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* [SPARK-7407] [MLLIB] use uid + name to identify parametersXiangrui Meng2015-05-1447-213/+452
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A param instance is strongly attached to an parent in the current implementation. So if we make a copy of an estimator or a transformer in pipelines and other meta-algorithms, it becomes error-prone to copy the params to the copied instances. In this PR, a param is identified by its parent's UID and the param name. So it becomes loosely attached to its parent and all its derivatives. The UID is preserved during copying or fitting. All components now have a default constructor and a constructor that takes a UID as input. I keep the constructors for Param in this PR to reduce the amount of diff and moved `parent` as a mutable field. This PR still needs some clean-ups, and there are several spark.ml PRs pending. I'll try to get them merged first and then update this PR. jkbradley Author: Xiangrui Meng <meng@databricks.com> Closes #6019 from mengxr/SPARK-7407 and squashes the following commits: c4c8120 [Xiangrui Meng] Merge remote-tracking branch 'apache/master' into SPARK-7407 520f0a2 [Xiangrui Meng] address comments 2569168 [Xiangrui Meng] fix tests 873caca [Xiangrui Meng] fix tests in OneVsRest; fix a racing condition in shouldOwn 409ea08 [Xiangrui Meng] minor updates 83a163c [Xiangrui Meng] update JavaDeveloperApiExample 5db5325 [Xiangrui Meng] update OneVsRest 7bde7ae [Xiangrui Meng] merge master 697fdf9 [Xiangrui Meng] update Bucketizer 7b4f6c2 [Xiangrui Meng] Merge remote-tracking branch 'apache/master' into SPARK-7407 629d402 [Xiangrui Meng] fix LRSuite 154516f [Xiangrui Meng] merge master aa4a611 [Xiangrui Meng] fix examples/compile a4794dd [Xiangrui Meng] change Param to use to reduce the size of diff fdbc415 [Xiangrui Meng] all tests passed c255f17 [Xiangrui Meng] fix tests in ParamsSuite 818e1db [Xiangrui Meng] merge master e1160cf [Xiangrui Meng] fix tests fbc39f0 [Xiangrui Meng] pass test:compile 108937e [Xiangrui Meng] pass compile 8726d39 [Xiangrui Meng] use parent uid in Param eaeed35 [Xiangrui Meng] update Identifiable
* [SPARK-7595] [SQL] Window will cause resolve failed with self joinlinweizhong2015-05-142-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | for example: table: src(key string, value string) sql: with v1 as(select key, count(value) over (partition by key) cnt_val from src), v2 as(select v1.key, v1_lag.cnt_val from v1, v1 v1_lag where v1.key = v1_lag.key) select * from v2 limit 5; then will analyze fail when resolving conflicting references in Join: 'Limit 5 'Project [*] 'Subquery v2 'Project ['v1.key,'v1_lag.cnt_val] 'Filter ('v1.key = 'v1_lag.key) 'Join Inner, None Subquery v1 Project [key#95,cnt_val#94L] Window [key#95,value#96], [HiveWindowFunction#org.apache.hadoop.hive.ql.udf.generic.GenericUDAFCount(value#96) WindowSpecDefinition [key#95], [], ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING AS cnt_val#94L], WindowSpecDefinition [key#95], [], ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING Project [key#95,value#96] MetastoreRelation default, src, None Subquery v1_lag Subquery v1 Project [key#97,cnt_val#94L] Window [key#97,value#98], [HiveWindowFunction#org.apache.hadoop.hive.ql.udf.generic.GenericUDAFCount(value#98) WindowSpecDefinition [key#97], [], ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING AS cnt_val#94L], WindowSpecDefinition [key#97], [], ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING Project [key#97,value#98] MetastoreRelation default, src, None Conflicting attributes: cnt_val#94L Author: linweizhong <linweizhong@huawei.com> Closes #6114 from Sephiroth-Lin/spark-7595 and squashes the following commits: f8f2637 [linweizhong] Add unit test dfe9169 [linweizhong] Handle windowExpression with self join
* [SPARK-7620] [ML] [MLLIB] Removed calling size, length in while condition to ↵DB Tsai2015-05-1313-44/+73
| | | | | | | | | | | avoid extra JVM call Author: DB Tsai <dbt@netflix.com> Closes #6137 from dbtsai/clean and squashes the following commits: 185816d [DB Tsai] fix compilication issue f418d08 [DB Tsai] first commit
* [SPARK-7612] [MLLIB] update NB training to use mllib's BLASXiangrui Meng2015-05-131-23/+20
| | | | | | | | | | | This is similar to the changes to k-means, which gives us better control on the performance. dbtsai Author: Xiangrui Meng <meng@databricks.com> Closes #6128 from mengxr/SPARK-7612 and squashes the following commits: b5c24c5 [Xiangrui Meng] merge master a90e3ec [Xiangrui Meng] update NB training to use mllib's BLAS
* [HOT FIX #6125] Do not wait for all stages to start renderingAndrew Or2015-05-132-17/+18
| | | | | | | | | | | | zsxwing Author: Andrew Or <andrew@databricks.com> Closes #6138 from andrewor14/dag-viz-clean-properly and squashes the following commits: 19d4e98 [Andrew Or] Add synchronize 02542d6 [Andrew Or] Rename overloaded variable d11bee1 [Andrew Or] Don't wait until all stages have started before rendering
* [HOTFIX] Use 'new Job' in fsBasedParquet.scalazsxwing2015-05-131-1/+1
| | | | | | | | | | | | Same issue as #6095 cc liancheng Author: zsxwing <zsxwing@gmail.com> Closes #6136 from zsxwing/hotfix and squashes the following commits: 4beea54 [zsxwing] Use 'new Job' in fsBasedParquet.scala
* [HOTFIX] Bug in merge scriptPatrick Wendell2015-05-131-2/+1
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* [SPARK-6752] [STREAMING] [REVISED] Allow StreamingContext to be recreated ↵Tathagata Das2015-05-134-180/+9
| | | | | | | | | | | | | | | | | | | | | | from checkpoint and existing SparkContext This is a revision of the earlier version (see #5773) that passed the active SparkContext explicitly through a new set of Java and Scala API. The drawbacks are. * Hard to implement in python. * New API introduced. This is even more confusing since we are introducing getActiveOrCreate in SPARK-7553 Furthermore, there is now a direct way get an existing active SparkContext or create a new on - SparkContext.getOrCreate(conf). Its better to use this to get the SparkContext rather than have a new API to explicitly pass the context. So in this PR I have * Removed the new versions of StreamingContext.getOrCreate() which took SparkContext * Added the ability to pick up existing SparkContext when the StreamingContext tries to create a SparkContext. Author: Tathagata Das <tathagata.das1565@gmail.com> Closes #6096 from tdas/SPARK-6752 and squashes the following commits: 53f4b2d [Tathagata Das] Merge remote-tracking branch 'apache-github/master' into SPARK-6752 f024b77 [Tathagata Das] Removed extra API and used SparkContext.getOrCreate
* [SPARK-7601] [SQL] Support Insert into JDBC DatasourceVenkata Ramana Gollamudi2015-05-132-2/+43
| | | | | | | | | | | | | | | | | | | | Supported InsertableRelation for JDBC Datasource JDBCRelation. Example usage: sqlContext.sql( s""" |CREATE TEMPORARY TABLE testram1 |USING org.apache.spark.sql.jdbc |OPTIONS (url '$url', dbtable 'testram1', user 'xx', password 'xx', driver 'com.h2.Driver') """.stripMargin.replaceAll("\n", " ")) sqlContext.sql("insert into table testram1 select * from testsrc") sqlContext.sql("insert overwrite table testram1 select * from testsrc") Author: Venkata Ramana Gollamudi <ramana.gollamudi@huawei.com> Closes #6121 from gvramana/JDBCDatasource_insert and squashes the following commits: f3fb5f1 [Venkata Ramana Gollamudi] Support for JDBC Datasource InsertableRelation
* [SPARK-7081] Faster sort-based shuffle path using binary processing ↵Josh Rosen2015-05-1333-64/+2767
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cache-aware sort This patch introduces a new shuffle manager that enhances the existing sort-based shuffle with a new cache-friendly sort algorithm that operates directly on binary data. The goals of this patch are to lower memory usage and Java object overheads during shuffle and to speed up sorting. It also lays groundwork for follow-up patches that will enable end-to-end processing of serialized records. The new shuffle manager, `UnsafeShuffleManager`, can be enabled by setting `spark.shuffle.manager=tungsten-sort` in SparkConf. The new shuffle manager uses directly-managed memory to implement several performance optimizations for certain types of shuffles. In cases where the new performance optimizations cannot be applied, the new shuffle manager delegates to SortShuffleManager to handle those shuffles. UnsafeShuffleManager's optimizations will apply when _all_ of the following conditions hold: - The shuffle dependency specifies no aggregation or output ordering. - The shuffle serializer supports relocation of serialized values (this is currently supported by KryoSerializer and Spark SQL's custom serializers). - The shuffle produces fewer than 16777216 output partitions. - No individual record is larger than 128 MB when serialized. In addition, extra spill-merging optimizations are automatically applied when the shuffle compression codec supports concatenation of serialized streams. This is currently supported by Spark's LZF serializer. At a high-level, UnsafeShuffleManager's design is similar to Spark's existing SortShuffleManager. In sort-based shuffle, incoming records are sorted according to their target partition ids, then written to a single map output file. Reducers fetch contiguous regions of this file in order to read their portion of the map output. In cases where the map output data is too large to fit in memory, sorted subsets of the output can are spilled to disk and those on-disk files are merged to produce the final output file. UnsafeShuffleManager optimizes this process in several ways: - Its sort operates on serialized binary data rather than Java objects, which reduces memory consumption and GC overheads. This optimization requires the record serializer to have certain properties to allow serialized records to be re-ordered without requiring deserialization. See SPARK-4550, where this optimization was first proposed and implemented, for more details. - It uses a specialized cache-efficient sorter (UnsafeShuffleExternalSorter) that sorts arrays of compressed record pointers and partition ids. By using only 8 bytes of space per record in the sorting array, this fits more of the array into cache. - The spill merging procedure operates on blocks of serialized records that belong to the same partition and does not need to deserialize records during the merge. - When the spill compression codec supports concatenation of compressed data, the spill merge simply concatenates the serialized and compressed spill partitions to produce the final output partition. This allows efficient data copying methods, like NIO's `transferTo`, to be used and avoids the need to allocate decompression or copying buffers during the merge. The shuffle read path is unchanged. This patch is similar to [SPARK-4550](http://issues.apache.org/jira/browse/SPARK-4550) / #4450 but uses a slightly different implementation. The `unsafe`-based implementation featured in this patch lays the groundwork for followup patches that will enable sorting to operate on serialized data pages that will be prepared by Spark SQL's new `unsafe` operators (such as the new aggregation operator introduced in #5725). ### Future work There are several tasks that build upon this patch, which will be left to future work: - [SPARK-7271](https://issues.apache.org/jira/browse/SPARK-7271) Redesign / extend the shuffle interfaces to accept binary data as input. The goal here is to let us bypass serialization steps in cases where the sort input is produced by an operator that operates directly on binary data. - Extension / redesign of the `Serializer` API. We can add new methods which allow serializers to determine the size requirements for serializing objects and for serializing objects directly to a specified memory address (similar to how `UnsafeRowConverter` works in Spark SQL). <!-- Reviewable:start --> [<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/apache/spark/5868) <!-- Reviewable:end --> Author: Josh Rosen <joshrosen@databricks.com> Closes #5868 from JoshRosen/unsafe-sort and squashes the following commits: ef0a86e [Josh Rosen] Fix scalastyle errors 7610f2f [Josh Rosen] Add tests for proper cleanup of shuffle data. d494ffe [Josh Rosen] Fix deserialization of JavaSerializer instances. 52a9981 [Josh Rosen] Fix some bugs in the address packing code. 51812a7 [Josh Rosen] Change shuffle manager sort name to tungsten-sort 4023fa4 [Josh Rosen] Add @Private annotation to some Java classes. de40b9d [Josh Rosen] More comments to try to explain metrics code df07699 [Josh Rosen] Attempt to clarify confusing metrics update code 5e189c6 [Josh Rosen] Track time spend closing / flushing files; split TimeTrackingOutputStream into separate file. d5779c6 [Josh Rosen] Merge remote-tracking branch 'origin/master' into unsafe-sort c2ce78e [Josh Rosen] Fix a missed usage of MAX_PARTITION_ID e3b8855 [Josh Rosen] Cleanup in UnsafeShuffleWriter 4a2c785 [Josh Rosen] rename 'sort buffer' to 'pointer array' 6276168 [Josh Rosen] Remove ability to disable spilling in UnsafeShuffleExternalSorter. 57312c9 [Josh Rosen] Clarify fileBufferSize units 2d4e4f4 [Josh Rosen] Address some minor comments in UnsafeShuffleExternalSorter. fdcac08 [Josh Rosen] Guard against overflow when expanding sort buffer. 85da63f [Josh Rosen] Cleanup in UnsafeShuffleSorterIterator. 0ad34da [Josh Rosen] Fix off-by-one in nextInt() call 56781a1 [Josh Rosen] Rename UnsafeShuffleSorter to UnsafeShuffleInMemorySorter e995d1a [Josh Rosen] Introduce MAX_SHUFFLE_OUTPUT_PARTITIONS. e58a6b4 [Josh Rosen] Add more tests for PackedRecordPointer encoding. 4f0b770 [Josh Rosen] Attempt to implement proper shuffle write metrics. d4e6d89 [Josh Rosen] Update to bit shifting constants 69d5899 [Josh Rosen] Remove some unnecessary override vals 8531286 [Josh Rosen] Add tests that automatically trigger spills. 7c953f9 [Josh Rosen] Add test that covers UnsafeShuffleSortDataFormat.swap(). e1855e5 [Josh Rosen] Fix a handful of misc. IntelliJ inspections 39434f9 [Josh Rosen] Avoid integer multiplication overflow in getMemoryUsage (thanks FindBugs!) 1e3ad52 [Josh Rosen] Delete unused ByteBufferOutputStream class. ea4f85f [Josh Rosen] Roll back an unnecessary change in Spillable. ae538dc [Josh Rosen] Document UnsafeShuffleManager. ec6d626 [Josh Rosen] Add notes on maximum # of supported shuffle partitions. 0d4d199 [Josh Rosen] Bump up shuffle.memoryFraction to make tests pass. b3b1924 [Josh Rosen] Properly implement close() and flush() in DummySerializerInstance. 1ef56c7 [Josh Rosen] Revise compression codec support in merger; test cross product of configurations. b57c17f [Josh Rosen] Disable some overly-verbose logs that rendered DEBUG useless. f780fb1 [Josh Rosen] Add test demonstrating which compression codecs support concatenation. 4a01c45 [Josh Rosen] Remove unnecessary log message 27b18b0 [Josh Rosen] That for inserting records AT the max record size. fcd9a3c [Josh Rosen] Add notes + tests for maximum record / page sizes. 9d1ee7c [Josh Rosen] Fix MiMa excludes for ShuffleWriter change fd4bb9e [Josh Rosen] Use own ByteBufferOutputStream rather than Kryo's 67d25ba [Josh Rosen] Update Exchange operator's copying logic to account for new shuffle manager 8f5061a [Josh Rosen] Strengthen assertion to check partitioning 01afc74 [Josh Rosen] Actually read data in UnsafeShuffleWriterSuite 1929a74 [Josh Rosen] Update to reflect upstream ShuffleBlockManager -> ShuffleBlockResolver rename. e8718dd [Josh Rosen] Merge remote-tracking branch 'origin/master' into unsafe-sort 9b7ebed [Josh Rosen] More defensive programming RE: cleaning up spill files and memory after errors 7cd013b [Josh Rosen] Begin refactoring to enable proper tests for spilling. 722849b [Josh Rosen] Add workaround for transferTo() bug in merging code; refactor tests. 9883e30 [Josh Rosen] Merge remote-tracking branch 'origin/master' into unsafe-sort b95e642 [Josh Rosen] Refactor and document logic that decides when to spill. 1ce1300 [Josh Rosen] More minor cleanup 5e8cf75 [Josh Rosen] More minor cleanup e67f1ea [Josh Rosen] Remove upper type bound in ShuffleWriter interface. cfe0ec4 [Josh Rosen] Address a number of minor review comments: 8a6fe52 [Josh Rosen] Rename UnsafeShuffleSpillWriter to UnsafeShuffleExternalSorter 11feeb6 [Josh Rosen] Update TODOs related to shuffle write metrics. b674412 [Josh Rosen] Merge remote-tracking branch 'origin/master' into unsafe-sort aaea17b [Josh Rosen] Add comments to UnsafeShuffleSpillWriter. 4f70141 [Josh Rosen] Fix merging; now passes UnsafeShuffleSuite tests. 133c8c9 [Josh Rosen] WIP towards testing UnsafeShuffleWriter. f480fb2 [Josh Rosen] WIP in mega-refactoring towards shuffle-specific sort. 57f1ec0 [Josh Rosen] WIP towards packed record pointers for use in optimized shuffle sort. 69232fd [Josh Rosen] Enable compressible address encoding for off-heap mode. 7ee918e [Josh Rosen] Re-order imports in tests 3aeaff7 [Josh Rosen] More refactoring and cleanup; begin cleaning iterator interfaces 3490512 [Josh Rosen] Misc. cleanup f156a8f [Josh Rosen] Hacky metrics integration; refactor some interfaces. 2776aca [Josh Rosen] First passing test for ExternalSorter. 5e100b2 [Josh Rosen] Super-messy WIP on external sort 595923a [Josh Rosen] Remove some unused variables. 8958584 [Josh Rosen] Fix bug in calculating free space in current page. f17fa8f [Josh Rosen] Add missing newline c2fca17 [Josh Rosen] Small refactoring of SerializerPropertiesSuite to enable test re-use: b8a09fe [Josh Rosen] Back out accidental log4j.properties change bfc12d3 [Josh Rosen] Add tests for serializer relocation property. 240864c [Josh Rosen] Remove PrefixComputer and require prefix to be specified as part of insert() 1433b42 [Josh Rosen] Store record length as int instead of long. 026b497 [Josh Rosen] Re-use a buffer in UnsafeShuffleWriter 0748458 [Josh Rosen] Port UnsafeShuffleWriter to Java. 87e721b [Josh Rosen] Renaming and comments d3cc310 [Josh Rosen] Flag that SparkSqlSerializer2 supports relocation e2d96ca [Josh Rosen] Expand serializer API and use new function to help control when new UnsafeShuffle path is used. e267cee [Josh Rosen] Fix compilation of UnsafeSorterSuite 9c6cf58 [Josh Rosen] Refactor to use DiskBlockObjectWriter. 253f13e [Josh Rosen] More cleanup 8e3ec20 [Josh Rosen] Begin code cleanup. 4d2f5e1 [Josh Rosen] WIP 3db12de [Josh Rosen] Minor simplification and sanity checks in UnsafeSorter 767d3ca [Josh Rosen] Fix invalid range in UnsafeSorter. e900152 [Josh Rosen] Add test for empty iterator in UnsafeSorter 57a4ea0 [Josh Rosen] Make initialSize configurable in UnsafeSorter abf7bfe [Josh Rosen] Add basic test case. 81d52c5 [Josh Rosen] WIP on UnsafeSorter
* [SPARK-7356] [STREAMING] Fix flakey tests in FlumePollingStreamSuite using ↵Hari Shreedharan2015-05-131-59/+51
| | | | | | | | | | | | | SparkSink's batch CountDownLatch. This is meant to make the FlumePollingStreamSuite deterministic. Now we basically count the number of batches that have been completed - and then verify the results rather than sleeping for random periods of time. Author: Hari Shreedharan <hshreedharan@apache.org> Closes #5918 from harishreedharan/flume-test-fix and squashes the following commits: 93f24f3 [Hari Shreedharan] Add an eventually block to ensure that all received data is processed. Refactor the dstream creation and remove redundant code. 1108804 [Hari Shreedharan] [SPARK-7356][STREAMING] Fix flakey tests in FlumePollingStreamSuite using SparkSink's batch CountDownLatch.
* [STREAMING] [MINOR] Keep streaming.UIUtils privateAndrew Or2015-05-131-1/+1
| | | | | | | | | | zsxwing Author: Andrew Or <andrew@databricks.com> Closes #6134 from andrewor14/private-streaming-uiutils and squashes the following commits: 225df94 [Andrew Or] Privatize class
* [SPARK-7502] DAG visualization: gracefully handle removed stagesAndrew Or2015-05-133-8/+25
| | | | | | | | | | | | | | | | | | Old stages are removed without much feedback to the user. This happens very often in streaming. See screenshots below for more detail. zsxwing **Before** <img src="https://cloud.githubusercontent.com/assets/2133137/7621031/643cc1e0-f978-11e4-8f42-09decaac44a7.png" width="500px"/> ------------------------- **After** <img src="https://cloud.githubusercontent.com/assets/2133137/7621037/6e37348c-f978-11e4-84a5-e44e154f9b13.png" width="400px"/> Author: Andrew Or <andrew@databricks.com> Closes #6132 from andrewor14/dag-viz-remove-gracefully and squashes the following commits: 43175cd [Andrew Or] Handle removed jobs and stages gracefully
* [SPARK-7464] DAG visualization: highlight the same RDDs on hoverAndrew Or2015-05-133-16/+37
| | | | | | | | | | | | | This is pretty useful for MLlib. <img src="https://cloud.githubusercontent.com/assets/2133137/7599650/c7d03dd8-f8b8-11e4-8c0a-0a89e786c90f.png" width="400px"/> Author: Andrew Or <andrew@databricks.com> Closes #6100 from andrewor14/dag-viz-hover and squashes the following commits: fefe2af [Andrew Or] Link tooltips for nodes that belong to the same RDD 90c6a7e [Andrew Or] Assign classes to clusters and nodes, not IDs
* [SPARK-7399] Spark compilation error for scala 2.11Andrew Or2015-05-133-12/+14
| | | | | | | | | | Subsequent fix following #5966. I tried this out locally. Author: Andrew Or <andrew@databricks.com> Closes #6129 from andrewor14/211-compilation and squashes the following commits: 713868f [Andrew Or] Fix compilation issue for scala 2.11
* [SPARK-7608] Clean up old state in RDDOperationGraphListenerAndrew Or2015-05-132-9/+108
| | | | | | | | | | | This is necessary for streaming and long-running Spark applications. zsxwing tdas Author: Andrew Or <andrew@databricks.com> Closes #6125 from andrewor14/viz-listener-leak and squashes the following commits: 8660949 [Andrew Or] Fix thing + add tests 33c0843 [Andrew Or] Clean up old job state
* [SQL] Move some classes into packages that are more appropriate.Reynold Xin2015-05-1324-57/+80
| | | | | | | | | | | | | | | | JavaTypeInference into catalyst types.DateUtils into catalyst CacheManager into execution DefaultParserDialect into catalyst Author: Reynold Xin <rxin@databricks.com> Closes #6108 from rxin/sql-rename and squashes the following commits: 3fc9613 [Reynold Xin] Fixed import ordering. 83d9ff4 [Reynold Xin] Fixed codegen tests. e271e86 [Reynold Xin] mima f4e24a6 [Reynold Xin] [SQL] Move some classes into packages that are more appropriate.
* [SPARK-7303] [SQL] push down project if possible when the child is sortscwf2015-05-132-1/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Optimize the case of `project(_, sort)` , a example is: `select key from (select * from testData order by key) t` before this PR: ``` == Parsed Logical Plan == 'Project ['key] 'Subquery t 'Sort ['key ASC], true 'Project [*] 'UnresolvedRelation [testData], None == Analyzed Logical Plan == Project [key#0] Subquery t Sort [key#0 ASC], true Project [key#0,value#1] Subquery testData LogicalRDD [key#0,value#1], MapPartitionsRDD[1] == Optimized Logical Plan == Project [key#0] Sort [key#0 ASC], true LogicalRDD [key#0,value#1], MapPartitionsRDD[1] == Physical Plan == Project [key#0] Sort [key#0 ASC], true Exchange (RangePartitioning [key#0 ASC], 5), [] PhysicalRDD [key#0,value#1], MapPartitionsRDD[1] ``` after this PR ``` == Parsed Logical Plan == 'Project ['key] 'Subquery t 'Sort ['key ASC], true 'Project [*] 'UnresolvedRelation [testData], None == Analyzed Logical Plan == Project [key#0] Subquery t Sort [key#0 ASC], true Project [key#0,value#1] Subquery testData LogicalRDD [key#0,value#1], MapPartitionsRDD[1] == Optimized Logical Plan == Sort [key#0 ASC], true Project [key#0] LogicalRDD [key#0,value#1], MapPartitionsRDD[1] == Physical Plan == Sort [key#0 ASC], true Exchange (RangePartitioning [key#0 ASC], 5), [] Project [key#0] PhysicalRDD [key#0,value#1], MapPartitionsRDD[1] ``` with this rule we will first do column pruning on the table and then do sorting. Author: scwf <wangfei1@huawei.com> This patch had conflicts when merged, resolved by Committer: Michael Armbrust <michael@databricks.com> Closes #5838 from scwf/pruning and squashes the following commits: b00d833 [scwf] address michael's comment e230155 [scwf] fix tests failure b09b895 [scwf] improve column pruning
* [SPARK-7382] [MLLIB] Feature Parity in PySpark for ml.classificationBurak Yavuz2015-05-133-10/+501
| | | | | | | | | | | | | The missing pieces in ml.classification for Python! cc mengxr Author: Burak Yavuz <brkyvz@gmail.com> Closes #6106 from brkyvz/ml-class and squashes the following commits: dd78237 [Burak Yavuz] fix style 1048e29 [Burak Yavuz] ready for PR
* [SPARK-7545] [MLLIB] Added check in Bernoulli Naive Bayes to make sure that ↵leahmcguire2015-05-132-3/+58
| | | | | | | | | | | | | | | | | | | | both training and predict features have values of 0 or 1 Author: leahmcguire <lmcguire@salesforce.com> Closes #6073 from leahmcguire/binaryCheckNB and squashes the following commits: b8442c2 [leahmcguire] changed to if else for value checks 911bf83 [leahmcguire] undid reformat 4eedf1e [leahmcguire] moved bernoulli check 9ee9e84 [leahmcguire] fixed style error 3f3b32c [leahmcguire] fixed zero one check so only called in combiner 831fd27 [leahmcguire] got test working f44bb3c [leahmcguire] removed changes from CV branch 67253f0 [leahmcguire] added check to bernoulli to ensure feature values are zero or one f191c71 [leahmcguire] fixed name 58d060b [leahmcguire] changed param name and test according to comments 04f0d3c [leahmcguire] Added stats from cross validation as a val in the cross validation model to save them for user access
* [SPARK-7593] [ML] Python Api for ml.feature.BucketizerBurak Yavuz2015-05-133-2/+92
| | | | | | | | | | | | | Added `ml.feature.Bucketizer` to PySpark. cc mengxr Author: Burak Yavuz <brkyvz@gmail.com> Closes #6124 from brkyvz/ml-bucket and squashes the following commits: 05285be [Burak Yavuz] added sphinx doc 6abb6ed [Burak Yavuz] added support for Bucketizer
* [MINOR] [CORE] Accept alternative mesos unsatisfied link error in test.Tim Ellison2015-05-131-1/+1
| | | | | | | | | | | | | The IBM JVM reports an failed library load with a slightly different error message to Oracle's JVM. Update the test case to allow for either form. Author: Tim Ellison <tellison@users.noreply.github.com> Author: Tim Ellison <t.p.ellison@gmail.com> Closes #6119 from tellison/LibraryLoading and squashes the following commits: 2c5cd4e [Tim Ellison] Reduce assertion to check for the mesos library name f48c194 [Tim Ellison] Split long line b1079d7 [Tim Ellison] [MINOR] [CORE] Accept alternative mesos unsatisfied link error in test.
* [MINOR] Enhance SizeEstimator to detect IBM compressed refs and s390 …Tim Ellison2015-05-132-1/+19
| | | | | | | | | | | | | | | …arch. - zSeries 64-bit Java reports its architecture as s390x, so enhance the 64-bit check to accommodate that value. - SizeEstimator can detect whether IBM Java is using compressed object pointers using info in the "java.vm.info" property, so will do a better job than failing on the HotSpot MBean and guessing. Author: Tim Ellison <t.p.ellison@gmail.com> Closes #6085 from tellison/SizeEstimator and squashes the following commits: 1b6ff6a [Tim Ellison] Merge branch 'master' of https://github.com/apache/spark into SizeEstimator 0968989 [Tim Ellison] [MINOR] Enhance SizeEstimator to detect IBM compressed refs and s390 arch.
* [MINOR] Avoid passing the PermGenSize option to IBM JVMs.Tim Ellison2015-05-132-1/+24
| | | | | | | | | | | | | | IBM's Java VM doesn't have the concept of a permgen, so this option shouldn't be passed when the vendor property shows it is an IBM JDK. Author: Tim Ellison <t.p.ellison@gmail.com> Author: Tim Ellison <tellison@users.noreply.github.com> Closes #6055 from tellison/MaxPermSize and squashes the following commits: 3a0fb66 [Tim Ellison] Convert tabs back to spaces 6ad4266 [Tim Ellison] Remove unnecessary else clauses to reduce nesting. d27174b [Tim Ellison] Merge branch 'master' of https://github.com/apache/spark into MaxPermSize 42a8c3f [Tim Ellison] [MINOR] Avoid passing the PermGenSize option to IBM JVMs.
* [SPARK-7551][DataFrame] support backticks for DataFrame attribute resolutionWenchen Fan2015-05-133-4/+82
| | | | | | | | | | | Author: Wenchen Fan <cloud0fan@outlook.com> Closes #6074 from cloud-fan/7551 and squashes the following commits: e6f579e [Wenchen Fan] allow space 2b86699 [Wenchen Fan] handle blank e218d99 [Wenchen Fan] address comments 54c4209 [Wenchen Fan] fix 7551
* [SPARK-7567] [SQL] Migrating Parquet data source to FSBasedRelationCheng Lian2015-05-1316-1090/+926
| | | | | | | | | | | | | | | | | | | | | | | | | This PR migrates Parquet data source to the newly introduced `FSBasedRelation`. `FSBasedParquetRelation` is created to replace `ParquetRelation2`. Major differences are: 1. Partition discovery code has been factored out to `FSBasedRelation` 1. `AppendingParquetOutputFormat` is not used now. Instead, an anonymous subclass of `ParquetOutputFormat` is used to handle appending and writing dynamic partitions 1. When scanning partitioned tables, `FSBasedParquetRelation.buildScan` only builds an `RDD[Row]` for a single selected partition 1. `FSBasedParquetRelation` doesn't rely on Catalyst expressions for filter push down, thus it doesn't extend `CatalystScan` anymore After migrating `JSONRelation` (which extends `CatalystScan`), we can remove `CatalystScan`. <!-- Reviewable:start --> [<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/apache/spark/6090) <!-- Reviewable:end --> Author: Cheng Lian <lian@databricks.com> Closes #6090 from liancheng/parquet-migration and squashes the following commits: 6063f87 [Cheng Lian] Casts to OutputCommitter rather than FileOutputCommtter bfd1cf0 [Cheng Lian] Fixes compilation error introduced while rebasing f9ea56e [Cheng Lian] Adds ParquetRelation2 related classes to MiMa check whitelist 261d8c1 [Cheng Lian] Minor bug fix and more tests db65660 [Cheng Lian] Migrates Parquet data source to FSBasedRelation
* [SPARK-7589] [STREAMING] [WEBUI] Make "Input Rate" in the Streaming page ↵zsxwing2015-05-133-19/+30
| | | | | | | | | | | | | | | consistent with other pages This PR makes "Input Rate" in the Streaming page consistent with Job and Stage pages. ![screen shot 2015-05-12 at 5 03 35 pm](https://cloud.githubusercontent.com/assets/1000778/7601444/f943f8ac-f8ca-11e4-8280-a715d814f434.png) ![screen shot 2015-05-12 at 5 07 25 pm](https://cloud.githubusercontent.com/assets/1000778/7601445/f9571c0c-f8ca-11e4-9b12-9317cb55c002.png) Author: zsxwing <zsxwing@gmail.com> Closes #6102 from zsxwing/SPARK-7589 and squashes the following commits: 2745225 [zsxwing] Make "Input Rate" in the Streaming page consistent with other pages
* [SPARK-6734] [SQL] Add UDTF.close support in GenerateCheng Hao2015-05-147-13/+74
| | | | | | | | | | | | Some third-party UDTF extensions generate additional rows in the "GenericUDTF.close()" method, which is supported / documented by Hive. https://cwiki.apache.org/confluence/display/Hive/DeveloperGuide+UDTF However, Spark SQL ignores the "GenericUDTF.close()", and it causes bug while porting job from Hive to Spark SQL. Author: Cheng Hao <hao.cheng@intel.com> Closes #5383 from chenghao-intel/udtf_close and squashes the following commits: 98b4e4b [Cheng Hao] Support UDTF.close
* [MINOR] [SQL] Removes debugging printlnCheng Lian2015-05-131-2/+0
| | | | | | | | Author: Cheng Lian <lian@databricks.com> Closes #6123 from liancheng/remove-println and squashes the following commits: 03356b6 [Cheng Lian] Removes debugging println
* [SQL] In InsertIntoFSBasedRelation.insert, log cause before abort job/task.Yin Huai2015-05-131-0/+2
| | | | | | | | | | | | We need to add a log entry before calling `abortTask`/`abortJob`. Otherwise, an exception from `abortTask`/`abortJob` will shadow the real cause. cc liancheng Author: Yin Huai <yhuai@databricks.com> Closes #6105 from yhuai/logCause and squashes the following commits: 8dfe0d8 [Yin Huai] Log cause.
* [SPARK-7599] [SQL] Don't restrict customized output committers to be ↵Cheng Lian2015-05-131-8/+12
| | | | | | | | | | subclasses of FileOutputCommitter Author: Cheng Lian <lian@databricks.com> Closes #6118 from liancheng/spark-7599 and squashes the following commits: 31e1bd6 [Cheng Lian] Don't restrict customized output committers to be subclasses of FileOutputCommitter
* [SPARK-6568] spark-shell.cmd --jars option does not accept the jar that has ↵Masayoshi TSUZUKI2015-05-135-80/+89
| | | | | | | | | | | | | | | | | | | | | | | | | space in its path escape spaces in the arguments. Author: Masayoshi TSUZUKI <tsudukim@oss.nttdata.co.jp> Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp> Closes #5447 from tsudukim/feature/SPARK-6568-2 and squashes the following commits: 3f9a188 [Masayoshi TSUZUKI] modified some errors. ed46047 [Masayoshi TSUZUKI] avoid scalastyle errors. 1784239 [Masayoshi TSUZUKI] removed Utils.formatPath. e03f289 [Masayoshi TSUZUKI] removed testWindows from Utils.resolveURI and Utils.resolveURIs. replaced SystemUtils.IS_OS_WINDOWS to Utils.isWindows. removed Utils.formatPath from PythonRunner.scala. 84c33d0 [Masayoshi TSUZUKI] - use resolveURI in nonLocalPaths - run tests for Windows path only on Windows 016128d [Masayoshi TSUZUKI] fixed to use File.toURI() 2c62e3b [Masayoshi TSUZUKI] Merge pull request #1 from sarutak/SPARK-6568-2 7019a8a [Masayoshi TSUZUKI] Merge branch 'master' of https://github.com/apache/spark into feature/SPARK-6568-2 45946ee [Kousuke Saruta] Merge branch 'master' of git://git.apache.org/spark into SPARK-6568-2 10f1c73 [Kousuke Saruta] Added a comment 93c3c40 [Kousuke Saruta] Merge branch 'classpath-handling-fix' of github.com:sarutak/spark into SPARK-6568-2 649da82 [Kousuke Saruta] Fix classpath handling c7ba6a7 [Masayoshi TSUZUKI] [SPARK-6568] spark-shell.cmd --jars option does not accept the jar that has space in its path
* [SPARK-7526] [SPARKR] Specify ip of RBackend, MonitorServer and RRDD Socket ↵linweizhong2015-05-122-6/+6
| | | | | | | | | | | | server These R process only used to communicate with JVM process on local, so binding to localhost is more reasonable then wildcard ip. Author: linweizhong <linweizhong@huawei.com> Closes #6053 from Sephiroth-Lin/spark-7526 and squashes the following commits: 5303af7 [linweizhong] bind to localhost rather than wildcard ip
* [SPARK-7482] [SPARKR] Rename some DataFrame API methods in SparkR to match ↵Sun Rui2015-05-126-49/+71
| | | | | | | | | | | | their counterparts in Scala. Author: Sun Rui <rui.sun@intel.com> Closes #6007 from sun-rui/SPARK-7482 and squashes the following commits: 5c5cf5e [Sun Rui] Implement alias loadDF() as a new function. 3a30c10 [Sun Rui] Rename load()/save() to read.df()/write.df(). Also add loadDF()/saveDF() as aliases. 9f569d6 [Sun Rui] [SPARK-7482][SparkR] Rename some DataFrame API methods in SparkR to match their counterparts in Scala.
* [SPARK-7566][SQL] Add type to HiveContext.analyzerSantiago M. Mola2015-05-121-1/+1
| | | | | | | | | | This makes HiveContext.analyzer overrideable. Author: Santiago M. Mola <santi@mola.io> Closes #6086 from smola/patch-3 and squashes the following commits: 8ece136 [Santiago M. Mola] [SPARK-7566][SQL] Add type to HiveContext.analyzer
* [SPARK-7321][SQL] Add Column expression for conditional statements ↵Reynold Xin2015-05-126-2/+163
| | | | | | | | | | | | | | | | | | | | | | | | | (when/otherwise) This builds on https://github.com/apache/spark/pull/5932 and should close https://github.com/apache/spark/pull/5932 as well. As an example: ```python df.select(when(df['age'] == 2, 3).otherwise(4).alias("age")).collect() ``` Author: Reynold Xin <rxin@databricks.com> Author: kaka1992 <kaka_1992@163.com> Closes #6072 from rxin/when-expr and squashes the following commits: 8f49201 [Reynold Xin] Throw exception if otherwise is applied twice. 0455eda [Reynold Xin] Reset run-tests. bfb9d9f [Reynold Xin] Updated documentation and test cases. 762f6a5 [Reynold Xin] Merge pull request #5932 from kaka1992/IFCASE 95724c6 [kaka1992] Update 8218d0a [kaka1992] Update 801009e [kaka1992] Update 76d6346 [kaka1992] [SPARK-7321][SQL] Add Column expression for conditional statements (if, case)
* [SPARK-7588] Document all SQL/DataFrame public methods with @since tagReynold Xin2015-05-1217-26/+706
| | | | | | | | | | This pull request adds since tag to all public methods/classes in SQL/DataFrame to indicate which version the methods/classes were first added. Author: Reynold Xin <rxin@databricks.com> Closes #6101 from rxin/tbc and squashes the following commits: ed55e11 [Reynold Xin] Add since version to all DataFrame methods.
* [SPARK-7592] Always set resolution to "Fixed" in PR merge script.Patrick Wendell2015-05-121-1/+4
| | | | | | | | | | | | | | | | | The issue is that the behavior of the ASF JIRA silently changed. Now when the "Resolve Issue" transition occurs, the default resolution is "Pending Closed". We used to count on the default behavior being to set the resolution as "Fixed". The solution is to explicitly set the resolution as "Fixed" and not count on default behavior. Author: Patrick Wendell <patrick@databricks.com> Closes #6103 from pwendell/merge-script-fix and squashes the following commits: dcc16a6 [Patrick Wendell] Always set resolution to "Fixed" in PR merge script.
* [HOTFIX] Use the old Job API to support old Hadoop versionszsxwing2015-05-131-1/+1
| | | | | | | | | | | | #5526 uses `Job.getInstance`, which does not exist in the old Hadoop versions. Just use `new Job` to replace it. cc liancheng Author: zsxwing <zsxwing@gmail.com> Closes #6095 from zsxwing/hotfix and squashes the following commits: b0c2049 [zsxwing] Use the old Job API to support old Hadoop versions
* [SPARK-7572] [MLLIB] do not import Param/Params under pyspark.mlXiangrui Meng2015-05-123-7/+11
| | | | | | | | | | Remove `Param` and `Params` from `pyspark.ml` and add a section in the doc. brkyvz Author: Xiangrui Meng <meng@databricks.com> Closes #6094 from mengxr/SPARK-7572 and squashes the following commits: 022abd6 [Xiangrui Meng] do not import Param/Params under spark.ml
* [SPARK-7554] [STREAMING] Throw exception when an active/stopped ↵Tathagata Das2015-05-123-3/+59
| | | | | | | | | | StreamingContext is used to create DStreams and output operations Author: Tathagata Das <tathagata.das1565@gmail.com> Closes #6099 from tdas/SPARK-7554 and squashes the following commits: 2cd4158 [Tathagata Das] Throw exceptions on attempts to add stuff to active and stopped contexts.
* [SPARK-7528] [MLLIB] make RankingMetrics Java-friendlyXiangrui Meng2015-05-122-4/+87
| | | | | | | | | | `RankingMetrics` contains a ClassTag, which is hard to create in Java. This PR adds a factory method `of` for Java users. coderxiang Author: Xiangrui Meng <meng@databricks.com> Closes #6098 from mengxr/SPARK-7528 and squashes the following commits: e5d57ae [Xiangrui Meng] make RankingMetrics Java-friendly
* [SPARK-7553] [STREAMING] Added methods to maintain a singleton StreamingContextTathagata Das2015-05-122-11/+202
| | | | | | | | | | | | | | | | | | | | | | | | | In a REPL/notebook environment, its very easy to lose a reference to a StreamingContext by overriding the variable name. So if you happen to execute the following commands ``` val ssc = new StreamingContext(...) // cmd 1 ssc.start() // cmd 2 ... val ssc = new StreamingContext(...) // accidentally run cmd 1 again ``` The value of ssc will be overwritten. Now you can neither start the new context (as only one context can be started), nor stop the previous context (as the reference is lost). Hence its best to maintain a singleton reference to the active context, so that we never loose reference for the active context. Since this problem occurs useful in REPL environments, its best to add this as an Experimental support in the Scala API only so that it can be used in Scala REPLs and notebooks. Author: Tathagata Das <tathagata.das1565@gmail.com> Closes #6070 from tdas/SPARK-7553 and squashes the following commits: 731c9a1 [Tathagata Das] Fixed style a797171 [Tathagata Das] Added more unit tests 19fc70b [Tathagata Das] Added :: Experimental :: in docs 64706c9 [Tathagata Das] Fixed test 634db5d [Tathagata Das] Merge remote-tracking branch 'apache-github/master' into SPARK-7553 3884a25 [Tathagata Das] Fixing test bug d37a846 [Tathagata Das] Added getActive and getActiveOrCreate
* [SPARK-7573] [ML] OneVsRest cleanupsJoseph K. Bradley2015-05-123-31/+23
| | | | | | | | | | | | | | | | | | Minor cleanups discussed with [~mengxr]: * move OneVsRest from reduction to classification sub-package * make model constructor private Some doc cleanups too CC: harsha2010 Could you please verify this looks OK? Thanks! Author: Joseph K. Bradley <joseph@databricks.com> Closes #6097 from jkbradley/onevsrest-cleanup and squashes the following commits: 4ecd48d [Joseph K. Bradley] org imports 430b065 [Joseph K. Bradley] moved OneVsRest from reduction subpackage to classification. small java doc style fixes 9f8b9b9 [Joseph K. Bradley] Small cleanups to OneVsRest. Made model constructor private to ml package.
* [SPARK-7557] [ML] [DOC] User guide for spark.ml HashingTF, TokenizerJoseph K. Bradley2015-05-123-0/+278
| | | | | | | | | | | | | | | | | | Added feature transformer subsection to spark.ml guide, with HashingTF and Tokenizer. Added JavaHashingTFSuite to test Java examples in new guide. I've run Scala, Python examples in the Spark/PySpark shells. I ran the Java examples via the test suite (with small modifications for printing). CC: mengxr Author: Joseph K. Bradley <joseph@databricks.com> Closes #6093 from jkbradley/hashingtf-guide and squashes the following commits: d5d213f [Joseph K. Bradley] small fix dd6e91a [Joseph K. Bradley] fixes from code review of user guide 33c3ff9 [Joseph K. Bradley] small fix bc6058c [Joseph K. Bradley] fix link 361a174 [Joseph K. Bradley] Added subsection for feature transformers to spark.ml guide, with HashingTF and Tokenizer. Added JavaHashingTFSuite to test Java examples in new guide
* [SPARK-7496] [MLLIB] Update Programming guide with Online LDAYuhao Yang2015-05-121-3/+3
| | | | | | | | | | | | | jira: https://issues.apache.org/jira/browse/SPARK-7496 Update LDA subsection of clustering section of MLlib programming guide to include OnlineLDA. Author: Yuhao Yang <hhbyyh@gmail.com> Closes #6046 from hhbyyh/ldaDocument and squashes the following commits: 4b6fbfa [Yuhao Yang] add online paper and some comparison fd4c983 [Yuhao Yang] update lda document for optimizers
* [SPARK-7406] [STREAMING] [WEBUI] Add tooltips for "Scheduling Delay", ↵zsxwing2015-05-124-14/+21
| | | | | | | | | | | | | | | | | | | "Processing Time" and "Total Delay" Screenshots: ![screen shot 2015-05-06 at 2 29 03 pm](https://cloud.githubusercontent.com/assets/1000778/7504129/9c57f710-f3fc-11e4-9c6e-1b79c17c546d.png) ![screen shot 2015-05-06 at 2 24 35 pm](https://cloud.githubusercontent.com/assets/1000778/7504140/b63bb216-f3fc-11e4-83a5-6dfc6481d192.png) tdas as we discussed offline Author: zsxwing <zsxwing@gmail.com> Closes #5952 from zsxwing/SPARK-7406 and squashes the following commits: 2b004ea [zsxwing] Merge branch 'master' into SPARK-7406 e9eb506 [zsxwing] Update tooltip contents 2215b2a [zsxwing] Add tooltips for "Scheduling Delay", "Processing Time" and "Total Delay"
* [SPARK-7571] [MLLIB] rename Math to mathXiangrui Meng2015-05-129-15/+15
| | | | | | | | | | `scala.Math` is deprecated since 2.8. This PR only touchs `Math` usages in MLlib. dbtsai Author: Xiangrui Meng <meng@databricks.com> Closes #6092 from mengxr/SPARK-7571 and squashes the following commits: fe8f8d3 [Xiangrui Meng] Math -> math
* [SPARK-7484][SQL]Support jdbc connection propertiesVenkata Ramana Gollamudi2015-05-124-31/+148
| | | | | | | | | | | | | | Few jdbc drivers like SybaseIQ support passing username and password only through connection properties. So the same needs to be supported for SQLContext.jdbc, dataframe.createJDBCTable and dataframe.insertIntoJDBC. Added as default arguments or overrided function to support backward compatability. Author: Venkata Ramana Gollamudi <ramana.gollamudi@huawei.com> Closes #6009 from gvramana/add_jdbc_conn_properties and squashes the following commits: 396a0d0 [Venkata Ramana Gollamudi] fixed comments d66dd8c [Venkata Ramana Gollamudi] fixed comments 1b8cd8c [Venkata Ramana Gollamudi] Support jdbc connection properties
* [SPARK-7559] [MLLIB] Bucketizer should include the right most boundary in ↵Xiangrui Meng2015-05-122-39/+41
| | | | | | | | | | | | | | | | the last bucket. We make special treatment for +inf in `Bucketizer`. This could be simplified by always including the largest split value in the last bucket. E.g., (x1, x2, x3) defines buckets [x1, x2) and [x2, x3]. This shouldn't affect user code much, and there are applications that need to include the right-most value. For example, we can bucketize ratings from 0 to 10 to bad, neutral, and good with splits 0, 4, 6, 10. It may reads weird if the users need to put 0, 4, 6, 10.1 (or 11). This also update the impl to use `Arrays.binarySearch` and `withClue` in test. yinxusen jkbradley Author: Xiangrui Meng <meng@databricks.com> Closes #6075 from mengxr/SPARK-7559 and squashes the following commits: e28f910 [Xiangrui Meng] update bucketizer impl
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