Commit Graph

2221 Commits

Author SHA1 Message Date
Arun Suresh 384a84828f YARN-5180. Allow ResourceRequest to specify an enforceExecutionType flag. (asuresh)
(cherry picked from commit dc26601d8f)
2016-06-02 09:14:30 -07:00
Varun Vasudev 4f36c3d214 YARN-4844. Add getMemoryLong/getVirtualCoreLong to o.a.h.y.api.records.Resource. Contributed by Wangda Tan. 2016-05-29 20:55:39 +05:30
Carlo Curino c656977961 YARN-4957. Add getNewReservation in ApplicationClientProtocol (Sean Po via curino)
(cherry picked from commit 013532a95e)
2016-05-25 16:58:19 -07:00
Jian He 396d222d7a MAPREDUCE-6703. Add flag to allow MapReduce AM to request for OPPORTUNISTIC containers. Contributed by Arun Suresh
(cherry picked from commit ae353ea969)
2016-05-24 19:48:11 -07:00
Akira Ajisaka a59f30272d MAPREDUCE-6607. Enable regex pattern matching when mapreduce.task.files.preserve.filepattern is set. Contributed by Kai Sasaki. 2016-05-23 07:25:52 +09:00
Jian He db3cf5b354 MAPREDUCE-6696. Add a configuration to limit the number of map tasks allowed per job. Contributed by Zhihai Xu
(cherry picked from commit 21d2b90213)
2016-05-19 19:25:48 -07:00
Junping Du 2703ec6871 YARN-5076. YARN web interfaces lack XFS protection. Contributed by Jonathan Maron. 2016-05-19 14:10:15 -07:00
Robert Kanter 27aabcab45 MAPREDUCE-6686. Add a way to download the job config from the mapred CLI (rkanter)
(cherry picked from commit 992a49353f)
2016-05-18 12:16:45 -07:00
Junping Du 7e36b9159e MAPREDUCE-6657. Job history server can fail on startup when NameNode is in start phase. Contributed by Haibo Chen.
(cherry picked from commit f6ef876fe1)
2016-05-17 14:42:11 -07:00
Jason Lowe 9c47862d87 MAPREDUCE-6698. Increase timeout on TestUnnecessaryBlockingOnHistoryFileInfo.testTwoThreadsQueryingDifferentJobOfSameUser. Contributed by Haibo Chen
(cherry picked from commit 34fddd1e91)
2016-05-17 15:04:02 +00:00
Jason Lowe 51e06c085f MAPREDUCE-6701. application master log can not be available when clicking jobhistory's am logs link. Contributed by Haibo Chen
(cherry picked from commit 12fa4ec141)
2016-05-17 14:56:23 +00:00
Akira Ajisaka 19db965c27 MAPREDUCE-6693. ArrayIndexOutOfBoundsException occurs when the length of the job name is equal to mapreduce.jobhistory.jobname.limit. Contributed by Ajith S.
(cherry picked from commit b357930526)
2016-05-17 20:22:46 +09:00
Jason Lowe 08743edd70 MAPREDUCE-6558. multibyte delimiters with compressed input files generate duplicate records. Contributed by Wilfred Spiegelenburg
(cherry picked from commit 9227dfc25f)
2016-05-13 14:35:34 +00:00
Steve Loughran eab6e633ee MAPREDUCE-6639 Process hangs in LocatedFileStatusFetcher if FileSystem.get throws. Ryan Blue via stevel 2016-05-12 19:00:08 +01:00
Jason Lowe d3dfed3fd0 MAPREDUCE-6684. High contention on scanning of user directory under immediate_done in Job History Server. Contributed by Haibo Chen
(cherry picked from commit 5ffb54694b)
2016-05-10 16:06:26 +00:00
Eric Payne 77d147e0ec MAPREDUCE-6678. Allow ShuffleHandler readahead without drop-behind. Contributed by Nathan Roberts.
(cherry picked from commit cd35b692de)
2016-05-10 16:04:09 +00:00
Jason Lowe d1aa3e0f89 MAPREDUCE-6689. MapReduce job can infinitely increase number of reducer resource requests. Contributed by Wangda Tan
(cherry picked from commit c9bb96fa81)
2016-05-06 22:27:24 +00:00
Vinod Kumar Vavilapalli e9c7a17bc8 MAPREDUCE-6514. Fixed MapReduce ApplicationMaster to properly updated resources ask after ramping down of all reducers avoiding job hangs. Contributed by Varun Saxena and Wangda Tan.
(cherry picked from commit 8d48266720)
2016-05-05 19:05:44 -07:00
Robert Kanter f9d6092108 MAPREDUCE-6675. TestJobImpl.testUnusableNode failed (haibochen via rkanter)
(cherry picked from commit 9d3fcdfbb3)
2016-05-04 22:42:34 -07:00
Robert Kanter cca8e9b90c MAPREDUCE-6677. LocalContainerAllocator doesn't specify resource of the containers allocated (haibochen via rkanter)
(cherry picked from commit ecce3b7d53)
2016-05-04 22:19:42 -07:00
Chris Nauroth 752a813283 MAPREDUCE-6672. TestTeraSort fails on Windows. Contributed by Tibor Kiss.
(cherry picked from commit 26ac0f8f0b)
2016-04-29 11:33:41 -07:00
Harsh J 2d7e4a8228 MAPREDUCE-2398. MRBench: setting the baseDir parameter has no effect. Contributed by Michael Noll and Wilfred Spiegelenburg.
(cherry picked from commit 7da5847cf1)
2016-04-21 17:54:24 +05:30
Jian He 70a31458e0 MAPREDUCE-6680. JHS UserLogDir scan algorithm sometime could skip directory with update in CloudFS (Azure FileSystem, S3, etc. Contributed by Junping Du
(cherry picked from commit 1e48eefe58)
2016-04-20 19:02:58 -07:00
Xuan 94e4d349b0 YARN-4965. Distributed shell AM failed due to ClientHandlerException thrown by jersey. Contributed by Junping Du
(cherry picked from commit e6c0742012)
2016-04-16 19:40:11 -07:00
Eric Payne edb096eab7 MAPREDUCE-6649. getFailureInfo not returning any failure info. Contributed by Eric Badger 2016-04-16 22:22:42 +00:00
Wangda Tan ab23acdfda MAPREDUCE-6513. MR job got hanged forever when one NM unstable for some time. (Varun Saxena via wangda) 2016-04-14 11:16:37 -07:00
Eric Payne 17c4f34b3d MAPREDUCE-6633. AM should retry map attempts if the reduce task encounters commpression related errors. Contributed by Rushabh Shah
(cherry picked from commit 1fec06e037)
2016-04-09 18:27:03 +00:00
Robert Kanter 3584cbc355 MAPREDUCE-6647. MR usage counters use the resources requested instead of the resources allocated (haibochen via rkanter)
(cherry picked from commit 3be1ab485f)
2016-04-06 17:16:10 -07:00
Junping Du 5574f82799 MAPREDUCE-6670. TestJobListCache#testEviction sometimes fails on Windows with timeout. Contributed by Gergely Novák.
(cherry picked from commit de96d7c88a)
2016-04-06 08:35:51 -07:00
Akira Ajisaka 94b2ba89a4 MAPREDUCE-6663. [NNBench] Refactor nnbench as a Tool implementation. Contributed by Brahma Reddy Battula.
(cherry picked from commit 690d8a368d)
2016-03-30 11:44:33 +09:00
Akira Ajisaka 7b2cf29f4f MAPREDUCE-6543. Migrate MR client test cases part 2. Contributed by Dustin Cote.
(cherry picked from commit 0050fa5f1c)

Conflicts:
	hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/TestMRJobClient.java
	hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/lib/partition/TestTotalOrderPartitioner.java
2016-03-29 18:20:01 +09:00
Rohith Sharma K S f22ce96b50 MAPREDUCE-6662. Clear ASF Warnings on test data files. Contributed by Vinayakumar B
(cherry picked from commit 0ef8bbfd87)
2016-03-29 10:35:04 +08:00
Junping Du ae29b1a17b MAPREDUCE-6655. Fix a typo (STRICT_IE6) in Encrypted Shuffle. Contributed by Wei-Chiu Chuang.
(cherry picked from commit 90fcb16c0f)
2016-03-28 05:31:46 -07:00
Akira Ajisaka 2b1f066d2d Revert "MAPREDUCE-6543. Migrate MR client test cases part 2. Contributed by Dustin Cote."
This reverts commit 0dc1453626.
2016-03-28 16:05:55 +09:00
Jason Lowe 8360d98d6a MAPREDUCE-6535. TaskID default constructor results in NPE on toString(). Contributed by Daniel Templeton
(cherry picked from commit 3f622a143c)
2016-03-25 20:07:56 +00:00
Akira Ajisaka 0dc1453626 MAPREDUCE-6543. Migrate MR client test cases part 2. Contributed by Dustin Cote.
(cherry picked from commit 2c268cc936)

Conflicts:
	hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/TestMRJobClient.java
	hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/lib/partition/TestTotalOrderPartitioner.java
2016-03-25 15:23:23 +09:00
Akira Ajisaka 7a3fd1bc1a MAPREDUCE-6656. [NNBench] OP_DELETE operation isn't working after MAPREDUCE-6363. Contributed by J.Andreina.
(cherry picked from commit 368c77376a)
2016-03-23 23:24:30 +09:00
Akira Ajisaka 12c1cc889a MAPREDUCE-6580. Test failure: TestMRJobsWithProfiler. Contributed by Eric Badger.
(cherry picked from commit 0bfe5a0167)
2016-03-23 13:19:08 +09:00
Li Lu 8bbb5efbfb MAPREDUCE-6110. JobHistoryServer CLI throws NullPointerException with job ids that do not exist. (Kai Sasaki via gtcarrera9)
(cherry picked from commit 57ead18a85)
2016-03-22 14:29:12 -07:00
Karthik Kambatla 95b59c17a7 YARN-4732. *ProcessTree classes have too many whitespace issues
(cherry picked from commit 7fae4c68e6)
2016-03-20 10:47:56 -07:00
Akira Ajisaka 365d236175 MAPREDUCE-6645. TestWordStats outputs logs under directories other than target/test-dir. Contributed by Gabor Liptak.
(cherry picked from commit 80fa70c4e1)
2016-03-17 18:09:20 +09:00
Wangda Tan abfb2957d1 MAPREDUCE-6579. JobStatus#getFailureInfo should not output diagnostic information when the job is running. (Akira AJISAKA via wangda)
(cherry picked from commit 6529c87551)
2016-03-15 17:30:37 -07:00
Akira Ajisaka c2e14d1bbb MAPREDUCE-6520. Migrate MR Client test cases part 1. Contributed by Dustin Cote.
(cherry picked from commit 247a790609)
2016-03-11 22:54:40 +09:00
Akira Ajisaka 99f61afcdd Revert "MAPREDUCE-6520. Migrate MR Client test cases part 1."
This reverts commit 7d665f0a98.
2016-03-11 22:52:10 +09:00
Akira Ajisaka 7d665f0a98 MAPREDUCE-6520. Migrate MR Client test cases part 1.
(cherry picked from commit ef68b44195)
2016-03-11 22:25:29 +09:00
Allen Wittenauer 9f4b3eaac0 Revert "HADOOP-12366. expose calculated paths (aw)"
This reverts commit 45bb467918.
2016-03-09 09:59:19 -08:00
Chris Nauroth 38a031ce68 HADOOP-12905. Clean up CHANGES.txt RAT exclusions from pom.xml files. Contributed by Chris Nauroth.
(cherry picked from commit 89b16d27e2)

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/pom.xml
	hadoop-mapreduce-project/pom.xml
2016-03-08 21:22:57 -08:00
Varun Vasudev e9a0ffc7f1 YARN-4737. Add CSRF filter support in YARN. Contributed by Jonathan Maron.
(cherry picked from commit 43416187c07afb35e3267f94d0a41d8d3cfb5735)
2016-03-07 15:23:36 +05:30
Harsh J ed22444a60 MAPREDUCE-6648. Add yarn.app.mapreduce.am.log.level to mapred-default.xml (harsh) 2016-03-07 13:13:05 +05:30
Masatake Iwasaki 722182fdfb HADOOP-12470. In-page TOC of documentation should be automatically generated by doxia macro (iwasakims)
(cherry picked from commit cbd31328a6)

 Conflicts:
	hadoop-common-project/hadoop-common/src/site/markdown/CommandsManual.md
	hadoop-common-project/hadoop-common/src/site/markdown/UnixShellGuide.md
2016-03-04 14:12:44 +09:00
Andrew Wang 670944810c HADOOP-11792. Remove all of the CHANGES.txt files. 2016-03-03 21:02:58 -08:00
Robert Kanter f9f57265cf MAPREDUCE-4785. TestMRApp occasionally fails (haibochen via rkanter)
(cherry picked from commit ff0ee84d77)
2016-03-03 16:38:25 -08:00
Robert Kanter 48cb4b9ba7 MAPREDUCE-6622. Add capability to set JHS job cache to a task-based limit (rchiang via rkanter)
(cherry picked from commit 0f72da7e28)
2016-02-26 17:57:45 -08:00
Robert Kanter ec48848711 YARN-4701. When task logs are not available, port 8041 is referenced instead of port 8042 (haibochen via rkanter)
(cherry picked from commit c4d4df8de0)
2016-02-25 12:48:29 -08:00
Robert Kanter d9f01f28a0 MAPREDUCE-6640. mapred job -history command should be able to take Job ID (rkanter)
(cherry picked from commit 4343a4cf77)
2016-02-23 17:38:25 -08:00
Varun Vasudev f1999fe275 MAPREDUCE-6635. Unsafe long to int conversion in UncompressedSplitLineReader and IndexOutOfBoundsException. Contributed by Junping Du.
(cherry picked from commit c6f2d761d5)
2016-02-23 13:05:52 +05:30
Tsuyoshi Ozawa 929e869ae0 YARN-4708. Missing default mapper type in TimelineServer performance test tool usage. Contributed by Kai Sasaki.
(cherry picked from commit b68901d7dd)
2016-02-22 07:55:35 +09:00
Andrew Wang 7f6737951a MAPREDUCE-6637. Testcase Failure : TestFileInputFormat.testSplitLocationInfo. Contributed by Brahma Reddy Battula.
(cherry picked from commit 37577852ba)
2016-02-19 16:33:40 -08:00
Robert Kanter a33109a0b8 MAPREDUCE-6627. Add machine-readable output to mapred job -history command (rkanter)
(cherry picked from commit 8eee59ce6b)
2016-02-18 17:58:40 -08:00
Robert Kanter f864faaafa HADOOP-12817. Enable TLS v1.1 and 1.2 (rkanter)
(cherry picked from commit a365a3941c)
2016-02-18 11:11:32 -08:00
Varun Vasudev 212c519ad3 MAPREDUCE-6634. Log uncaught exceptions/errors in various thread pools in mapreduce. Contributed by Sidharta Seethana.
(cherry picked from commit c50d1e54000c76880a041ce5959a2eb23c86bd35)
2016-02-18 14:19:01 +05:30
Tsuyoshi Ozawa a33cdfb875 MAPREDUCE-6341. addendum patch to fix typos. Contributed by John Michael Luy.
(cherry picked from commit 453e7e0d10)
2016-02-17 14:18:04 +09:00
Junping Du a28be9edc7 Set the release date for 2.6.4.
(cherry picked from commit ec12ce8f48)
2016-02-13 01:44:12 -08:00
Jason Lowe 303c650d0d MAPREDUCE-6191. Improve clearing stale state of Java serialization
testcase.  (Sam Liu via Eric Yang)
(cherry picked from commit c379e102dd)

Conflicts:

	hadoop-mapreduce-project/CHANGES.txt
2016-02-10 16:44:12 +00:00
Akira Ajisaka 15ef3a85d9 Revert "HDFS-9686. Remove useless boxing/unboxing code. Contributed by Kousuke Saruta."
This reverts commit e4c01b8b1c.
2016-02-10 23:45:15 +09:00
Akira Ajisaka 9a55d3a7cb MAPREDUCE-6626. Reuse ObjectMapper instance in MapReduce. Contributed by Lin Yiqun.
(cherry picked from commit 10393d9a666419a5d8dc0cfb48da96e9c690c11e)
2016-02-10 03:05:16 +09:00
Jason Lowe 57d79f908e Update CHANGES.txt to reflect recent commits to branch-2.7 and branch-2.6.
(cherry picked from commit fba6e9f5ef)
2016-02-09 16:55:40 +00:00
Akira Ajisaka e4c01b8b1c HDFS-9686. Remove useless boxing/unboxing code. Contributed by Kousuke Saruta.
(cherry picked from commit fe124da5ff)
2016-02-06 19:32:50 +09:00
Junping Du 3583c77ee8 Adding release 2.6.5 to CHANGES.txt 2016-02-02 18:09:17 -08:00
Robert Kanter 358c49d830 MAPREDUCE-6620. Jobs that did not start are shown as starting in 1969 in the JHS web UI (haibochen via rkanter)
(cherry picked from commit ccbba4a4de)
2016-02-02 15:21:51 -08:00
Jason Lowe 4ee0977687 MAPREDUCE-6621. Memory Leak in JobClient#submitJobInternal(). Contributed by Xuan Gong
(cherry picked from commit 43e669b22d)
2016-02-02 19:31:33 +00:00
Wangda Tan 9591363ad8 YARN-4340. Add list API to reservation system. (Sean Po via wangda)
(cherry picked from commit 9875325d5c)
2016-02-02 10:19:19 +08:00
Jason Lowe f5f6652137 MAPREDUCE-6618. YarnClientProtocolProvider leaking the YarnClient thread. Contributed by Xuan Gong
(cherry picked from commit 59a212b6e1)
2016-02-01 16:06:42 +00:00
Akira Ajisaka 6ce9b1240e MAPREDUCE-6616. Fail to create jobhistory file if there are some multibyte characters in the job name. Contributed by Kousuke Saruta.
(cherry picked from commit d314a3f99d5d03c62a3b8fb8883886440ab7d1db)
2016-01-29 16:20:37 +09:00
cnauroth bd01fdb64d MAPREDUCE-6563. Streaming documentation contains a stray % character. Contributed by Chris Nauroth.
(cherry picked from commit 41da9a0773)

Conflicts:
	hadoop-mapreduce-project/CHANGES.txt
2016-01-28 14:46:42 -08:00
Junping Du db7ff115c0 MAPREDUCE-6595. Fix findbugs warnings in OutputCommitter and FileOutputCommitter. Contributed by Akira AJISAKA.
(cherry picked from commit 86560a4978)
2016-01-28 06:18:59 -08:00
Robert Kanter a99fa74490 MAPREDUCE-6431. JobClient should be an AutoClosable (haibochen via rkanter)
(cherry picked from commit dca0dc8ac2)
2016-01-27 17:11:41 -08:00
Jian He da18bbedaf MAPREDUCE-6619. HADOOP_CLASSPATH is overwritten in MR container. Contributed by Junping Du 2016-01-27 13:16:59 -08:00
Jian He ad42229683 MAPREDUCE-6610. JobHistoryEventHandler should not swallow timeline response. Contributed by Li Lu 2016-01-25 23:01:29 -08:00
Vinod Kumar Vavilapalli (I am also known as @tshooter.) 97f6cfa94b Release process for 2.7.2: Set the release date for 2.7.2
(cherry picked from commit ec4d2d9f40)
2016-01-25 15:47:02 -08:00
Akira Ajisaka a9386cae6e MAPREDUCE-6614. Remove unnecessary code in TestMapreduceConfigFields. Contributed by Kai Sasaki. 2016-01-25 11:39:42 +09:00
Akira Ajisaka 7f215ffdd5 MAPREDUCE-6605. Fix typos mapreduce.map.skip.proc.count.autoincr and mapreduce.reduce.skip.proc.count.autoincr in mapred-default.xml. Contributed by Kai Sasaki. 2016-01-22 18:37:17 +09:00
Karthik Kambatla ef59521094 YARN-4526. Make SystemClock singleton so AppSchedulingInfo could use it. (kasha)
(cherry picked from commit d40859fab1)

Conflicts:
	hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapred/TestTaskAttemptListenerImpl.java
2016-01-18 10:59:34 +01:00
Jason Lowe 5923f50797 MAPREDUCE-6554. MRAppMaster servicestart failing with NPE in MRAppMaster#parsePreviousJobHistory. Contributed by Bibin A Chundatt
(cherry picked from commit 9fbd579ab5)
2016-01-15 16:53:34 +00:00
Akira Ajisaka 7c4be15991 MAPREDUCE-6601. Fix typo in Job#setUseNewAPI. Contributed by Kai Sasaki.
(cherry picked from commit 5cc44d18aa)
2016-01-15 00:44:42 +09:00
Akira Ajisaka 6efee8907a MAPREDUCE-6363. [NNBench] Lease mismatch error when running with multiple mappers. Contributed by Vlad Sharanhovich and Bibin A Chundatt.
(cherry picked from commit 7b0964f354)
2016-01-14 10:41:22 +09:00
Vinod Kumar Vavilapalli (I am also known as @tshooter.) 8de365a11c MAPREDUCE-6549. multibyte delimiters with LineRecordReader cause duplicate records (wilfreds via rkanter)
Removed multiple duplicate CHANGES.txt entries.

(cherry picked from commit 9b33a03900)
2016-01-13 15:04:09 -08:00
Jason Lowe 0af01092b6 MAPREDUCE-6473. Job submission can take a long time during Cluster initialization. Contributed by Kuhu Shukla
(cherry picked from commit f657b54281)
2016-01-12 23:58:01 +00:00
Wangda Tan 15e174fe79 YARN-4582. Label-related invalid resource request exception should be able to properly handled by application. (Bibin A Chundatt via wangda)
(cherry picked from commit 9e792da014)
2016-01-12 12:54:09 +08:00
Jason Lowe 6944e7ef44 Add MR-5982 and MR-6492 to 2.6.4
(cherry picked from commit e5df366707)
2016-01-11 18:32:48 +00:00
Junping Du 51073c910c MAPREDUCE-6068. Illegal progress value warnings in map tasks. Contributed by Binglin Chang.
(cherry picked from commit 8c1adeaa26)
2016-01-11 06:13:53 -08:00
Sangjin Lee 7458854888 MAPREDUCE-6577 addendum. Moved the changelog to 2.6.4 which is the earliest target.
(cherry picked from commit 355c0ce723)
2016-01-05 15:45:01 -08:00
Sangjin Lee 2dfa0613a1 MAPREDUCE-6577. MR AM unable to load native library without MR_AM_ADMIN_USER_ENV set (sjlee)
(cherry picked from commit f6f16118d3)
2016-01-05 15:25:47 -08:00
Akira Ajisaka 6d235f0b91 MAPREDUCE-6593. TestJobHistoryEventHandler.testTimelineEventHandling fails on trunk because of NPE. Contributed by Naganarasimha G R.
(cherry picked from commit 7dafee11d8)
2016-01-04 16:31:28 +09:00
Akira Ajisaka 247ab92464 Set release date for 2.6.3
(cherry picked from commit db99e30f67)
2016-01-04 16:12:52 +09:00
Akira Ajisaka a8314505d0 MAPREDUCE-6589. TestTaskLog outputs a log under directory other than target/test-dir. (aajisaka)
(cherry picked from commit 2a59d01503)
2015-12-30 01:34:15 +09:00
Akira Ajisaka 1a06949126 MAPREDUCE-6584. Remove trailing whitespaces from mapred-default.xml. (aajisaka) 2015-12-30 01:04:11 +09:00
Wangda Tan ca575e6add MAPREDUCE-6574. MR AM should print host of failed tasks. (Mohammad Shahid Khan via wangda)
(cherry picked from commit 32b3dc11eb)
2015-12-28 11:04:30 -08:00
Rohith Sharma K S 2d0348c907 MAPREDUCE-6419. JobHistoryServer doesn't sort properly based on Job ID when Job id's exceed 9999. (Mohammad Shahid Khan via rohithsharmaks)
(cherry picked from commit a308e86621)
2015-12-24 12:00:37 +05:30
Akira Ajisaka 8607cb6074 MAPREDUCE-6583. Clarify confusing sentence in MapReduce tutorial document. Contributed by Kai Sasaki.
(cherry picked from commit 7995a6ea4d)
2015-12-21 00:16:39 +09:00