retry on replication failure (default: 300 sec)
• [Subscriptions] Fixed possible endless loop when testing a subscription
• [Subscriptions] Fixed include usage in subscriptions test
• [Subscriptions] After restore from export file subscriptions will have different internal identifier
• [Suggestions] Fixed index writer recreation after indexing batch
• [Setup Wizard] Fixed port issue when setting up cluster
• [SNMP] Added SNMP alert for CPU credits
• [Voron] Fixed error handling in async transactions
• [Voron] Recognize SMB2 shares as not valid for dir sync
• Fixed possible race condition during server initialization when using HTTPS
• Fixed RavenDB 4.2 incompatibility on Windows 7
• Enhanced performance handling on burstable instances by scaling down background operations
• Fixed potential server update problem if libsodium or librvnpal libraries were updated

Experimental

• [Graph API] Support for alias in edge SELECT clauses

Tools

• [Voron Recovery] Added support for recovering encrypted databases

Client

• [Backup] Added option to pass node to RestoreBackupOperation
• [Backup] Added RemoteFolderName to Glacier backup setting
• [Configuration] Preventing multiple calls to configuration/client endpoint
• [Cluster] Improving client interaction with the cluster
• [Cluster] Added SetDatabaseDynamicDistributionOperation operation
• [Memory] Fixed cached memory usage
• [Projections] Fixed calculations on integers
• [RQL] Marking 'limit' and 'offset' as reserved keywords
• [Querying] Fixed custom converters usage when serializing query parameters
• [Querying] Added overload for Search method allowing to provide a collection of search terms
• [Session] Fixed changes detection of session.Advanced.WhatChanged()
• [Session] Fixed session clearing
• [Smuggler] Better error handling on Smuggler.ExportAsync is provided path isn't valid or accessible
• [Streaming] Added support for StreamQueryStatistics to async streaming API
• Prevented accepting tasks configurations when creating a database or updating database record
• Fixed DatabaseDoesNotExistException on first operation after creating database

Studio

• [Backup] Fixed Backup local destination folder autocomplete
• [Licensing] Added Renew option if license is expired
• [Cluster] Fixed displayed version after server update on Cluster view
• [Cluster] Fixed Cluster view constantly showing Voting in Progress
• [Replication Graph] Displaying replication errors