ChangeLog - DataStax C# Driver

3.11.0

2019-07-22

Features

• [CSHARP-756] - ControlConnection init: Defer host map creation until system tables have been queried
• [CSHARP-757] - Include host_id in host metadata
• [CSHARP-779] - Separate socket endpoint from the host address using an endpoint resolver

Bug Fixes

• [CSHARP-778] - NullReferenceException at Cassandra.Data.Linq.CqlExpressionVisitor.GetPropertyValue(MemberExpression node)
• [CSHARP-781] - Linq2Cql GetTable() generates invalid create table when more than one option is specified
• [CSHARP-784] - Driver is unable to correctly reestablish connection with previously decommissioned node

3.10.1

2019-06-17

Bug Fixes

• [CSHARP-772] - Remove internal conversion of timestmap to DateTimeOffset
• [CSHARP-777] - Invalid or unsupported protocol version (0)

3.10.0

2019-05-21

Features

• [CSHARP-275] - Prevent duplicate metadata fetches from control connection and allow disabling schema metadata fetching
• [CSHARP-763] - Introduce Execution Profiles in Mapper and LINQ APIs
• [CSHARP-678] - Introduce Execution Profiles at Session Level
• [CSHARP-424] - Allow UDT mappings to be defined for different keyspaces

Bug Fixes

• [CSHARP-744] - LINQ and Mapper don’t support empty column names
• [CSHARP-766] - Cassandra Date is not mapped correct to LocalDate with some specfic values

3.9.0

2019-04-02

Features

• [CSHARP-538] - Expose Metadata.CheckSchemaAgreement() and ExecutionInfo.IsSchemaInAgreement()
• [CSHARP-618] - Add client configuration information to STARTUP message
• [CSHARP-725] - Deprecate usedHostsPerRemoteDc in DCAwareRoundRobinPolicy

Bug Fixes

• [CSHARP-708] - Retry on current host should be made on a different connection
• [CSHARP-715] - LocalTime Parse fails for valid LocalTime strings on certain cultures
• [CSHARP-752] - Memory leak in ControlConnection

3.8.0

2019-02-11

Features

• [CSHARP-726] - Improvements to token map building process

3.7.0

2018-11-26

Features

• [CSHARP-705] - Provide a means of sending query to a specific node to facilitate virtual table queries
• [CSHARP-706] - Parse Virtual Keyspace Metadata

Bug Fixes

• [CSHARP-709] - Rarely occurring concurrency bug in the HashedWheelTimer class

3.6.0

2018-06-18

Features

• [CSHARP-591] - EC2 multi-region address resolution policy
• [CSHARP-625] - Mark DowngradingConsistencyRetryPolicy as deprecated
• [CSHARP-634] - Use system.peers in protocol negotiation
• [CSHARP-669] - Support pool warmup on initialization and enable it by default
• [CSHARP-680] - Use OPTIONS message for heartbeats instead of ‘select key from system.local’
• [CSHARP-335] - RowSet: Support concurrent asynchronous calls to fetch next page
• [CSHARP-681] - Log driver version on Connect

Bug Fixes

• [CSHARP-631] - BatchStatement: Use routing key from first statement
• [CSHARP-660] - Linq: StatementFactory shouldn’t cache failed prepared statements
• [CSHARP-667] - Mapper: Statement factory cache should use keyspace to uniquely identify the query
• [CSHARP-691] - Sync completion of socket.ConnectAsync() is not considered

3.5.0

2018-04-17

Features

• [CSHARP-636] - Add NO_COMPACT startup option
• [CSHARP-649] - Limit the write queue size at connection level

3.4.1

2018-02-26

Bug Fixes

• [CSHARP-498] - Linq: short and sbyte parameters fail for constant on Where expressions
• [CSHARP-611] - QueryOptions.GetSerialConsistencyLevel() is not being used
• [CSHARP-635] - Linq: Table creation containing a static counter column not supported
• [CSHARP-640] - Exception using nullable long in a UDT
• [CSHARP-641] - ReadFailureException does not log number of failures
• [CSHARP-643] - Responses with warnings and/or custom payloads are incorrectly parsed for non-results
• [CSHARP-650] - Building of Cluster fails when single contact point DNS entry cannot be resolved

3.4.0

2017-11-13

Features

• [CSHARP-604] - UdtMappingDefinitions.Define needs async counterpart
• [CSHARP-317] - Linq: Support IN with tuple notation for composite clustering keys
• [CSHARP-326] - Mapper: Enum support in collections.
• [CSHARP-370] - Add Cluster.ConnectAsync() and Cluster.ShutdownAsync to the API
• [CSHARP-381] - Support conversion for UDT fields mapping
• [CSHARP-478] - Provide simple way to override a single setting in PoolingOptions
• [CSHARP-506] - Allow prepared statements to be prepared on all nodes
• [CSHARP-524] - UPDATE … IF EXISTS support for linq
• [CSHARP-528] - Provide more information in the NoHostAvailableException message
• [CSHARP-556] - Add max and min uuid methods to TimeUuid structure
• [CSHARP-590] - Modify the message for batch log write failures
• [CSHARP-592] - Expose TimeUuid.Parse() method
• [CSHARP-598] - Use ExceptionDispatchInfo for preserving original stack trace
• [CSHARP-606] - Expose information on the state of connection pools

Bug Fixes

• [CSHARP-364] - FrameWriter.WriteShort() should encode ushorts
• [CSHARP-512] - Linq: Boolean expressions without equality operators are not generated correctly
• [CSHARP-515] - Linq: Chained methods after CqlInsert.IfNotExists() are not considered
• [CSHARP-522] - Linq: using CqlOperator.SubstractAssign to remove an item from a map fails
• [CSHARP-547] - PreparedStatement instances created from empty constructor can not bind values
• [CSHARP-558] - Mapper: Table creation error when PartitionKey or ClusteringKey have no Name attribute
• [CSHARP-574] - UnobservedTaskException in Connection class
• [CSHARP-578] - Linq: CqlQuery.QueryTrace always null
• [CSHARP-614] - BatchRequests dont include generated timestamps

3.3.2

2017-07-13

Features

• [CSHARP-581] - Linq Batch: allow setting the batch type
• [CSHARP-582] - Linq: Add Allow filtering on scalar Count() method
• [CSHARP-587] - Support LocalDate and LocalTime parsing

Bug Fixes

• [CSHARP-577] - InvalidCastException in Cassandra.Data.Linq
• [CSHARP-586] - WithDefaultTimestamp flag is not on when using timestamp generator

3.3.1

2017-06-19

Bug Fixes

• [CSHARP-579] - SynchronizationContext-based deadlock on Connect()

3.3.0

2017-05-22

Notable Changes

• Timestamp generation: client-side timestamps are generated and sent in the request by default when the server supports it.
• Enhanced retry policies: handle client timeouts, connection closed and other errors.

Features

• [CSHARP-205] - Add client-side timestamp generator
• [CSHARP-449] - Expose OnRequestError() method in a new extended retry policy interface
• [CSHARP-529] - Make protocol negotiation more resilient
• [CSHARP-543] - Linq: Evaluation of closures can be done more efficiently
• [CSHARP-496] - Linq: Support Cassandra 3.10 GROUP BY

Bug Fixes

• [CSHARP-540] - Table metadata can not read custom types column info
• [CSHARP-555] - Cluster.Init: C# driver appears to be leaking on TimeoutException
• [CSHARP-559] - Mapper.ExecuteAsync doesn’t allow ConsistencyLevel setting on the BatchStatement
• [CSHARP-563] - TokenAwarePolicy does not take statement keyspace into account

3.2.1

2017-02-15

Bug Fixes

• [CSHARP-503] - TimeUuid values are deserialized as Guid causing problems
• [CSHARP-530] - Row.GetValue() does not support Nullable
• [CSHARP-531] - Mapper: Avoid using ConcurrentDictionary.Count for Statement cache

3.2.0

2016-12-20

Features

• [CSHARP-274] - Don’t mark host down while one connection is active
• [CSHARP-171] - Alternate ILoggerProvider-based logging API

Bug Fixes

• [CSHARP-504] - Table metadata fetching for case-sensitive UDT name fails
• [CSHARP-507] - Mapping attributes: ClusteringKeyAttribute.Name is not used
• [CSHARP-511] - Timeuuid collections are not converted from Guid[]
• [CSHARP-513] - Use constant number for AssemblyVersion attribute

3.1.0

2016-10-17

Merged from 3.0 branch:

Bug Fixes

• [CSHARP-483] - Request timeout but driver log and net-trace shows the server responds promptly
• [CSHARP-492] - Mapper: Include keyspace name when defined in mappings
• [CSHARP-493] - Connection: Reading while cancelling all in-flight requests can result in NullReferenceException
• [CSHARP-500] - Concurrent calls to OperationState.SetCompleted() can result in deadlock

3.0.9

2016-09-29

Bug Fixes

• [CSHARP-483] - Request timeout but driver log and net-trace shows the server responds promptly
• [CSHARP-492] - Mapper: Include keyspace name when defined in mappings
• [CSHARP-493] - Connection: Reading while cancelling all in-flight requests can result in NullReferenceException
• [CSHARP-500] - Concurrent calls to OperationState.SetCompleted() can result in deadlock

3.1.0-beta1

2016-08-17

Notable Changes

• Added .NET Core support and dropped support for .NET Framework 4.0 #240

Features

• [CSHARP-384] - .NET Core Support
• [CSHARP-426] - Drop support for .NET Framework 4.0

3.0.8

2016-08-04

Bug Fixes

• [CSHARP-467] - Linq query generation only supports single increments and decrements
• [CSHARP-475] - cluster.Metadata.GetTable(KS,TB).TableColumns KeyType returns None instead of Partition.
• [CSHARP-476] - KeyNotFoundException from Cassandra Error Response

3.0.7

2016-06-27

Features

• [CSHARP-444] - Expose AddressTranslator instance in Configuration
• [CSHARP-461] - Include Idempotence-aware retry policy

Bug Fixes

• [CSHARP-331] - TokenMap#ComputeTokenToReplicaNetwork does not account for multiple racks in a DC
• [CSHARP-372] - ProtocolErrorException are incorrectly reported
• [CSHARP-465] - OperationTimedOut exceptions are not included in NoHostAvailableException

3.0.6

2016-05-12

Bug Fixes

• [CSHARP-447] - TimeUuid instances: Cannot order by underlying date
• [CSHARP-448] - Support big-endian systems in TimeUuid struct
• [CSHARP-451] - Mapper: Invalid CQL if first pocoValue is null and a later value is not
• [CSHARP-453] - Decimal serializer: support negative scale

3.0.5

2016-04-20

Features

• [CSHARP-409] - Mapper: Support timestamp at CqlQueryOptions level
• [CSHARP-415] - Allow setting read timeout at statement level

Bug Fixes

• [CSHARP-414] - Linq projections not handled correctly for select query.
• [CSHARP-417] - Query trace: introduce delay between retries and max retries
• [CSHARP-428] - Use QueryAbortTimeout for metadata sync queries
• [CSHARP-439] - Race condition on read timeout
• [CSHARP-445] - PrepareAsync() blocks the calling thread when fetching table metadata

3.0.4

2016-03-28

Features

• [CSHARP-393] - Pass the authenticator name from the server to the auth provider #196
• [CSHARP-395] - Mapper: Support TTL for Inserts #192
• [CSHARP-402] - Support custom type serializers #194
• [CSHARP-406] - Support Dictionary as named parameters in SimpleStatement #199
• [CSHARP-410] - Mapper: Allow setting the BatchType for CreateBatch() #195

3.0.3

2016-03-03

Bug Fixes

• [CSHARP-408] - Serial not allowed as Statement consistency level

3.0.2

2016-02-11

Bug Fixes

• [CSHARP-403] - LZ4 decompression buffer pooling bug

3.0.1

2016-01-14

Features

• [CSHARP-388] - Expose Builder.WithMaxProtocolVersion()

Bug Fixes

• [CSHARP-385] - TokenMap evaluates all the ring when a replication factor contains a non-existent DC
• [CSHARP-386] - Following reconnection attempts may be not be scheduled depending on timer precision
• [CSHARP-391] - RequestExecution retry counter should be volatile

3.0.0

2015-12-21

Notable Changes

• Default consistency changed back to LOCAL_ONE.

Features

• [CSHARP-299] - Mapper and Linq: handle NULLs efficiently at the client level
• [CSHARP-378] - Change default consistency level to LOCAL_ONE
• [CSHARP-374] - Use a private field for inFlight counting
• [CSHARP-375] - Enable heartbeat by default
• [CSHARP-377] - Reduce allocations inside RowSet class for void results

Bug Fixes

• [CSHARP-313] - DCAwareRoundRobinPolicy incorrect detection of local datacenter, connects to wrong datacenter
• [CSHARP-336] - Connection with SSL settings to a C* host without ssl enabled causes the driver to hang
• [CSHARP-351] - Linq CreateTable(): support frozen keyword
• [CSHARP-366] - ControlConnection: reconnection attempt after Cluster.Shutdown() may cause ObjectDisposedException
• [CSHARP-376] - HashedWheelTimer should remove cancelled timeouts on each tick to allow GC

3.0.0-beta2

2015-11-19

Notable Changes

• Support for Cassandra 3.0
• Breaking: Changed default consistency level to LOCAL_QUORUM #158
• Breaking: AggregateMetadata.InitialCondition member now returns the string representation of the value #157
• Changed read timeout to 12 secs #158
• Linq: Select expressions or lambdas that do not specify fields generate a query with explicit columns names. ie: SELECT a, b, c, ... #94

Features

• [CSHARP-361] - Update schema type representation to CQL
• [CSHARP-353] - Change default consistency level to LOCAL_QUORUM
• [CSHARP-259] - Enable TCP NoDelay by Default
• [CSHARP-356] - Updated default behavior unbound values in prepared statements
• [CSHARP-362] - Set default read timeout to 12 secs

Bug Fixes

• [CSHARP-308] - Linq: Avoid using SELECT * when the fields are not specified
• [CSHARP-365] - Mono: SocketAsyncEventArgs BufferList must implement indexer
• [CSHARP-371] - Mapper: Allow automatic conversion to structs for null values

3.0.0-beta1

2015-10-19

Notable Changes

• Support for Cassandra 3.0-rc2

Features

• [CSHARP-213] - Retrieve Cassandra Version with the Host Metadata
• [CSHARP-286] - Process Modernized Schema Tables for 3.0
• [CSHARP-348] - Process materialized view metadata
• [CSHARP-359] - Updated Clustering Order Representation in Schema Metadata

2.8.0-alpha1

2015-10-29

Features

• [CSHARP-270] - Use a pool of buffers
• [CSHARP-244] - Add driver-side write batching of native frames

2.7.3

2015-11-13

Notable Changes

• Mapper and Linq: Fixed regression introduced in v2.7.2 that failed to map columns with null values to structs.

Bug Fixes

• [CSHARP-371] - Mapper: Allow default(T) for null values

2.7.2

2015-10-06

Features

• [CSHARP-337] - Make PreparedStatement mockable

Bug Fixes

• [CSHARP-342] - Custom type converters do not work
• [CSHARP-345] - Regression: Support server error in STARTUP response for C* 2.1
• [CSHARP-346] - Mapper: Support anonymous type containing a nullable column for value types
• [CSHARP-347] - Improve exception message for null values on collections

2.7.1

2015-09-17

Bug Fixes

• [CSHARP-344] - Calling Socket.ConnectAsync() can result in uncaught exception

2.7.0

2015-09-10

Notable Changes

• Cluster: All requests use a client read timeout that can be configured using SocketOptions.SetReadTimeoutMillis(int), disabled by default
• Cluster: Added support for speculative query executions

Features

• [CSHARP-273] - New Retry Policy Decision - try next host
• [CSHARP-311] - Cluster-level reusable timer: Hashed Wheel Timer
• [CSHARP-314] - Use Immutable collections for Hosts and the Connection pool
• [CSHARP-243] - Speculative query retries
• [CSHARP-279] - Make connection and pool creation non blocking
• [CSHARP-280] - Schedule reconnections using Timers
• [CSHARP-328] - Linq support for StartsWith()
• [CSHARP-332] - Per-Host Request Timeout

Bug Fixes

• [CSHARP-260] - Default QueryAbortTimeout value should not be Infinite
• [CSHARP-296] - Driver hangs when system.peers is mucked up.
• [CSHARP-316] - RequestHandler retry should not use a new query plan
• [CSHARP-325] - Enum column mapping to int is not supported in Linq Update()
• [CSHARP-333] - Allow Heartbeat interval be set to zero to disable it
• [CSHARP-338] - TcpSocket.ReceiveAsync() raises ObjectDisposedException that faults the user Task
• [CSHARP-339] - Host reconnection delay Read operation and isUp Write operation are not thread-safe
• [CSHARP-340] - Switching keyspace at level after disposing connection results in ObjectDisposedException

2.6.0

2015-08-10

Notable Changes

• Added support for Cassandra 2.2 types and features

Features

• [CSHARP-282] - Support UDF and Aggregate Function Schema Meta
• [CSHARP-283] - Add client address to query trace
• [CSHARP-285] - Support protocol v4 exceptions
• [CSHARP-287] - Use PK columns from v4 prepared responses
• [CSHARP-290] - Key-value payloads in native protocol v4
• [CSHARP-291] - Small int and byte types for C* 2.2
• [CSHARP-293] - Support new date and time types
• [CSHARP-303] - Add support for client warnings
• [CSHARP-304] - Distinguish between NULL and UNSET values in Prepared Statements
• [CSHARP-305] - Support server error in STARTUP response for C* 2.1

2.5.2

2015-04-08

Bug Fixes

• [CSHARP-255] - Use active connection to wait for schema agreement
• [CSHARP-268] - Linq Select() projections for Update() do not support fields
• [CSHARP-269] - Mapper always sets automatic paging to false

2.5.1

2015-03-23

Features

• [CSHARP-146] - Manual paging
• [CSHARP-211] - Make Statement.SetRoutingKey() api more friendly
• [CSHARP-240] - Log additional information on RequestHandler and Connection classes
• [CSHARP-242] - Make pool creation, after node considered back up, less eager
• [CSHARP-245] - Use specific TaskScheduler for calling callbacks from the Connection
• [CSHARP-251] - Support Lightweight Transactions in the Mapper API
• [CSHARP-258] - Add TCP NoDelay socket option
• [CSHARP-261] - Linq: Manual paging
• [CSHARP-262] - Mapper: Manual paging

Bug Fixes

• [CSHARP-246] - ObjectDisposedException in Connection.WriteCompletedHandler()
• [CSHARP-252] - Metadata.HostEvent is not firing when a node is Down, it does fire when a node is Up
• [CSHARP-253] - RPTokenFactory produces negative hashes
• [CSHARP-254] - TokenMap doesn’t handle adjacent ranges owned by the same host
• [CSHARP-264] - Builder.WithPort() option not considered
• [CSHARP-266] - Connection: Serialization of bad frames can result in NullReferenceException

2.5.0

2015-02-05

Features

• [CSHARP-234] - Support Freezing and Nested Collections
• [CSHARP-174] - Deprecate SimpleStatement.Bind and add constructor params
• [CSHARP-176] - Mark Session.WaitForSchemaAgreement() as Obsolete
• [CSHARP-235] - Mapper & Linq: Issue a log warning when the number of prepared statements is large
• [CSHARP-239] - Make RowSet.GetEnumerator() and Row.GetValue() methods mockable

Bug Fixes

• [CSHARP-227] - ReplicationStrategies now internal?
• [CSHARP-237] - Linq Table.Create() does not use provided keyspace when using constructor that specifies it
• [CSHARP-241] - TaskHelper.Continue() calls to SynchronizationContext.Post can cause deadlocks
• [CSHARP-247] - Support for COM single threaded apartment model
• [CSHARP-248] - QueryOptions PageSize setting not being respected

2.5.0-rc1

2015-01-15

Notable Changes

• Integrated CqlPoco into the driver codebase

Features

• [CSHARP-199] - Integrate CqlPoco
• [CSHARP-165] - Add an address translator
• [CSHARP-173] - Linq Counter column support
• [CSHARP-81] - Cannot add item to collection column using linq
• [CSHARP-89] - Ignore attribute for object properties would be really useful
• [CSHARP-92] - Makes it possible to provide Table and Keyspace creation options to Linq
• [CSHARP-123] - Linq: Make identifier quoting optional
• [CSHARP-128] - Linq CreateTablesIfNotExist: varint support
• [CSHARP-143] - Strong Name the NuGet Assemblies
• [CSHARP-144] - Linq: CQL functions support
• [CSHARP-153] - Performance optimization for adapt Rows to entities
• [CSHARP-214] - Use InvalidTypeException with a clear message when conversion is not valid
• [CSHARP-215] - Make mapping Fetch() lazy
• [CSHARP-233] - Support SortedSet and HashSet as valid sets and arrays as valid List or Set values

Bug Fixes

• [CSHARP-170] - When Changing Key Space after a Prepare, the driver goes into a recursive exception pattern causing the application to be blocked
• [CSHARP-229] - Internal class Cassandra.TcpSocket leaks memory that can cause long running multiple/many C* sessions with large records to run OOM
• [CSHARP-231] - Batch ExecutionInfo always returns consistency Any as achieved consistency