CHANGES.txt

3.4.0
 * Spark 3.4.x support (SPARKC-702)
 * Fix complex field extractor after join on CassandraDirectJoinStrategy (SPARKC-700)

3.3.0
 * Spark 3.3.x support (SPARKC-693)
 * Materialized View read support fix (SPARKC-653)
 * Fix Direct Join projection collapse (SPARKC-695)
 * Fix mixed case column names in Direct Join (SPARKC-682)

3.2.0
 * Spark 3.2.x support (SPARKC-670)
 * Fix: Cassandra Direct Join doesn't quote keyspace and table names (SPARKC-667)
 * Fix: The connector can't find a codec for BLOB <-> java.nio.HeapByteBuffer (SPARKC-673)

3.1.1
 * Fix: Cassandra Direct Join doesn't quote keyspace and table names (SPARKC-667)
 * Fix: The connector can't find a codec for BLOB <-> java.nio.HeapByteBuffer (SPARKC-673)

3.1.0
 * Updated Spark to 3.1.1 and commons-lang to 3.10 (SPARKC-626, SPARKC-646)
 * UDTValue performance fix (SPARKC-647)
 * update java driver to 4.12.0 (SPARKC-656)

3.0.2
 * Fix: Cassandra Direct Join doesn't quote keyspace and table names (SPARKC-667)
 * Fix: The connector can't find a codec for BLOB <-> java.nio.HeapByteBuffer (SPARKC-673)

3.0.1
 * Fix: repeated metadata refresh with the Spark connector (SPARKC-633)

2.5.2 (included in 3.0.1)
 * C* 4.0-beta compatibility (SPARKC-615)
 * Storage Attached Index (SAI) support (SPARKC-621)
 * Java Driver upgraded to 4.10 (SPARKC-637)
 * Asynchronous page fetching (SPARKC-619)
 * Cassandra Direct Join in the Spark SQL (SPARKC-613)
 * Fix: ContinuousPaging settings are ignored (SPARKC-606)
 * Fix: spark.cassandra.input.readsPerSec doesn't work for CassandraJoinRDD (SPARKC-627)
 * Fix: repartitionByCassandraReplica relocates data to the local node only (SPARKC-642)
 * Fix: Custom ConnectionFactory properties are ignored in per-cluster setups (SPARKC-635)

3.0.0
 * Update Spark to 3.0.1 and commons-lang to 3.9
 * Remove full table scans performance regression (SPARKC-614)
 * Restore PrefetchingResultSetIterator (SPARKC-619)
 * Restore ContinuousPaging properties (SPARKC-606)
 * Integration tests work with C* 4.0.0-beta (SPARKC-615)
 * Fix USE <catalog> command (SPARKC-615)

3.0.0-beta
 * Data Source v2 support
 * Secondary artifact with shaded typesafe.config

2.5.1
 * Introduce shaded version of the main artifact to fix integration with Databricks Cloud
 * Exclude com.github.jnr and org.apache.tinkerpop dependencies to fix --packages
 * Improve Astra connection properties

2.5.0
 * LTS Release for Spark 2.4

3.0.0-Alpha2 (Included in 2.5.0)
 * Add ReadConf Parameter to JoinWithCassandraTable Methods (SPARKC-570)
 * Change Dse Prefixed Parameters (SPARKC-575)
 * Update Reference Docs (SPARKC-574)
 * Re-enable Travis CI (SPARKC-573)
 * Control when resolution of Contact Points Occurs (SPARKC-571)


3.0.0-Alpha (Included in 2.5.0)
  * Include all DS Specific Features
     * Includes CassandraHiveMetastore
     * Structured Streaming Sink Support
     * DirectJoin Catalyst Optimziation
     * Ttl and Writetime functions for Dataframes
     * Astra and Java Driver 4.0 Support
     * InJoin Optimizations
     * Read Throttle
     * Continuous Paging For DSE Clusters
     * More

*******************************************************************************

2.4.3
  * Fix issue with Hadoop3 Compatibility

2.4.2
  * Support for Scala 2.12 (SPARKC-458)

2.4.1
 * Includes all up to 2.3.3

2.4.0
 * Support for Spark 2.4

********************************************************************************

2.3.3
 * Includes all patches up to 2.0.11

2.3.2
 * Includes all patches up to 2.0.10

2.3.1
 * Includes all patches up to 2.0.9

2.3.0
 * Support for Spark 2.3.0 (SPARKC-530)
 * Pushdown filter for composite partition keys doesn't work (SPARKC-490)
 * Removal of Scala-2.10 support

********************************************************************************

2.0.11
 * Added case in StringConverter to properly output InetAddress (SPARKC-559)
 * Added java.time.Instant -> java.util.Date conversion (SPARKC-560)
 * RegularStatements not Cached by SessionProxy (SPARKC-558)
 * Fix CassandraSourceRelation Option Parsing in Spark 2.0 (SPARKC-551)

2.0.10
 * Includes all patches up to 1.6.13

2.0.9
 * Includes all patches up to 1.6.12

2.0.8
 * Allow non-cluster prefixed options in sqlConf (SPARKC-531)
 * Change Str Literal Match to Be Greedy (SPARKC-532)
 * Restore support for various timezone formats to TimestampParser (SPARKC-533)
 * UDT converters optimization (SPARKC-536)

2.0.7
 * Adds Timestamp, Improve Conversion Perf (SPARKC-522)
 * Allow setting spark.cassandra.concurrent.reads (SPARKC-520)
 * Allow splitCount to be set for Dataframes (SPARKC-527)

2.0.6
 * Includes all patches up to 1.6.10

2.0.5
 * Allow IN predicates for composite partition keys and clustering keys to be pushed down to Cassandra (SPARKC-490)
 * Allow 'YYYY' format LocalDate
 * Add metrics for write batch Size (SPARKC-501)
 * Type Converters for java.time.localdate (SPARKC-495)

2.0.4
 * Includes partches up to 1.6.9
 * Retry PoolBusy Exceptions, Throttle JWCT Calls (SPARKC-503) 

2.0.3
 * Includes patches up to 1.6.8

2.0.2
 * Protect against Size Estimate Overflows (SPARKC-492)
 * Add java.time classes support to converters and sparkSQL(SPARKC-491)
 * Allow Writes to Static Columnns and Partition Keys (SPARKC-470)

2.0.1
 * Refactor Custom Scan Method (SPARKC-481)

2.0.0
 * Upgrade driver version for 2.0.0 Release to 3.1.4 (SPARKC-474)
 * Extend SPARKC-383 to All Row Readers (SPARKC-473)

2.0.0 RC1
 * Includes all patches up to 1.6.5
 * Automatic adjustment of Max Connections (SPARKC-471)
 * Allow for Custom Table Scan Method (SPARKC-459)
 * Enable PerPartitionLimit (SPARKC-446)
 * Support client certificate authentication for two-way SSL Encryption (SPARKC-359)
 * Change Config Generation for Cassandra Runners (SPARKC-424)
 * Remove deprecated QueryRetryDelay parameter (SPARKC-423)
 * User ConnectionHostParam.default as default hosts String
 * Update usages of deprecated SQLContext so that SparkSession is used instead (SPARKC-400)
 * Test Reused Exchange SPARK-17673 (SPARKC-429)
 * Module refactoring (SPARKC-398)
 * Recognition of Java Driver Annotated Classes (SPARKC-427)
 * RDD.deleteFromCassandra (SPARKC-349)
 * Coalesce Pushdown to Cassandra (SPARKC-161)
 * Custom Conf options in Custom Pushdowns (SPARKC-435)
 * Upgrade CommonBeatUtils to 1.9.3 to Avoid SID-760 (SPARKC-457)

2.0.0 M3
 * Includes all patches up to 1.6.2

2.0.0 M2
 * Includes all patches up to 1.6.1

2.0.0 M1
 * Added support for left outer joins with C* table (SPARKC-181)
 * Removed CassandraSqlContext and underscore based options (SPARKC-399)
 * Upgrade to Spark 2.0.0-preview (SPARKC-396)
    - Removed Twitter demo because there is no spark-streaming-twitter package available anymore
    - Removed Akka Actor demo becaues there is no support for such streams anymore
    - Bring back Kafka project and make it compile
    - Update several classes to use our Logging instead of Spark Logging because Spark Logging became private
    - Update few components and tests to make them work with Spark 2.0.0
    - Fix Spark SQL - temporarily
    - Update plugins and Scala version

********************************************************************************

1.6.13
* Fix Thread Safety issue in AnyObjectFactory (SPARKC-550)

1.6.12
* Ignore Solr_query when setting up Writing (SPARKC-541)
* Backport of SPARKC-503 - JWCT Query Throttling (SPARKC-542)
* Allow Split Count to be passed to CassandraSourceRelation (SPARKC-527)
* Allow setting spark.cassandra.concurrent.reads in SparkConf (SPARKC-520)

1.6.11
* SPARKC-318: Nested columns in an MBean cannot be null

1.6.10
* Fix reading null UDTs into POJOs (SPARKC-426)
* Improvements in JWCT Performance and Retry Behavior (SPARKC-507)
* Fix TTL and WRITE time when used with Delete queries (SPARKC-505)
* Error message for WriteTime exception typo corrected

1.6.9
* Fix Shuffling of a Set in Local Node FirstPolicy (SPARKC-496)

1.6.8
* Fix ReplicaPartitioner Endpoint Call (SPARKC-485)
* MultipleRetryPolicy should retry with null (SPARKC-494)

1.6.7
* Protect against overflows in Size Estimates (SPARKC-492)
* Confirm truncation with datasource writes (SPARKC-472)

1.6.6
* Allow Writes to Static Columns and Partition Keys (SPARKC-470)
* SessionProxy Should Proxy all Runtime Interfaces (SPARKC-476)
* Always Use Codec Cache When Reading from Driver Rows (SPARKC-473)

1.6.5
* Optimize Spark Sql Count(*) with CassandraCount (SPARKC-412)
* Fix Incomplete Shading of Guava (SPARKC-461)
* Replace all Logging Dependencies from Spark-Core with Internal Class (SPARKC-460)
* Remove Java8 Dependency in CassandraConnectorConf (SPARKC-462)

1.6.4
 * Find converters for classes on different classloaders (SPARKC-363)
 * Fix CassandraConnector and Session Race Condition (SPARKC-441)
 * Fixed use of connection.local_dc parameter (SPARKC-448) 
 * Add RDD.deleteFromCassandra() method (SPARKC-349) (backport)
 * Left join with Cassandra (SPARKC-181) (backport)
 * CustomDriverConverter support for DataFrame Conversions (SPARKC-440)

1.6.3
 * Added SSL client authentication (SPARKC-359)
 * Correct order of "Limit" and "orderBy" clauses in JWCT (SPARKC-433)
 * Improved error messages on CreateCassandraTable from DataFrame (SPARKC-428)
 * Improved backwards compatibility with older Cassandra versions
   (SPARKC-387, SPARKC-402)
 * Fix partitioner on Integer.MIN_VALUE (SPARKC-419)

1.6.2
 * Fixed shading in artifacts published to Maven

1.6.1
 * Disallow TimeUUID Predicate Pushdown (SPARKC-405)
 * Avoid overflow on SplitSizeInMB param (SPARKC-413)
 * Fix conversion of LocalDate to Joda LocalDate (SPARKC-391)
 * Shade Guava to avoid conflict with outdated Guava in Spark (SPARKC-355)

1.6.0
 * SparkSql write supports TTL per row (SPARKC-345)
 * Make Repartition by Cassandra Replica Deterministic (SPARKC-278)
 * Improved performance by caching converters and Java driver codecs
   (SPARKC-383)
 * Added support for driver.LocalDate (SPARKC-385)
 * Accept predicates with indexed partition columns (SPARKC-348)
 * Retry schema checks to avoid Java Driver debouncing (SPARKC-379)
 * Fix compatibility with Cassandra 2.1.X with Single Partitions/In queries
   (SPARKC-376)
 * Use executeAsync while joining with C* table (SPARKC-233)
 * Fix support for C* Tuples in Dataframes (SPARKC-357)

1.6.0 M2
 * Performance improvement: keyBy creates an RDD with CassandraPartitioner
   so shuffling can be avoided in many cases, e.g. when keyBy is followed
   by groupByKey or join (SPARKC-330)
 * Improved exception message when data frame is to be saved in
   non-empty Cassandra table (SPARKC-338)
 * Support for Joda time for Cassandra date type (SPARKC-342)
 * Don't double resolve the paths for port locks in embedded C*
   (contribution by crakjie)
 * Drop indices that cannot be used in predicate pushdown (SPARKC-347)
 * Added support for IF NOT EXISTS (SPARKC-362)
 * Nested Optional Case Class can be save as UDT (SPARKC-346)
 * Merged Java API into main module (SPARKC-335)
 * Upgraded to Spark 1.6.1 (SPARKC-344)
 * Fix NoSuchElementException when fetching database schema from Cassandra
   (SPARKC-341)
 * Removed the ability to specify cluster alias directly and added some helper methods
   which make it easier to configure Cassandra related data frames (SPARKC-289)

1.6.0 M1
 * Adds the ability to add additional Predicate Pushdown Rules at Runtime (SPARKC-308)
 * Added CassandraOption for Skipping Columns when Writing to C* (SPARKC-283)
 * Upgrade Spark to 1.6.0 and add Apache Snapshot repository to resolvers (SPARKC-272, SPARKC-298, SPARKC-305)
 * Includes all patches up to 1.5.0.

********************************************************************************

1.5.2
* Find converters for classes on different classloaders (SPARKC-363)
* Disallow TimeUUID predicate pushdown (SPARKC-405)
* Avoid overflow on SplitSizeInMB param (SPARKC-413)
* Fix CassandraConnector and Session Race Condition (SPARKC-441)
* Correct Order of "limit" and "orderBy" clauses in JWCT (SPARKC-443)
* Fixed use of connection.local_dc parameter (SPARKC-448)

1.5.1
 * Includes all patches up to 1.4.4

1.5.0
 * Fixed assembly build (SPARKC-311)
 * Upgrade Cassandra version to 3.0.2 by default and allow to specify arbitrary Cassandra version for
   integration tests through the command line (SPARKC-307)
 * Upgrade Cassandra driver to 3.0.0 GA
 * Includes all patches up to 1.4.2.

1.5.0 RC1
 * Fix special case types in SqlRowWriter (SPARKC-306)
 * Fix sbt assembly
 * Create Cassandra Schema from DataFrame (SPARKC-231)
 * JWCT inherits Spark Conf from Spark Context (SPARKC-294)
 * Support of new Cassandra Date and Time types (SPARKC-277)
 * Upgrade Cassandra driver to 3.0.0-rc1

1.5.0 M3
 * Added ColumRef child class to represent functions calls (SPARKC-280)
 * Warn if Keep_alive_ms is less than spark batch size in streaming (SPARKC-228)
 * Fixed real tests (SPARKC-247)
 * Added support for tinyint and smallint types (SPARKC-269)
 * Updated Java driver version to 3.0.0-alpha4; Codec API changes (SPARKC-285)
 * Updated Java driver version to 3.0.0-alpha3 (SPARKC-270)
 * Changed the way CassandraConnectorSource is obtained due to SPARK-7171 (SPARKC-268)
 * Change write ConsistencyLevel to LOCAL_QUORUM (SPARKC-262)
 * Parallelize integration tests (SPARKC-293)
 * Includes all patches up to 1.4.1.

1.5.0 M2
 * Bump Java Driver to 2.2.0-rc3, Guava to 16.0.1 and test against Cassandra 2.2.1 (SPARKC-229)
 * Includes all patches up to 1.4.0.

1.5.0 M1
 * Added ability to build against unreleased Spark versions (SPARKC-242)
 * Spark 1.5 initial integration (SPARKC-241)

********************************************************************************

1.4.5
* Find converters for classes on different classloaders (SPARKC-363)
* Disallow TimeUUID predicate pushdown (SPARKC-405)
* Avoid overflow on SplitSizeInMB param (SPARKC-413)
* Fix CassandraConnector and Session Race Condition (SPARKC-441)
* Correct Order of "limit" and "orderBy" clauses in JWCT (SPARKC-443)
* Fixed use of connection.local_dc parameter (SPARKC-448)

1.4.4
 * Use executeAsync when joining with C* table (SPARKC-233)

1.4.3
 * Disable delayed retrying (SPARKC-360)
 * Improve DataFrames ErrorIfExists Message (SPARKC-338)

1.4.2
 * SqlRowWriter not using Cached Converters (SPARKC-329)
 * Fix Violation of Partition Contract (SPARKC-323)
 * Use ScalaReflectionLock from Spark instead of TypeTag
   to workaround Scala 2.10 reflection concurrency issues (SPARKC-333)

1.4.1
 * Let UDTs be converted from GenericRows (SPARKC-271)
 * Map InetAddress and UUID to string and store it as StringType in Spark SQL (SPARKC-259)
 * VarInt Column is converted to decimal stored in Spark SQL (SPARKC-266)
 * Retrieve TableSize from Cassandra system table for datasource relation (SPARKC-164)
 * Fix merge strategy for netty.io.properties (SPARKC-249)
 * Upgrade integration tests to use Cassandra 2.1.9 and upgrade Java Driver
   to 2.1.7.1, Spark to 1.4.1 (SPARKC-248)
 * Make OptionConverter handle Nones as well as nulls (SPARKC-275)

1.4.0
 * Fixed broken integration tests (SPARKC-247):
   - Fixed Scala reflection race condition in TupleColumnMapper.
   - Fixed dev/run-real-tests script.
   - Fixed CheckpointStreamSpec test.

1.4.0 RC1
 * Added TTL and WRITETIME documentation (SPARKC-244)
 * Reduced the amount of unneccessary error logging in integration tests (SPARKC-223)
 * Fixed Repartition and JWC and Streaming Checkpointing broken by serialization
   errors related to passing RowWriteFactory / DefaultRowWriter (SPARKC-202)
 * Fixed exceptions occuring when performing RDD operations on any
   CassandraTableScanJavaRDD (SPARKC-236)

1.4.0 M3
 * Fixed UDT column bug in SparkSQL (SPARKC-219)
 * Includes all patches up to release 1.2.5 and 1.3.0
   - Fixed connection caching, changed SSL EnabledAlgorithms to Set (SPARKC-227)

1.4.0 M2
 * Includes some unreleased patches from 1.2.5
   - Changed default query timeout from 12 seconds to 2 minutes (SPARKC-220)
   - Add a configurable delay between subsequent query retries (SPARKC-221)
   - spark.cassandra.output.throughput_mb_per_sec can now be set to a decimal (SPARKC-226)
 * Includes unreleased patches from 1.3.0
   - Remove white spaces in c* connection host string (fix by Noorul Islam K M)
 * Includes all changes up to 1.3.0-RC1.

1.4.0 M1
 * Upgrade Spark to 1.4.0 (SPARKC-192)
 * Added support timestamp in collection, udt and tuples (SPARKC-254)

********************************************************************************

 * Fixed use of connection.local_dc parameter (SPARKC-448)
 * Added support timestamp in collection, udt and tuples (SPARKC-254)

1.3.1
 * Remove wrapRDD from CassandraTableScanJavaRDD. Fixes exception occuring
   when performing RDD operations on any CassandraTableScanJavaRDD (SPARKC-236)
 * Backport synchronization fixes from 1.4.0 (SPARKC-247)

1.3.0
 * Remove white spaces in c* connection host string (fix by Noorul Islam K M)
 * Included from 1.2.5
   - Changed default query timeout from 12 seconds to 2 minutes (SPARKC-220)
   - Add a configurable delay between subsequent query retries (SPARKC-221)
   - spark.cassandra.output.throughput_mb_per_sec can now be set to a decimal (SPARKC-226)
   - Fixed connection caching, changed SSL EnabledAlgorithms to Set (SPARKC-227)

1.3.0 RC1
 * Fixed NoSuchElementException when using UDTs in SparkSQL (SPARKC-218)

1.3.0 M2
 * Support for loading, saving and mapping Cassandra tuples (SPARKC-172)
 * Support for mapping case classes to UDTs on saving (SPARKC-190)
 * Table and keyspace Name suggestions in DataFrames API (SPARKC-186)
 * Removed thrift completely (SPARKC-94)
   - removed cassandra-thrift.jar dependency
   - automatic split sizing based on system.size_estimates table
   - add option to manually force the number of splits
   - Cassandra listen addresses fetched from system.peers table
   - spark.cassandra.connection.(rpc|native).port replaced with spark.cassandra.connection.port
 * Refactored ColumnSelector to avoid circular dependency on TableDef (SPARKC-177)
 * Support for modifying C* Collections using saveToCassandra (SPARKC-147)
 * Added the ability to use Custom Mappers with repartitionByCassandraReplica (SPARKC-104)
 * Added methods to work with tuples in Java API (SPARKC-206)
 * Fixed input_split_size_in_mb property (SPARKC-208)
 * Fixed DataSources tests when connecting to an external cluster (SPARKC-178)
 * Added Custom UUIDType and InetAddressType to Spark Sql data type mapping (SPARKC-129)
 * Removed CassandraRelation by CassandraSourceRelation and Added cache to
   CassandraCatalog (SPARKC-163)

1.3.0 M1
 * Removed use of Thrift describe_ring and replaced it with native Java Driver
   support for fetching TokenRanges (SPARKC-93)
 * Support for converting Cassandra UDT column values to Scala case-class objects (SPARKC-4)
   - Introduced a common interface for TableDef and UserDefinedType
   - Removed ClassTag from ColumnMapper
   - Removed by-index column references and replaced them with by-name ColumnRefs
   - Created a GettableDataToMappedTypeConverter that can handle UDTs
   - ClassBasedRowReader delegates object conversion instead of doing it by itself;
     this improves unit-testability of code
 * Decoupled PredicatePushDown logic from Spark (SPARKC-166)
   - added support for Filter and Expression predicates
   - improved code testability and added unit-tests
 * Basic Datasource API integration and keyspace/cluster level settings (SPARKC-112, SPARKC-162)
 * Added support to use aliases with Tuples (SPARKC-125)

********************************************************************************

 * Fixed use of connection.local_dc parameter (SPARKC-448)

1.2.6
 * Fixed Default ReadConf for JoinWithCassandra Table (SPARKC-294)
 * Added refresh cassandra schema cache to CassandraSQLContext (SPARKC-234)

1.2.5
 * Changed default query timeout from 12 seconds to 2 minutes (SPARKC-220)
 * Add a configurable delay between subsequent query retries (SPARKC-221)
 * spark.cassandra.output.throughput_mb_per_sec can now be set to a decimal (SPARKC-226)
 * Fixed connection caching, changed SSL EnabledAlgorithms to Set (SPARKC-227)

1.2.4
 * Cassandra native count is performed by `cassandraCount` method (SPARKC-215)

1.2.3
 * Support for connection compressions configuration (SPARKC-124)
 * Support for connection encryption configuration (SPARKC-118)
 * Fix a bug to support upper case characters in UDT (SPARKC-201)
 * Meaningful exception if some partition key column is null (SPARKC-198)
 * Improved reliability of thread-leak test (SPARKC-205)

1.2.2
 * Updated Spark version to 1.2.2, Scala to 2.10.5 / 2.11.6
 * Enabled Java API artifact generation for Scala 2.11.x (SPARKC-130)
 * Fixed a bug preventing a custom type converter from being used
   when saving data. RowWriter implementations must
   perform type conversions now. (SPARKC-157)

1.2.1
 * Fixed problems with mixed case keyspaces in ReplicaMapper (SPARKC-159)

1.2.0
 * Removed conversion method rom WriteOption which accepted object of Duration type
   from Spark Streaming (SPARKC-106)
 * Fixed compilation warnings (SPARKC-76)
 * Fixed ScalaDoc warnings (SPARKC-119)
 * Synchronized TypeTag access in various places (SPARKC-123)
 * Adds both hostname and hostaddress as partition preferredLocations (SPARKC-126)

1.2.0 RC 3
 * Select aliases are no longer ignored in CassandraRow objects (SPARKC-109)
 * Fix picking up username and password from SparkConf (SPARKC-108)
 * Fix creating CassandraConnectorSource in the executor environment (SPARKC-111)

1.2.0 RC 2
 * Cross cluster table join and write for Spark SQL (SPARKC-73)
 * Enabling / disabling metrics in metrics configuration file and other metrics fixes (SPARKC-91)
 * Provided a way to set custom auth config and connection factory properties (SPARKC-105)
 * Fixed setting custom connection factory and other properties (SPAKRC-102)
 * Fixed Java API (SPARKC-95)

1.2.0 RC 1
 * More Spark SQL predicate push (SPARKC-72)
 * Fixed some Java API problems and refactored its internals (SPARKC-77)
 * Allowing specification of column to property map (aliases) for reading and writing objects
   (SPARKC-9)
 * Added interface for doing primary key joins between arbitrary RDDs and Cassandra (SPARKC-25)
 * Added method for repartitioning an RDD based upon the replication of a Cassandra Table (SPARKC-25)
 * Fixed setting batch.level and batch.buffer.size in SparkConf. (SPARKC-84)
   - Renamed output.batch.level to output.batch.grouping.key.
   - Renamed output.batch.buffer.size to output.batch.grouping.buffer.size.
   - Renamed batch grouping key option "all" to "none".
 * Error out on invalid config properties (SPARKC-90)
 * Set Java driver version to 2.1.5 and Cassandra to 2.1.3 (SPARKC-92)
 * Moved Spark streaming related methods from CassandraJavaUtil to CassandraStreamingJavaUtil
   (SPARKC-80)

1.2.0 alpha 3
 * Exposed spanBy and spanByKey in Java API (SPARKC-39)
 * Added automatic generation of Cassandra table schema from a Scala type and
   saving an RDD to a new Cassandra table by saveAsCassandraTable method (SPARKC-38)
 * Added support for write throughput limiting (SPARKC-57)
 * Added EmptyCassandraRDD (SPARKC-37)
 * Exposed authConf in CassandraConnector
 * Overridden count() implementation in CassandraRDD which uses native Cassandra count (SPARKC-52)
 * Removed custom Logging class (SPARKC-54)
 * Added support for passing the limit clause to CQL in order to fetch top n results (SPARKC-31)
 * Added support for pushing down order by clause for explicitly specifying an order of rows within
   Cassandra partition (SPARKC-32)
 * Fixed problems when rows are mapped to classes with inherited fields (SPARKC-70)
 * Support for compiling with Scala 2.10 and 2.11 (SPARKC-22)

1.2.0 alpha 2
 * All connection properties can be set on SparkConf / CassandraConnectorConf objects and
   the settings are automatically distributed to Spark Executors (SPARKC-28)
 * Report Connector metrics to Spark metrics system (SPARKC-27)
 * Upgraded to Spark 1.2.1 (SPARKC-30)
 * Add conversion from java.util.Date to java.sqlTimestamp for Spark SQL (#512)
 * Upgraded to Scala 2.11 and scala version cross build (SPARKC-22)

1.2.0 alpha 1
 * Added support for TTL and timestamp in the writer (#153)
 * Added support for UDT column types (SPARKC-1)
 * Upgraded Spark to version 1.2.0 (SPARKC-15)
 * For 1.2.0 release, table name with dot is not supported for Spark SQL,
   it will be fixed in the next release
 * Added fast spanBy and spanByKey methods to RDDs useful for grouping Cassandra
   data by partition key / clustering columns. Useful for e.g. time-series data. (SPARKC-2)
 * Refactored the write path so that the writes are now token-aware (SPARKC-5, previously #442)
 * Added support for INSET predicate pushdown (patch by granturing)

********************************************************************************

1.1.2
 * Backport SPARKC-8, retrieval of TTL and write time
 * Upgraded to Spark 1.1.1
 * Synchronized ReflectionUtil findScalaObject and findSingletonClassInstance methods
   to avoid problems with Scala 2.10 lack thread safety in the reflection subsystem (SPARKC-107)
 * Fixed populating ReadConf with properties from SparkConf (SPARKC-121)
 * Adds both hostname and hostaddress as partition preferredLocations (SPARKC-141, backport of SPARKC-126)

1.1.1
 * Fixed NoSuchElementException in SparkSQL predicate pushdown code (SPARKC-7, #454)

1.1.0
 * Switch to java driver 2.1.3 and Guava 14.0.1 (yay!).

1.1.0 rc 3
 * Fix NPE when saving CassandraRows containing null values (#446)

1.1.0 rc 2
 * Added JavaTypeConverter to make is easy to implement custom TypeConverter in Java (#429)
 * Fix SparkSQL failures caused by presence of non-selected columns of UDT type in the table.

1.1.0 rc 1
 * Fixed problem with setting a batch size in bytes (#435)
 * Fixed handling of null column values in Java API (#429)

1.1.0 beta 2
 * Fixed bug in Java API which might cause ClassNotFoundException
 * Added stubs for UDTs. It is possible to read tables with UDTs, but
   values of UDTs will come out as java driver UDTValue objects (#374)
 * Upgraded Java driver to 2.1.2 version and fixed deprecation warnings.
   Use correct protocolVersion when serializing/deserializing Cassandra columns.
 * Don't fail with "contact points contain multiple datacenters"
   if one or more of the nodes given as contact points don't have DC information,
   because they are unreachable.
 * Removed annoying slf4j warnings when running tests (#395)
 * CassandraRDD is fully lazy now - initialization no longer fetches Cassandra
   schema (#339).

1.1.0 beta 1
 * Redesigned Java API, some refactorings (#300)
 * Simplified AuthConf - more responsibility on CassandraConnectionFactory
 * Enhanced and improved performance of the embedded Kafka framework
    - Kafka consumer and producer added that are configurable
    - Kafka shutdown cleaned up
    - Kafka server more configurable for speed and use cases
 * Added new word count demo and a new Kafka streaming word count demo
 * Modified build file to allow easier module id for usages of 'sbt project'


1.1.0 alpha 4
 * Use asynchronous prefetching of multi-page ResultSets in CassandraRDD
   to reduce waiting for Cassandra query results.
 * Make token range start and end be parameters of the query, not part of the query
   template to reduce the number of statements requiring preparation.
 * Added type converter for GregorianCalendar (#334)

1.1.0 alpha 3
 * Pluggable mechanism for obtaining connections to Cassandra
   Ability to pass custom CassandraConnector to CassandraRDDs (#192)
 * Provided a row reader which allows to create RDDs of pairs of objects as well
   as RDDs of simple objects handled by type converter directly;
   added meaningful compiler messages when invalid type was provided (#88)
 * Fixed serialization problem in CassandraSQLContext by making conf transient (#310)
 * Cleaned up the SBT assembly task and added build documentation (#315)

1.1.0 alpha 2
 * Upgraded Apache Spark to 1.1.0.
 * Upgraded to be Cassandra 2.1.0 and Cassandra 2.0 compatible.
 * Added spark.cassandra.connection.local_dc option
 * Added spark.cassandra.connection.timeout_ms option
 * Added spark.cassandra.read.timeout_ms option
 * Added support for SparkSQL (#197)
 * Fixed problems with saving DStreams to Cassandra directly (#280)

1.1.0 alpha 1
 * Add an ./sbt/sbt script (like with spark) so people don't need to install sbt
 * Replace internal spark Logging with own class (#245)
 * Accept partition key predicates in CassandraRDD#where. (#37)
 * Add indexedColumn to ColumnDef (#122)
 * Upgrade Spark to version 1.0.2
 * Removed deprecated toArray, replaced with collect.
 * Updated imports to org.apache.spark.streaming.receiver
   and import org.apache.spark.streaming.receiver.ActorHelper
 * Updated streaming demo and spec for Spark 1.0.2 behavior compatibility
 * Added new StreamingEvent types for Spark 1.0.2 Receiver readiness
 * Added the following Spark Streaming dependencies to the demos module:
   Kafka, Twitter, ZeroMQ
 * Added embedded Kafka and ZooKeeper servers for the Kafka Streaming demo
   - keeping non private for user prototyping
 * Added new Kafka Spark Streaming demo which reads from Kafka
   and writes to Cassandra (Twitter and ZeroMQ are next)
 * Added new 'embedded' module
   - Refactored the 'connector' module's IT SparkRepl, CassandraServer and
     CassandraServerRunner as well as 'demos' EmbeddedKafka
     and EmbeddedZookeeper to the 'embedded' module. This allows the 'embedded'
     module to be used as a dependency by the 'connector' IT tests, demos,
     and user local quick prototyping without requiring a Spark and Cassandra
     Cluster, local or remote, to get started.

********************************************************************************
1.0.7 (unreleased)
 * Improved error message when attempting to transform CassandraRDD after deserialization (SPARKC-29)

1.0.6
 * Upgraded Java Driver to 2.0.8 and added some logging in LocalNodeFirstLoadBalancingPolicy (SPARKC-18)
 
1.0.5
 * Fixed setting output consistency level which was being set on prepared
   statements instead of being set on batches (#463)

1.0.4
 * Synchronized TypeConverter.forType methods to workaround some Scala 2.10
   reflection thread-safety problems (#235)
 * Synchronized computation of TypeTags in TypeConverter#targetTypeTag, 
   ColumnType#scalaTypeTag methods and other places to workaround some of 
   Scala 2.10 reflection thread-safety problems (#364)
 * Downgraded Guava to version 14.
   Upgraded Java driver to 2.0.7.
   Upgraded Cassandra to 2.0.11. (#366)
 * Made SparkContext variable transient in SparkContextFunctions (#373)
 * Fixed saving to tables with uppercase column names (#377)
 * Fixed saving collections of Tuple1 (#420)

1.0.3
 * Fixed handling of Cassandra rpc_address set to 0.0.0.0 (#332)

1.0.2
 * Fixed batch counter columns updates (#234, #316)
 * Expose both rpc addresses and local addresses of cassandra nodes in partition
   preferred locations (#325)
 * Cleaned up the SBT assembly task and added build documentation
   (backport of #315)

1.0.1
 * Add logging of error message when asynchronous task fails in AsyncExecutor.
   (#265)
 * Fix connection problems with fetching token ranges from hosts with
   rpc_address different than listen_address.
   Log host address(es) and ports on connection failures.
   Close thrift transport if connection fails for some reason after opening the transport,
   e.g. authentication failure.
 * Upgrade cassandra driver to 2.0.6.

1.0.0
 * Fix memory leak in PreparedStatementCache leaking PreparedStatements after
   closing Cluster objects. (#183)
 * Allow multiple comma-separated hosts in spark.cassandra.connection.host

1.0.0 RC 6
 * Fix reading a Cassandra table as an RDD of Scala class objects in REPL

1.0.0 RC 5
 * Added assembly task to the build, in order to build fat jars. (#126)
   - Added a system property flag to enable assembly for the demo module
     which is disabled by default.
   - Added simple submit script to submit a demo assembly jar to a local
     spark master
 * Fix error message on column conversion failure. (#208)
 * Add toMap and nameOf methods to CassandraRow.
   Reduce size of serialized CassandraRow. (#194)
 * Fixed a bug which caused problems with connecting to Cassandra under
   heavy load (#185)
 * Skip $_outer constructor param in ReflectionColumnMapper, fixes working with
   case classes in Spark shell, added appropriate test cases (#188)
 * Added streaming demo with documentation, new streaming page to docs,
   new README for running all demos. (#115)

1.0.0 RC 4
 * Upgrade Java driver for Cassandra to 2.0.4. (#171)
 * Added missing CassandraRDD#getPreferredLocations to improve data-locality. (#164)
 * Don't use hosts outside the datacenter of the connection host. (#137)

1.0.0 RC 3
 * Fix open Cluster leak in CassandraConnector#createSession (#142)
 * TableWriter#saveToCassandra accepts ColumnSelector instead of Seq[String] for
   passing a column list. Seq[String] still accepted for backwards compatibility,
   but deprecated.
 * Added Travis CI build yaml file.
 * Added demos module. (#84)
 * Extracted Java API into a separate module (#99)

1.0.0 RC 2
 * Language specific highlighting in the documentation (#105)
 * Fixed a bug which caused problems when a column of VarChar type was used
   in where clause. (04fd8d9)
 * Fixed an AnyObjectFactory bug which caused problems with instantiation of
   classes which were defined inside Scala objects. (#82)
 * Added support for Spark Streaming. (#89)
    - Added implicit wrappers which simplify access to Cassandra related
      functionality from StreamingContext and DStream.
    - Added a stub for further Spark Streaming integration tests.
 * Upgraded Java API. (#98)
    - Refactored existing Java API
    - Added CassandraJavaRDD as a JAVA counterpart of CassandraRDD
    - Added Java helpers for accessing Spark Streaming related methods
    - Added several integration tests
    - Added a documentation page for JAVA API
    - Extended Java API demo
    - Added a lot of API docs

1.0.0 RC 1
 * Ability to register custom TypeConverters. (#32)
 * Handle null values in StringConverter. (#79)
 * Improved error message when there are no replicas in the local DC. (#69)

1.0.0 beta 2
 * DSE compatibility improvements. (#64)
    - Column types and type converters use TypeTags instead of Strings to
      announce their types.
    - CassandraRDD#tableDef is public now.
    - Added methods for getting keyspaces and tables by name from the Schema.
    - Refactored Schema class - loading schema from Cassandra moved
      from the constructor to a factory method.
    - Remove unused methods for returning system keyspaces from Schema.
 * Improved JavaDoc explaining CassandraConnector withClusterDo
   and withSessionDo semantics.
 * Support for updating counter columns. (#27)
 * Configure consistency level for reads/writes. Set default consistency
   levels to LOCAL_ONE for reads and writes. (#42)
 * Values passed as arguments to `where` are converted to proper types
   expected by the java-driver. (#26)
 * Include more information in the exception message when query in
   CassandraRDD fails. (#69)
 * Fallback to describe_ring in case describe_local_ring does not exist to
   improve compatibility with earlier Cassandra versions. (#47)
 * Session object sharing in CassandraConnector. (#41 and #53)
 * Modify cassandra.* configuration settings to prefix with "spark." so they
   can be used from spark-shell and set via conf/spark-default.conf (#51)
 * Fixed race condition in AsyncExecutor causing inaccuracy of success/failure
   counters. (#40)
 * Added Java API. Fixed a bug in ClassBasedRowReader which caused
   problems when data were read into Java beans. Added type converters
   for boxed Java primitive types. (#11)
 * Extracted out initial testkit for unit and integration tests, and future
   testkit module.
 * Added new WritableToCassandra trait which both RDDFunction and
   DStreamFunction both implement. Documentation moved to WritableToCassandra.
 * Fixed broken links in API documentation.
 * Refactored RDDFunctions and DStreamFunctions - merged saveToCassandra
   overloaded methods into a single method with defaults.

1.0.0 beta 1
 * CassandraRDD#createStatement doesn't obtain a new session, but reuses
   the task's Session.
 * Integration tests. (#12)
 * Added contains and indexOf methods to CassandraRow. Missing value from
   CassandraRow does not break writing - null is written instead.
 * Caching of PreparedStatements. Subsequent preparations of the same
   PreparedStatement are returned from the cache and don't cause
   a warning. (#3)
 * Move partitioner ForkJoinPool to companion object to share it between RDD's.
   (#24)
 * Fixed thread-safety of ClassBasedRowReader.
 * Detailed user guide with code examples, reviewed by Kris Hahn. (#15)
 * Support for saving RDD[CassandraRow]. New demo program copying data from one
   table to another. (#16)
 * Using a PreparedStatement make createStatement method compatible with
   Cassandra 1.2.x. (#17)
 * More and better logging. Using org.apache.spark.Logging instead of log4j.
   (#13)
 * Better error message when attempting to write to a table that doesn't exist.
   (#1)
 * Added more robust scala build to allow for future clean releases, and
   publish settings for later integration. (#8)
 * Refactored classes and objects used for authentication to support pluggable
   authentication.
 * Record cause of TypeConversionException.
 * Improved error messages informing about failure to convert column value.
   Fixed missing conversion for setters.
 * Split CassandraWriter into RowWriter and TableWriter.
 * Refactored package structure. Moved classes from rdd to rdd.reader
   and rdd.partitioner packages. Renamed RowTransformers to RowReaders.
 * Fix writing ByteBuffers to Cassandra.
 * Throw meaningful exception when non-existing column is requested by name.
 * Add isNull method on CassandraRow.
 * Fix converting blobs to arrays of bytes in CassandraRow. Fix printing blobs
   and collections.