Commit Graph

177 Commits

Author SHA1 Message Date
Jonathan Wei 2bf6fc353a Update scan benchmark for time ordering (#7385) 2019-03-30 11:36:25 -07:00
Justin Borromeo ad7862c58a Time Ordering On Scans (#7133)
* Moved Scan Builder to Druids class and started on Scan Benchmark setup

* Need to form queries

* It runs.

* Stuff for time-ordered scan query

* Move ScanResultValue timestamp comparator to a separate class for testing

* Licensing stuff

* Change benchmark

* Remove todos

* Added TimestampComparator tests

* Change number of benchmark iterations

* Added time ordering to the scan benchmark

* Changed benchmark params

* More param changes

* Benchmark param change

* Made Jon's changes and removed TODOs

* Broke some long lines into two lines

* nit

* Decrease segment size for less memory usage

* Wrote tests for heapsort scan result values and fixed bug where iterator
wasn't returning elements in correct order

* Wrote more tests for scan result value sort

* Committing a param change to kick teamcity

* Fixed codestyle and forbidden API errors

* .

* Improved conciseness

* nit

* Created an error message for when someone tries to time order a result
set > threshold limit

* Set to spaces over tabs

* Fixing tests WIP

* Fixed failing calcite tests

* Kicking travis with change to benchmark param

* added all query types to scan benchmark

* Fixed benchmark queries

* Renamed sort function

* Added javadoc on ScanResultValueTimestampComparator

* Unused import

* Added more javadoc

* improved doc

* Removed unused import to satisfy PMD check

* Small changes

* Changes based on Gian's comments

* Fixed failing test due to null resultFormat

* Added config and get # of segments

* Set up time ordering strategy decision tree

* Refactor and pQueue works

* Cleanup

* Ordering is correct on n-way merge -> still need to batch events into
ScanResultValues

* WIP

* Sequence stuff is so dirty :(

* Fixed bug introduced by replacing deque with list

* Wrote docs

* Multi-historical setup works

* WIP

* Change so batching only occurs on broker for time-ordered scans

Restricted batching to broker for time-ordered queries and adjusted
tests

Formatting

Cleanup

* Fixed mistakes in merge

* Fixed failing tests

* Reset config

* Wrote tests and added Javadoc

* Nit-change on javadoc

* Checkstyle fix

* Improved test and appeased TeamCity

* Sorry, checkstyle

* Applied Jon's recommended changes

* Checkstyle fix

* Optimization

* Fixed tests

* Updated error message

* Added error message for UOE

* Renaming

* Finish rename

* Smarter limiting for pQueue method

* Optimized n-way merge strategy

* Rename segment limit -> segment partitions limit

* Added a bit of docs

* More comments

* Fix checkstyle and test

* Nit comment

* Fixed failing tests -> allow usage of all types of segment spec

* Fixed failing tests -> allow usage of all types of segment spec

* Revert "Fixed failing tests -> allow usage of all types of segment spec"

This reverts commit ec470288c7.

* Revert "Merge branch '6088-Time-Ordering-On-Scans-N-Way-Merge' of github.com:justinborromeo/incubator-druid into 6088-Time-Ordering-On-Scans-N-Way-Merge"

This reverts commit 57033f36df, reversing
changes made to 8f01d8dd16.

* Check type of segment spec before using for time ordering

* Fix bug in numRowsScanned

* Fix bug messing up count of rows

* Fix docs and flipped boolean in ScanQueryLimitRowIterator

* Refactor n-way merge

* Added test for n-way merge

* Refixed regression

* Checkstyle and doc update

* Modified sequence limit to accept longs and added test for long limits

* doc fix

* Implemented Clint's recommendations
2019-03-28 14:37:09 -07:00
Furkan KAMACI 7ada1c49f9 Prohibit Throwables.propagate() (#7121)
* Throw caught exception.

* Throw caught exceptions.

* Related checkstyle rule is added to prevent further bugs.

* RuntimeException() is used instead of Throwables.propagate().

* Missing import is added.

* Throwables are propogated if possible.

* Throwables are propogated if possible.

* Throwables are propogated if possible.

* Throwables are propogated if possible.

* * Checkstyle definition is improved.
* Throwables.propagate() usages are removed.

* Checkstyle pattern is changed for only scanning "Throwables.propagate(" instead of checking lookbehind.

* Throwable is kept before firing a Runtime Exception.

* Fix unused assignments.
2019-03-14 18:28:33 -03:00
Justin Borromeo 871b9d2f4c [Benchmarking] Call blackhole#consume() on collections instead of iterating through each element (#7002)
* Replaced iteration with blackhole#consume(the collection)

* Added javadoc on Sequence#toList()
2019-02-20 08:48:06 -08:00
Jonathan Wei fafbc4a80e
Set version to 0.15.0-incubating-SNAPSHOT (#7014) 2019-02-07 14:02:52 -08:00
Justin Borromeo 6723243ed2 Create Scan Benchmark (#6986)
* Moved Scan Builder to Druids class and started on Scan Benchmark setup

* Need to form queries

* It runs.

* Remove todos

* Change number of benchmark iterations

* Changed benchmark params

* More param changes

* Made Jon's changes and removed TODOs

* Broke some long lines into two lines

* Decrease segment size for less memory usage

* Committing a param change to kick teamcity
2019-02-06 14:45:01 -08:00
Jonathan Wei 8bc5eaa908
Set version to 0.14.0-incubating-SNAPSHOT (#7003) 2019-02-04 19:36:20 -08:00
Roman Leventov 0e926e8652 Prohibit assigning concurrent maps into Map-typed variables and fields and fix a race condition in CoordinatorRuleManager (#6898)
* Prohibit assigning concurrent maps into Map-types variables and fields; Fix a race condition in CoordinatorRuleManager; improve logic in DirectDruidClient and ResourcePool

* Enforce that if compute(), computeIfAbsent(), computeIfPresent() or merge() is called on a ConcurrentHashMap, it's stored in a ConcurrentHashMap-typed variable, not ConcurrentMap; add comments explaining get()-before-computeIfAbsent() optimization; refactor Counters; fix a race condition in Intialization.java

* Remove unnecessary comment

* Checkstyle

* Fix getFromExtensions()

* Add a reference to the comment about guarded computeIfAbsent() optimization; IdentityHashMap optimization

* Fix UriCacheGeneratorTest

* Workaround issue with MaterializedViewQueryQueryToolChest

* Strengthen Appenderator's contract regarding concurrency
2019-02-04 09:18:12 -08:00
Surekha 7baa33049c Introduce published segment cache in broker (#6901)
* Add published segment cache in broker

* Change the DataSegment interner so it's not based on DataSEgment's equals only and size is preserved if set

* Added a trueEquals to DataSegment class

* Use separate interner for realtime and historical segments

* Remove trueEquals as it's not used anymore, change log message

* PR comments

* PR comments

* Fix tests

* PR comments

* Few more modification to

* change the coordinator api
* removeall segments at once from MetadataSegmentView in order to serve a more consistent view of published segments
* Change the poll behaviour to avoid multiple poll execution at same time

* minor changes

* PR comments

* PR comments

* Make the segment cache in broker off by default

* Added a config to PlannerConfig
* Moved MetadataSegmentView to sql module

* Add doc for new planner config

* Update documentation

* PR comments

* some more changes

* PR comments

* fix test

* remove unintentional change, whether to synchronize on lifecycleLock is still in discussion in PR

* minor changes

* some changes to initialization

* use pollPeriodInMS

* Add boolean cachePopulated to check if first poll succeeds

* Remove poll from start()

* take the log message out of condition in stop()
2019-02-02 22:27:13 -08:00
Roman Leventov f7df5fedcc Add several missing inspectRuntimeShape() calls (#6893)
* Add several missing inspectRuntimeShape() calls

* Add lgK to runtime shapes
2019-01-31 20:04:26 -08:00
Roman Leventov 8eae26fd4e Introduce SegmentId class (#6370)
* Introduce SegmentId class

* tmp

* Fix SelectQueryRunnerTest

* Fix indentation

* Fixes

* Remove Comparators.inverse() tests

* Refinements

* Fix tests

* Fix more tests

* Remove duplicate DataSegmentTest, fixes #6064

* SegmentDescriptor doc

* Fix SQLMetadataStorageUpdaterJobHandler

* Fix DataSegment deserialization for ignoring id

* Add comments

* More comments

* Address more comments

* Fix compilation

* Restore segment2 in SystemSchemaTest according to a comment

* Fix style

* fix testServerSegmentsTable

* Fix compilation

* Add comments about why SegmentId and SegmentIdWithShardSpec are separate classes

* Fix SystemSchemaTest

* Fix style

* Compare SegmentDescriptor with SegmentId in Javadoc and comments rather than with DataSegment

* Remove a link, see https://youtrack.jetbrains.com/issue/IDEA-205164

* Fix compilation
2019-01-21 11:11:10 -08:00
Jonathan Wei 68f744ec0a
Fixed buckets histogram aggregator (#6638)
* Fixed buckets histogram aggregator

* PR comments

* More PR comments

* Checkstyle

* TeamCity

* More TeamCity

* PR comment

* PR comment

* Fix doc formatting
2019-01-17 14:51:16 -08:00
Dayue Gao 5b8a221713 Add SQL id, request logs, and metrics (#6302)
* use SqlLifecyle to manage sql execution, add sqlId

* add sql request logger

* fix UT

* rename sqlId to sqlQueryId, sql/time to sqlQuery/time, etc

* add docs and more sql request logger impls

* add UT for http and jdbc

* fix forbidden use of com.google.common.base.Charsets

* fix UT in QuantileSqlAggregatorTest, supressed unused warning of getSqlQueryId

* do not use default method in QueryMetrics interface

* capitalize 'sql' everywhere in the non-property parts of the docs

* use RequestLogger interface to log sql query

* minor bugfixes and add switching request logger

* add filePattern configs for FileRequestLogger

* address review comments, adjust sql request log format

* fix inspection error

* try SuppressWarnings("RedundantThrows") to fix inspection error on ComposingRequestLoggerProvider
2019-01-15 23:12:59 -08:00
Jihoon Son c35a39d70b
Add support maxRowsPerSegment for auto compaction (#6780)
* Add support maxRowsPerSegment for auto compaction

* fix build

* fix build

* fix teamcity

* add test

* fix test

* address comment
2019-01-10 09:50:14 -08:00
Jihoon Son fa7cb906e4 Fix auto compaction to consider intervals of running tasks (#6767)
* Fix auto compaction to consider intervals of running tasks

* adjust initial collection size
2018-12-27 18:03:44 -08:00
Shimi Kiviti 5fae522f12 replace Files.map() with FileUtils.map() (#6692) 2018-11-30 07:40:41 -08:00
Roman Leventov 887c645675
Find duplicate lines with checkstyle; enable some duplicate inspections in IntelliJ (#6558)
Not putting this to 0.13 milestone because the found bugs are not critical (one is a harmless DI config duplicate, and another is in a benchmark.

Change in `DumpSegment` is just an indentation change.
2018-11-26 16:55:42 +01:00
Roman Leventov 87b96fb1fd
Add checkstyle rules about imports and empty lines between members (#6543)
* Add checkstyle rules about imports and empty lines between members

* Add suppressions

* Update Eclipse import order

* Add empty line

* Fix StatsDEmitter
2018-11-20 12:42:15 +01:00
Roman Leventov 8f3fe9cd02 Prohibit String.replace() and String.replaceAll(), fix and prohibit some toString()-related redundancies (#6607)
* Prohibit String.replace() and String.replaceAll(), fix and prohibit some toString()-related redundancies

* Fix bug

* Replace checkstyle regexp with IntelliJ inspection
2018-11-15 13:21:34 -08:00
Gian Merlino 52f6bdc1eb
Optimization for expressions that hit a single long column. (#6599)
* Optimization for expressions that hit a single long column.

There was previously a single-long-input optimization that applied only
to the time column. These have been combined together. Also adds
type-specific value caching to ExprEval, which allowed simplifying
the SingleLongInputCachingExpressionColumnValueSelector code.

* Add more benchmarks.

* Don't use LRU cache for __time.

* Simplify a bit.

* Let the cache grow.
2018-11-13 09:36:32 -08:00
Roman Leventov 54351a5c75 Fix various bugs; Enable more IntelliJ inspections and update error-prone (#6490)
* Fix various bugs; Enable more IntelliJ inspections and update error-prone

* Fix NPE

* Fix inspections

* Remove unused imports
2018-11-06 14:38:08 -08:00
QiuMM 676f5e6d7f Prohibit some guava collection APIs and use JDK collection APIs directly (#6511)
* Prohibit some guava collection APIs and use JDK APIs directly

* reset files that changed by accident

* sort codestyle/druid-forbidden-apis.txt alphabetically
2018-10-29 13:02:43 +01:00
Roman Leventov 84ac18dc1b
Catch some incorrect method parameter or call argument formatting patterns with checkstyle (#6461)
* Catch some incorrect method parameter or call argument formatting patterns with checkstyle

* Fix DiscoveryModule

* Inline parameters_and_arguments.txt

* Fix a bug in PolyBind

* Fix formatting
2018-10-23 07:17:38 -03:00
Diego Costa d5ccd582b5 Reducing the usage of Jmh Invocation level on setup (#6459)
* Reducing the usage of invocation level setup

* Removing LoadStatusBenchmark as it has no use in the codebase
2018-10-14 20:37:11 -07:00
David Lim 20ab213ba6 change project versions to 0.13.0-incubating-SNAPSHOT (#6453) 2018-10-11 19:28:01 -07:00
Surekha 3a0a667fe0 Introduce SystemSchema tables (#5989) (#6094)
* Added SystemSchema with following tables (#5989)

* SEGMENTS table provides details on served and published segments
* SERVERS table provides details on data servers
* SERVERSEGMETS table is the JOIN of SEGMENTS and SERVERS
* TASKS table provides details on tasks

* Add documentation for system schema

* Fix static-analysis warnings

* Address PR comments

*Add unit tests

* Fix a test

* Try to fix a test

* Fix a bug around replica count

* rename io.druid to org.apache.druid

* Major change is to make tasks and segment queries streaming

* Made tasks/segments stream to calcite instead of storing it in memory
* Add num_rows to segments table
* Refactor JsonParserIterator
* Replace with closeable iterator

* Fix docs, make num_rows column nullable, some unit test changes

* make num_rows column type long, allow it to be null

fix a compile error after merge, add TrafficCop param to InputStreamResponseHandler

* Filter null rows for segments table from Linq4j enumerable

* change num_replicas datatype to long in segments table

* Fix some tests and address comments

* Doc updates, other PR comments

* Update tests

* Address comments

* Add auth check
* Update docs
* Refactoring

* Fix teamcity warning, change the getQueryableServer in TimelineServerView

* Fix compilation after rebase

* Use the stream API from AuthorizationUtils

* Added LeaderClient interface and NoopDruidLeaderClient class

* Revert "Added LeaderClient interface and NoopDruidLeaderClient class"

This reverts commit 100fa46e39.

* Make the naming consistent to server_segments for the join table

* Add ForbiddenException on auth check failure
* Remove static block from SystemSchema

* Try to fix a test in CalciteQueryTest due to rename of server_segments

* Fix the json output format in the coordinator API

* Add auth check in the segments API
* Add null check to avoid NPE

* Use annonymous class object instead of mock for DruidLeaderClient in SqlBenchmark

* Fix test failures, type long/BIGINT can be nullable

* Revert long nullability to fix tests

* Fix style for tests

* PR comments

* Address PR comments

* Add the missing BytesAccumulatingResponseHandler class

* Use Sequences.withBaggage in DruidPlanner

* Fix docs, add comments

* Close the iterator if hasNext returns false
2018-10-10 17:17:29 -07:00
Jihoon Son 88d23b77b7 Add support keepSegmentGranularity for automatic compaction (#6407)
* Add support keepSegmentGranularity for automatic compaction

* skip unknown dataSource

* ignore single semgnet to compact

* add doc

* address comments

* address comment
2018-10-07 16:48:58 -07:00
Roman Leventov 3ae563263a
Renamed 'Generic Column' -> 'Numeric Column'; Fixed a few resource leaks in processing; misc refinements (#5957)
This PR accumulates many refactorings and small improvements that I did while preparing the next change set of https://github.com/druid-io/druid/projects/2. I finally decided to make them a separate PR to minimize the volume of the main PR.

Some of the changes:
 - Renamed confusing "Generic Column" term to "Numeric Column" (what it actually implies) in many class names.
 - Generified `ComplexMetricExtractor`
2018-10-02 14:50:22 -03:00
Jihoon Son cb14a43038 Remove ConvertSegmentTask, HadoopConverterTask, and ConvertSegmentBackwardsCompatibleTask (#6393)
* Remove ConvertSegmentTask, HadoopConverterTask, and ConvertSegmentBackwardsCompatibleTask

* update doc and remove auto conversion

* remove remaining doc

* fix teamcity
2018-10-01 12:03:35 -07:00
Roman Leventov 0c4bd2b57b Prohibit some Random usage patterns (#6226)
* Prohibit Random usage patterns

* Fix FlattenJSONBenchmarkUtil
2018-09-14 13:35:51 -07:00
Gian Merlino 431d3d8497
Rename io.druid to org.apache.druid. (#6266)
* Rename io.druid to org.apache.druid.

* Fix META-INF files and remove some benchmark results.

* MonitorsConfig update for metrics package migration.

* Reorder some dimensions in inner queries for some reason.

* Fix protobuf tests.
2018-08-30 09:56:26 -07:00
Gian Merlino cb40b6d369 Fix all inspection errors currently reported. (#6236)
* Fix all inspection errors currently reported.

TeamCity builds on master are reporting inspection errors, possibly
because there was a while where it was not running due to the Apache
migration, and there was some drift.

* Fix one more location.

* Fix tests.

* Another fix.
2018-08-26 18:36:01 -06:00
Jihoon Son ecee3e0a24 Further optimize memory for Travis jobs (#6150)
* Further optimize memory for Travis jobs

* fix build

* sudo false
2018-08-10 22:03:36 -07:00
Clint Wylie 62677212cc Order rows during incremental index persist when rollup is disabled. (#6107)
* order using IncrementalIndexRowComparator at persist time when rollup is disabled, allowing increased effectiveness of dimension compression, resolves #6066

* fix stuff from review
2018-08-06 14:17:48 -07:00
Nishant Bangarwa 75c8a87ce1 Part 2 of changes for SQL Compatible Null Handling (#5958)
* Part 2 of changes for SQL Compatible Null Handling

* Review comments - break lines longer than 120 characters

* review comments

* review comments

* fix license

* fix test failure

* fix CalciteQueryTest failure

* Null Handling - Review comments

* review comments

* review comments

* fix checkstyle

* fix checkstyle

* remove unrelated change

* fix test failure

* fix failing test

* fix travis failures

* Make StringLast and StringFirst aggregators nullable and fix travis failures
2018-08-02 08:20:25 -07:00
Jonathan Wei b9c445c780
Optimize filtered aggs with interval filters in per-segment queries (#5857)
* Optimize per-segment queries

* Always optimize, add unit test

* PR comments

* Only run IntervalDimFilter optimization on __time column

* PR comments

* Checkstyle fix

* Add test for non __time column
2018-08-01 14:39:38 -07:00
Roman Leventov 0754d78a2e Prohibit Lists.newArrayList() with a single argument (#6068)
* Prohibit Lists.newArrayList() with a single argument

* Test fixes

* Add Javadoc to Node constructor
2018-07-31 20:09:10 -07:00
Benedict Jin 331a0afb98 Remove redundant type parameters and enforce some other style and inspection rules (#5980)
* Various changes about druid-services module

* Patch improvements from reviewer

* Add ToArrayCallWithZeroLengthArrayArgument & ArraysAsListWithZeroOrOneArgument into inspection profile

* Fix ArraysAsListWithZeroOrOneArgument

* Fix conflict

* Fix ToArrayCallWithZeroLengthArrayArgument

* Fix AliEqualsAvoidNull

* Remove blank line

* Remove unused import clauses

* Fix code style in TopNQueryRunnerTest

* Fix conflict

* Don't use Collections.singletonList when converting the type of array type

* Add argLine into maven-surefire-plugin in druid-process module & increase the timeout value for testMoveSegment testcase

* Roll back the latest commit

* Add java.io.File#toURL() into druid-forbidden-apis

* Using Boolean.parseBoolean instead of Boolean.valueOf for CliCoordinator#isOverlord

* Add a new regexp element into stylecode xml file

* Fix style error for new regexp

* Set the level of ArraysAsListWithZeroOrOneArgument as WARNING

* Fix style error for new regexp

* Add option BY_LEVEL for ToArrayCallWithZeroLengthArrayArgument in inspection profile

* Roll back the level as ToArrayCallWithZeroLengthArrayArgument as ERROR

* Add toArray(new Object[0]) regexp into checkstyle config file & fix them

* Set the level of ArraysAsListWithZeroOrOneArgument as ERROR & Roll back the level of ToArrayCallWithZeroLengthArrayArgument as WARNING until Youtrack fix it

* Add a comment for string equals regexp in checkstyle config

* Fix code format

* Add RedundantTypeArguments as ERROR level inspection

* Fix cannot resolve symbol datasource
2018-07-27 16:56:49 -05:00
Diego Costa e4ef753a60 Use Blackhole objects to sink the method return in a benchmak loop (JMH) (#5908)
* Remove the unsafe loop from the benchmark

* Removing unused variables
2018-07-25 12:05:32 -07:00
Gian Merlino 04ea3c9f8c
Update license headers. (#5976)
* Update license headers.

For compliance with http://www.apache.org/legal/src-headers.html.

* More license adjustments.

* Fix mistakenly edited package line.
2018-07-11 09:55:18 -07:00
Gian Merlino 78fd27cdb2
Lazy-ify ValueMatcher BitSet optimization for string dimensions. (#5403)
* Lazy-ify ValueMatcher BitSet optimization for string dimensions.

The idea is that if the prior evaluated filters are decently selective,
such that they mean we won't see all possible values of the later
filters, then the eager version of the optimization is too wasteful.

This involves checking an extra bitset, but the overhead is small even
if the lazy-ification is useless.

* Remove import.

* Minor transformation
2018-06-05 09:06:51 -07:00
Roman Leventov 9be000758d Refactor index merging, replace Rowboats with RowIterators and RowPointers (#5335)
* Refactor index merging, replace Rowboats with RowIterators and RowPointers

* Add javadocs

* Fix a bug in QueryableIndexIndexableAdapter

* Fixes

* Remove unused declarations

* Remove unused GenericColumn.isNull() method

* Fix test

* Address comments

* Rearrange some code in MergingRowIterator for more clarity

* Self-review

* Fix style

* Improve docs

* Fix docs

* Rename IndexMergerV9.writeDimValueAndSetupDimConversion to setUpDimConversion()

* Update Javadocs

* Minor fixes

* Doc fixes, more code comments, cleanup of RowCombiningTimeAndDimsIterator

* Fix doc link
2018-04-27 17:34:32 -07:00
Jonathan Wei e91add6843
Fix coordinator loadStatus performance (#5632)
* Optimize coordinator loadStatus

* Add comment

* Fix teamcity

* Checkstyle

* More checkstyle

* Checkstyle
2018-04-12 15:07:52 -07:00
Jonathan Wei 969342cd28
More error reporting and stats for ingestion tasks (#5418)
* Add more indexing task status and error reporting

* PR comments, add support in AppenderatorDriverRealtimeIndexTask

* Use TaskReport instead of metrics/context

* Fix tests

* Use TaskReport uploads

* Refactor fire department metrics retrieval

* Refactor input row serde in hadoop task

* Refactor hadoop task loader names

* Truncate error message in TaskStatus, add errorMsg to task report

* PR comments
2018-04-05 21:38:57 -07:00
Roman Leventov 693e3575f9
Remove unused code and exception declarations (#5461)
* Remove unused code and exception declarations

* Address comments

* Remove redundant Exception declarations

* Make FirehoseFactoryV2.connect() to throw IOException again
2018-03-16 22:11:12 +01:00
Gian Merlino fdd55538e1 SQL: Remove unused escalator, authConfig from various classes. (#5483)
DruidPlanner.plan is responsible for checking authorization, so these objects
weren't needed in as many places as they were injected.
2018-03-14 13:28:51 -07:00
Roman Leventov 6b158abe3f Enforce optimal IndexedInts iteration (#5456)
* Enforce optimal IndexedInts iteration

* Fix remaining suboptimal usages
2018-03-09 09:42:40 -08:00
Jihoon Son 2099b43e5f Add a new config object for compactConfig (#5264)
* add a new config object for compactConfig

* fix test

* address comments

* Update doc
2018-02-06 12:13:52 -08:00
Gian Merlino 7e02408510 Update versions to 0.13.0-SNAPSHOT. (#5323) 2018-02-02 12:06:38 -06:00
Roman Leventov 87c744ac1d Add MethodParamPad, OneStatementPerLine and EmptyStatement Checkstyle checks (#5272) 2018-01-18 11:29:23 -08:00