Added the feature of cluster snapshots for persistence caches
Added tracing of transactions, discovery, exchange, and communication components
Added new cluster-wide state: read-only. In this state caches available for cache read operations. Cache operations with data modification (update, remove, clear, create, destroy and etc.) don't allowed
Added TDE master key rotation feature
Added functionality to run user-defined code inside a sandbox
Added Cluster ID and tag properties to identify the cluster
Added support for one-way thick-client to server connections
Added the ability to not open server sockets (for incoming connections) by thick client
Added management API to cancel user-provided tasks and queries
Added partition states system view and free-lists system view
Added txKeyCollisions cache metric
Added OffHeapEntriesCount, OffHeapBackupEntriesCount, OffHeapPrimaryEntriesCount, HeapEntriesCount, CacheSize to cache metrics
Added query pool starvation monitoring
Added the ability to put non-primitive data types via HTTP-REST
Added the ability to use CACHE_CREATE and CACHE_DESTROY permissions on per-cache level
Added the ability to restrict access to the internal package of Ignite
Added nodes caching in cluster groups
Added warning of deadlock when an unordered collection is passed to putAll-style bulk cache operation
Added the ability to set user attributes for thin clients connections
Added a new public API for the cluster state change (activation/deactivation and etc.)
Added the ability to hide sensitive data in logs, exceptions, and utilities output (IGNITE_TO_STRING_INCLUDE_SENSITIVE system property)
Added the ability to change long-running operation timeout in run-time
Added dedicated thread pool for creating and rebuilding indexes
Added possibility to pass client SSL certificate to security plugin (for clients: JDBC thin, thin-client, grid-client, REST)
Added Apache Ignite Slim binary distribution with essential modules only
Added the ability to set fetch size for JDBC cache store
Added "features" to thin client protocol
Added support for node discovery using AWS ALB
Updated Bouncy Castle dependency for AWS module to 1.60 version
Fixed security context propagation for remote filters and listeners (for ContinuousQueries, IgniteMessaging, IgniteEvents)
Fixed ConcurrentModificationException when DEBUG logging continuous queries
Fixed critical errors handling by thin-client server-side threads
Fixed memory leaks in continuous query handlers
Fixed data streamer pool MXBean (from ThreadPoolMXBean to StripedExecutorMXBean)
Fixed memory leaks in MVCC processor
Fixed deadlock on concurrent removeAll() on the same cache
Fixed sensitive user data leak in a diagnostic exchange log message
Fixed checkpoint block for all duration of index deletion
Fixed WAL flush issue in LOG-ONLY/FSYNC modes and null flush pointer
Fixed limiter for a dump of long-running transactions
Fixed thread group for Ignite threads (do not use dedicated thread group anymore)
Fixed exception during creating string representation of the binary object
Fixed potential partition map exchange hanging on Zookeeper discovery clusters
Fixed NPE in checkpoint thread
Fixed fail of optimistic serializable transactions when read-through is enabled
Fixed node startup after upgrade in case of using Local cache with persistence enabled
Fixed awaiting for service deployment in the event-driven service processor
Fixed incorrect collecting cache configuration on the coordinator
Fixed node failure when DistributedProcess unable to send a single message to the coordinator
Fixed binary metadata folder, now it's moved to PDS storage folder
Fixed EVT_CACHE_STOPPED event local listener issue
Fixed processing of failure detection timeout in TcpDiscoverySpi. If a node fails to send a message or ping, now it drops the current connection strictly within this timeout and begins establishing a new connection much faster
Fixed WAL FSYNC mode problem with a disabled archiver
Fixed the ability to set number of WAL segments to less than 2
Fixed race condition in the state processor.
Fixed deadlock between topology update and CQ registration
Fixed potential NullPointerException on cache operations after client reconnect
Fixed class loading exception when package name starts from 'class'
Fixed ClassCastException in cache group metrics on client nodes
Fixed registration of capturingClass in marshaller making lambdas fragile on code update.
Fixed NPE, when IgniteLock removed before it's used
Fixed processing of connection recovery timeout in TcpDiscoverySpi. If a node loses connection, now it strictly obtains a new connection to the ring of gets segmented within this timeout.
Fixed p2p deployment of scan queries transformer class
Fixed exception on initialization in push metrics exporters
Fixed AssertionError on getting cache size from the MBean on the inactive cluster
Fixed JVM option in .sh/.bat scripts to support CPU load metric on java 11 and higher
Fixed broken redis mget command
Improved transaction recovery mechanism on topology change
Improved checkpoint logic to write checkpoint buffer pages first to avoid throttling
Improved node recovery time by executing partition state restore phase in parallel
Improved node start-up and periodic metrics logging.
Improved node host resolving (don't try to resolve hostnames when localHost is set as IP)
Improved data loss handling
A lot of stability and performance fixes
Replaced ignite.sh invocation with the direct JVM call for Docker deployment
Discontinued IGFS and Hadoop Accelerator components
SQL:
Added the ability to create tables for existing caches
Added metrics: sql.parser.cache.hits - count of hits for queries cache, sql.parser.cache.misses - count of misses for queries cache
Added metrics to count the number of successful and failed SQL queries
Added validation of the uniqueness of a field's name annotated with @QuerySqlEntity. Previously cache could be started without errors, but the key's field would not be queryable
Added an option to validate field types against SQL schema on key-value insert
Added separate SQL configuration
Fixed SQL schema name validation (prohibit empty schema names)
Fixed duplicate definition of a column by "create table"
Fixed SQL wildcard to java regex translation
Fixed custom GROUP_CONCAT separator support
Fixed data race when getting index rebuild status
Fixed incorrect "not null" constraint check on key field
Fixed an issue when a node stops if an index is created on a field with invalid data type
Added the ability to use platform cache to execute local ScanQuery with partition
Added the ability to call .NET services from Java
Added the ability to get metadata for FieldsQueryCursor
Added partition-based AffinityCall and AffinityRun overloads, fixed existing AffinityCall and AffinityRun to reserve partition
Added the ability to use SqlFieldsQuery as ContinuousQuery.InitialQuery
Fixed query cursor thread safety
Fixed issue with starting Ignite under Mono on Linux
Fixed searching of service method with user type array parameter
Fixed OutOfMemory exception when calling grid service from .NET with user type array parameter
Fixed TransactionScope behavior with read-only cache operations
Fixed stale local node info after client reconnect
Ignite C++:
Added CMake build support
Fixed compilation error for boost versions greater than 1.70
Removed autotools build support
JDBC:
Added connections failover support
Added support for 'connectionTimeout' and 'queryTimout' properties
Added SSL CipherSuites support
Added support for individual reconnect in case of best effort affinity mode
Added the ability to control affinity cache size
Added support of custom user's java object
Fixed an issue where a metadata request through a JDBC Connection could fail if metadata is requested for cache without explicit query entity configured
Java thin-client:
Added cluster API support
Added cluster group API support
Added compute support
Added Ignite services support
Fixed size overhead after unmarshalling Collections/Arrays of objects
Fixed binary type schema registration for nested objects when CompactFooter is enabled
Fixed transactions withLabel issue
Fixed binary type issue when more than one schema for one type is used
.Net thin client:
Added cluster API support
Added cluster group API support
Added compute support
Added automatic server node discovery
Python thin-client:
Added the ability to specify keyfile password
Fixed wrong fields order in queries when fields count > 10
Control utility:
Added commands to manage cluster binary metadata to control.sh command-line utility
Added commands to view and change Cluster Id and Tag
Added "--force" flag for "deactivate" and "set-state" commands
Added "--check-crc" flag for "validate_indexes" command
Added "--verbose " option to print stack trace errors
Added "--check-sizes" option for "validate_indexes" to check whether index and cache size are equal
Added "--cache check_index_inline_sizes" command to check that indexes inline size the same on all cluster nodes
Fixed double password requests for keystore and truststore
Fixed corrupted indexes detection
Fixed GridClient instances leakage after various errors
Fixed return code swallowing by control.sh bash script
Spring Data integration:
Added multiple Ignite instances on same JVM support (@RepositoryConfig)
Added query tuning parameters in @Query annotation support
Added projections support
Added Page and Stream responses support
Added SQL Fields Query resultset transformation into the domain entity support
Added named parameters (:myParam) in SQL queries support (declared using @Param("myParam"))
Added advanced parameter binding and SpEL expressions in SQL queries support
Added SpEL expressions in Text queries (TextQuery) support
Fixed incorrect processing of non-comparable keys in spring-data for repository methods: findAllById(ids) and deleteAllById(ids).
Fixed cursors leakage in RunningQueryManager when executing queries via spring-data repositories.
