Commit Graph

2932 Commits

Author SHA1 Message Date
Eric Badger 138021ce23 [MAPREDUCE-7234] ClientHSSecurityInfo class is in wrong META-INF file.
Contributed by Eric Badger.

(cherry picked from commit a17dc4e821)
2021-03-02 21:49:09 +00:00
Ahmed Hussein 792329fde9 MAPREDUCE-7320. organize test directories for ClusterMapReduceTestCase (#2722). Contributed by Ahmed Hussein
(cherry picked from commit e04bcb3a06)
2021-02-26 19:56:07 +00:00
Akira Ajisaka 3339ff5966
MAPREDUCE-7323. Remove job_history_summary.py. (#2712)
Reviewed-by: Takanobu Asanuma <tasanuma@apache.org>
(cherry picked from commit 8bca105655)
2021-02-22 23:16:05 +09:00
Eric Badger 37971c71d1 MAPREDUCE-7319. Log list of mappers at trace level in ShuffleHandler audit log.
Contributed by Jim Brennan.

(cherry picked from commit 462561654b)
2021-02-09 19:03:20 +00:00
Jungtaek Lim ebdacedc83
MAPREDUCE-7317. Add latency information in FileOutputCommitter.mergePaths. (#2624)
Contributed by Jungtaek Lim.

Change-Id: Iaff2f55e5378c22ce8a92ae776f5aba3f0fc304e
2021-01-27 19:08:54 +00:00
Steve Loughran 5be450393c
MAPREDUCE-7315. LocatedFileStatusFetcher to collect/publish IOStatistics. (#2579)
Part of the HADOOP-16830 IOStatistics API feature.

If the source FileSystem's listing RemoteIterators
implement IOStatisticsSource, these are collected and served through
the IOStatisticsSource API. If they are not: getIOStatistics() returns
null.

Only the listing statistics are collected; FileSystem.globStatus() doesn't
provide any, so IO use there is not included in the aggregate results.

Contributed by Steve Loughran.

Change-Id: Iff1485297c2c7e181b54eaf1d2c4f80faeee7cfa
2021-01-14 13:20:38 +00:00
lzx404243 b3f85576e9
MAPREDUCE-7310. Clear the fileMap in JHEventHandlerForSigtermTest (#2499)
Co-authored-by: Zhengxi Li <zli89@illinois.edu>
Reviewed-by: Wanqiang Ji <jiwq@apache.org>
Signed-off-by: Akira Ajisaka <aajisaka@apache.org>
(cherry picked from commit ca7dd5fad3)
2021-01-12 15:45:54 +09:00
He Xiaoqiao e95ee67632
Make upstream aware of 3.2.2 release. 2021-01-09 18:07:10 +08:00
dengzh bc0c3ece0f HADOOP-17390. Skip license check on lz4 code files (#2478)
The relevant files are `Copyright (C) 2011-present, Yann Collet.` and licensed on the BSD 2-clause license

Contributed by Zhihua Deng.
2020-12-29 13:32:26 -08:00
Liang-Chi Hsieh 87064df1f2 HADOOP-17292. Using lz4-java in Lz4Codec (#2350)
Contributed by Liang-Chi Hsieh.
2020-12-29 13:17:26 -08:00
Akira Ajisaka 71bda1a2e8
HADOOP-17138. Fix spotbugs warnings surfaced after upgrade to 4.0.6. (#2155) (#2538)
(cherry picked from commit 1b29c9bfee)

Co-authored-by: Masatake Iwasaki <iwasakims@apache.org>
2020-12-11 13:58:02 +09:00
Ayush Saxena 8378ab9f92 HADOOP-17288. Use shaded guava from thirdparty. Contributed by Ayush Saxena. #2505 2020-12-10 05:50:55 +05:30
Akira Ajisaka efd74cc8ae
MAPREDUCE-7284. TestCombineFileInputFormat#testMissingBlocks fails (#2136)
(cherry picked from commit 3e7b65c3e5)
2020-12-04 10:07:58 +09:00
Akira Ajisaka db04195afd
HADOOP-17394. [JDK 11] Fix error in mvn package -Pdocs (#2488)
Reviewed-by: Takanobu Asanuma <tasanuma@apache.org>
(cherry picked from commit 2ce2198287)
2020-11-26 11:34:39 +09:00
Peter Bacsko 8ed565382f MAPREDUCE-7309. Improve performance of reading resource request for mapper/reducers from config. Contributed by Peter Bacsko & Wangda Tan. 2020-11-25 11:36:58 +01:00
dengzh abc87aef18
MAPREDUCE-7307. Potential thread leak in LocatedFileStatusFetcher. (#2469)
Contributed by Zhihua Deng.

Change-Id: Iee62539d02bd8f8a928171d8258e640487050a05
2020-11-23 16:33:41 +00:00
Peter Bacsko ced08fd87f MAPREDUCE-7304. Enhance the map-reduce Job end notifier to be able to notify the given URL via a custom class. Contributed by Zoltan Erdmann 2020-11-20 13:14:49 +01:00
Akira Ajisaka 71c106b412
MAPREDUCE-7305. [JDK 11] TestMRJobsWithProfiler fails. (#2463)
(cherry picked from commit 2045a9df13)
2020-11-18 14:16:45 +09:00
Akira Ajisaka c40f0f1eb3
MAPREDUCE-7303. Fix TestJobResourceUploader failures after HADOOP-16878. Contributed by Peter Bacsko.
(cherry picked from commit 7bc305db5d)
2020-10-23 04:41:37 +09:00
Swaroopa Kadam 05a73ded93
MAPREDUCE-7301: Expose Mini MR Cluster attribute for testing
Signed-off-by: Mingliang Liu <liuml07@apache.org>
2020-10-12 11:09:08 -07:00
Liang-Chi Hsieh 8f60a90688 HADOOP-17125. Use snappy-java in SnappyCodec (#2297)
This switches the SnappyCodec to use the java-snappy codec, rather than the native one.

To use the codec, snappy-java.jar (from org.xerial.snappy) needs to be on the classpath.

This comesin as an avro dependency,  so it is already on the hadoop-common classpath,
as well as in hadoop-common/lib.
The version used is now managed in the hadoop-project POM; initially 1.1.7.7

Contributed by DB Tsai and Liang-Chi Hsieh

Change-Id: Id52a404a0005480e68917cd17f0a27b7744aea4e
2020-10-06 17:15:17 +01:00
Wanqiang Ji eb6134cd22
MAPREDUCE-7289. Fix wrong comment in LongLong.java (#2338)
(cherry picked from commit 143bdd4188)
2020-09-29 23:07:58 +09:00
zz e5e91397de
MAPREDUCE-7294. Only application master should upload resource to Yarn Shared Cache (#2223)
Contributed by Zhenzhao Wang <zhenzhaowang@gmail.com>

Signed-off-by: Mingliang Liu <liuml07@apache.org>
2020-09-19 23:26:37 -07:00
Wanqiang Ji ffb96775e3
MAPREDUCE-7288. Fix TestLongLong#testRightShift (#2183)
(cherry picked from commit dc5470ae86)
2020-08-06 09:36:34 +09:00
ywheel 2efa28cb79
MAPREDUCE-7051. Fix typo in MultipleOutputFormat (#338)
(cherry picked from commit cf4eb75608)
2020-07-30 13:28:35 +09:00
Ayush Saxena e3b8d4eb05 HADOOP-17100. Replace Guava Supplier with Java8+ Supplier in Hadoop. Contributed by Ahmed Hussein. 2020-07-22 18:21:14 +05:30
Ahmed Hussein 5969922305 HADOOP-17101. Replace Guava Function with Java8+ Function
Signed-off-by: Jonathan Eagles <jeagles@gmail.com>
(cherry picked from commit 98fcffe93f)
2020-07-15 09:57:36 -05:00
Masatake Iwasaki 56d72adbdd MAPREDUCE-7281. Fix NoClassDefFoundError on 'mapred minicluster'. (#2077)
(cherry picked from commit 8fd0fdf889)
2020-06-20 21:39:57 +09:00
Vinayakumar B 534b15caf9
HADOOP-17046. Support downstreams' existing Hadoop-rpc implementations using non-shaded protobuf classes (#2026) 2020-06-12 23:20:10 +05:30
Eric Badger 890617c7ac Revert "MAPREDUCE-7277. IndexCache totalMemoryUsed differs from cache contents. Contributed by Jon Eagles (jeagles)."
This reverts commit 741fcf2c63.
2020-06-08 20:25:02 +00:00
Wilfred Spiegelenburg 586d9427e3
MAPREDUCE-7278. Speculative execution behavior is observed even when mapreduce.map.speculative and mapreduce.reduce.speculative are false
Contributed by Tarun Parimi.

(cherry picked from commit 10db97df1c)
2020-05-28 13:36:21 +10:00
Akira Ajisaka dfa7f160a5
Preparing for 3.3.1 development 2020-04-30 13:33:42 +09:00
Szilard Nemeth e45faae1d4 YARN-10215. Endpoint for obtaining direct URL for the logs. Contributed by Andras Gyori
(cherry picked from commit ab36429559)
2020-04-28 18:56:29 +02:00
Eric E Payne 741fcf2c63 MAPREDUCE-7277. IndexCache totalMemoryUsed differs from cache contents. Contributed by Jon Eagles (jeagles).
(cherry picked from commit e2322e1117)
2020-04-27 19:34:38 +00:00
Eric E Payne b397a3a875 MAPREDUCE-7272. TaskAttemptListenerImpl excessive log messages. Contributed by Ahmed Hussein (ahussein)
(cherry picked from commit 11d17417ce)
2020-04-13 18:51:00 +00:00
Szilard Nemeth ef01e9d40e MAPREDUCE-7266. historyContext doesn't need to be a class attribute inside JobHistoryServer. Contributed by Siddharth Ahuja
(cherry picked from commit e2c87b7917)
2020-04-09 12:40:22 +02:00
Akira Ajisaka cb806221e9
MAPREDUCE-7269. TestNetworkedJob fails (#1940)
(cherry picked from commit ab7495dc7d)
2020-04-06 17:58:25 +09:00
Wanqiang Ji 215a62e99f
MAPREDUCE-7268. Fix TestMapreduceConfigFields (#1935)
(cherry picked from commit f8e598f278)
2020-04-03 11:00:02 +09:00
Wanqiang Ji ea688631b0
MAPREDUCE-7237. Supports config the shuffle's path cache related parameters (#1397) 2020-03-16 11:28:36 +09:00
Szilard Nemeth 8d6ff87c18 MAPREDUCE-7263. Remove obsolete validateTargetPath() from FrameworkUploader. Contributed by Marton Hudaky 2020-02-12 15:53:33 +01:00
Vinayakumar B 7dac7e1d13
HADOOP-16596. [pb-upgrade] Use shaded protobuf classes from hadoop-thirdparty dependency (#1635). Contributed by Vinayakumar B. 2020-02-07 14:51:24 +05:30
Szilard Nemeth 71b2c2ffe9 YARN-10101. Support listing of aggregated logs for containers belonging to an application attempt. Contributed by Adam Antal 2020-02-06 12:25:06 +01:00
Eric E Payne b897f6834b MAPREDUCE-7079: JobHistory#ServiceStop implementation is incorrect. Contributed by Ahmed Hussein (ahussein) 2020-01-29 16:54:45 +00:00
Szilard Nemeth 7f3e1e0c07 MAPREDUCE-7260. Cross origin request support for Job history server web UI. Contributed by Adam Antal 2020-01-29 14:42:52 +01:00
Ahmed Hussein 08251538fe MAPREDUCE-7259. testSpeculateSuccessfulWithUpdateEvents fails Intermittently
Signed-off-by: Jonathan Eagles <jeagles@gmail.com>
2020-01-28 10:57:33 -06:00
Ahmed Hussein 3f01c48106 MAPREDUCE-7262. MRApp helpers block for long intervals (500ms)
Signed-off-by: Jonathan Eagles <jeagles@gmail.com>
2020-01-27 15:50:13 -06:00
Szilard Nemeth 9520b2ad79 YARN-10083. Provide utility to ask whether an application is in final status. Contributed by Adam Antal 2020-01-22 16:25:07 +01:00
kevinzhao1661 b8518e6dab MAPREDUCE-7247. Modify HistoryServerRest.html content,change The job attempt id‘s datatype from string to int (#1684) 2020-01-16 12:53:56 +09:00
Masatake Iwasaki a2fdd7c2b5 MAPREDUCE-7256. Fix javadoc error in SimpleExponentialSmoothing. (#1804) 2020-01-15 12:09:09 +09:00
Szilard Nemeth 13cea0412c YARN-10028. Integrate the new abstract log servlet to the JobHistory server. Contributed by Adam Antal 2020-01-14 11:00:08 +01:00
Eric E Payne 93233a7d6e YARN-9018. Add functionality to AuxiliaryLocalPathHandler to return all locations to read for a given path. Contributed by Kuhu Shukla (kshukla) 2020-01-09 17:18:44 +00:00
Ahmed Hussein cdd6efd3ab MAPREDUCE-7252. Handling 0 progress in SimpleExponential task runtime estimator
Signed-off-by: Jonathan Eagles <jeagles@gmail.com>
2020-01-08 11:08:13 -06:00
Sergey Pogorelov b343e1533b MAPREDUCE-7255. Fix typo in MapReduce documentaion example (#1793) 2020-01-06 12:36:11 +09:00
Sunil G 682e6fdeda YARN-9052. Replace all MockRM submit method definitions with a builder. Contributed by Szilard Nemeth. 2019-12-05 13:26:23 +05:30
prabhujoseph da9aa9c909 MAPREDUCE-7250. FrameworkUploader skip replication check if timeout is 0.
Contributed by Peter Bacsko.
2019-12-05 12:32:57 +05:30
prabhujoseph 304e75a48b Revert "MAPREDUCE-7250. FrameworkUploader skip replication check if timeout is 0."
This reverts commit 8d82c44102.
2019-12-05 12:31:13 +05:30
prabhujoseph 8d82c44102 MAPREDUCE-7250. FrameworkUploader skip replication check if timeout is 0.
Contributed by Peter Bacsko.
2019-12-04 20:20:56 +05:30
prabhujoseph 013c6e51b6 MAPREDUCE-7249. Fix Invalid event TA_TOO_MANY_FETCH_FAILURE at SUCCESS_CONTAINER_CLEANUP causes job failure.
Contributed by Wilfred Spiegelenburg.
2019-11-28 10:57:15 +05:30
prabhujoseph 7f2ea2ac46 MAPREDUCE-7240. Fix Invalid event: TA_TOO_MANY_FETCH_FAILURE at SUCCESS_FINISHING_CONTAINER.
Contributed by Huachao and Peter Bacsko. Reviewed by Wilfred Spiegelenburg.
2019-11-27 14:27:27 +05:30
Ahmed Hussein ed302f1fed MAPREDUCE-7208. Tuning TaskRuntimeEstimator. (Ahmed Hussein via jeagles)
Signed-off-by: Jonathan Eagles <jeagles@gmail.com>
2019-11-05 14:55:20 -06:00
Jonathan Hung e6137d0e50 Make upstream aware of 2.10.0 release 2019-10-30 20:58:32 -07:00
Eric Yang ac6b6a6a85 HADOOP-16614. Add aarch64 support for dependent leveldbjni.
Contributed by liusheng
close #1546
2019-10-24 11:45:57 -04:00
Jonathan Hung 5462d2176f YARN-9760. Support configuring application priorities on a workflow level. Contributed by Varun Saxena 2019-10-08 11:20:13 -07:00
Steve Loughran 1921e94292
HADOOP-16458. LocatedFileStatusFetcher.getFileStatuses failing intermittently with S3
Contributed by Steve Loughran.

Includes
-S3A glob scans don't bother trying to resolve symlinks
-stack traces don't get lost in getFileStatuses() when exceptions are wrapped
-debug level logging of what is up in Globber
-Contains HADOOP-13373. Add S3A implementation of FSMainOperationsBaseTest.
-ITestRestrictedReadAccess tests incomplete read access to files.

This adds a builder API for constructing globbers which other stores can use
so that they too can skip symlink resolution when not needed.

Change-Id: I23bcdb2783d6bd77cf168fdc165b1b4b334d91c7
2019-10-01 18:11:05 +01:00
Duo Zhang e8e7d7b4cd
HADOOP-16561. [MAPREDUCE] use protobuf-maven-plugin to generate protobuf classes (#1500)
Signed-off-by: Vinayakumar B <vinayakumarb@apache.org>
2019-09-24 08:52:12 +08:00
Daisuke Kobayashi bc2d3a71d6 HADOOP-16549. Remove Unsupported SSL/TLS Versions from Docs/Properties. Contributed by Daisuke Kobayashi.
Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>
Reviewed-by: Akira Ajisaka <aajisaka@apache.org>
2019-09-10 10:51:47 +08:00
Tao Yang 5d497abe21 YARN-9817. Fix failing testcases due to not initialized AsyncDispatcher - ArithmeticException: / by zero. Contributed by Prabhu Joseph. 2019-09-07 07:39:02 +08:00
Szilard Nemeth 3f4f097f1f MAPREDUCE-7230. TestHSWebApp.testLogsViewSingle fails. Contributed by Prabhu Joseph 2019-08-15 17:07:43 +02:00
Szilard Nemeth ac6c4f0b29 MAPREDUCE-7197. Fix order of actual and expected expression in assert statements. Contributed by Adam Antal 2019-08-12 13:54:28 +02:00
Szilard Nemeth a7371a779c MAPREDUCE-7225: Fix broken current folder expansion during MR job start. Contributed by Peter Bacsko. 2019-08-01 13:01:30 +02:00
Chen Zhang 8a59cd1b8a HDFS-12967. NNBench should support multi-cluster access. Contributed by Chen Zhang.
Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>
2019-07-29 05:55:12 -07:00
Mehul Garnara c0a0c353e8
MAPREDUCE-6973. Fix comments on creating _SUCCESS file.
This closes #280

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>
2019-07-26 21:21:26 +09:00
pingsutw ee87e9a42e
MAPREDUCE-7076. TestNNBench#testNNBenchCreateReadAndDelete failing in our internal build
This closes #1089

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>
2019-07-23 10:34:10 +09:00
Masatake Iwasaki 79f6118dcc
MAPREDUCE-6521. MiniMRYarnCluster should not create /tmp/hadoop-yarn/staging on local filesystem in unit test.
Contributed by Masatake Iwasaki.

Change-Id: Id74b90eb7cfb9d676188fc5aa47249ee8904a3d5
2019-07-18 13:15:18 +01:00
Wanqiang Ji b417a4c854
MAPREDUCE-7214. Remove unused pieces related to `mapreduce.job.userlog.retain.hours`
Signed-off-by: Akira Ajisaka <aajisaka@apache.org>
2019-06-11 18:40:35 +09:00
Akira Ajisaka 3ea4f41d9f
MAPREDUCE-6794. Remove unused properties from TTConfig.java 2019-06-07 10:27:41 +09:00
Wanqiang Ji e7e30a5f8b
MAPREDUCE-7210. Replace `mapreduce.job.counters.limit` with `mapreduce.job.counters.max` in mapred-default.xml
This closes #878

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>
2019-06-05 10:45:23 +09:00
Akira Ajisaka afd844059c HADOOP-16331. Fix ASF License check in pom.xml
Signed-off-by: Takanobu Asanuma <tasanuma@apache.org>
2019-05-29 17:25:13 +09:00
Akira Ajisaka 9f933e6446
HADOOP-16323. https everywhere in Maven settings. 2019-05-27 15:24:59 +09:00
Akira Ajisaka 5565f2c532
MAPREDUCE-7198. mapreduce.task.timeout=0 configuration used to disable timeout doesn't work. 2019-05-23 10:21:11 +09:00
Wanqiang Ji 67f9a7b165
MAPREDUCE-7205. Treat container scheduler kill exit code as a task attempt killing event.
This closes #821

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>
2019-05-22 14:23:13 +09:00
Akira Ajisaka afe6613ee6
MAPREDUCE-7200. Remove stale eclipse templates. Contributed by Wanqiang Ji. 2019-04-25 11:18:39 +09:00
Gabor Bota d7979079ea HADOOP-16210. Update guava to 27.0-jre in hadoop-project trunk. Contributed by Gabor Bota. 2019-04-03 12:59:39 -06:00
Adam Antal 856cbf62d3 MAPREDUCE-7190. Add SleepJob additional parameter to make parallel runs distinguishable. Contributed by Adam Antal.
Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>
2019-04-01 10:25:38 -07:00
David Mollitor 246ab77f28
HADOOP-16196. Path Parameterize Comparable.
Author:    David Mollitor <david.mollitor@cloudera.com>
2019-03-22 10:26:24 +00:00
Steve Loughran 9f1c017f44
HADOOP-16058. S3A tests to include Terasort.
Contributed by Steve Loughran.

This includes
 - HADOOP-15890. Some S3A committer tests don't match ITest* pattern; don't run in maven
 - MAPREDUCE-7090. BigMapOutput example doesn't work with paths off cluster fs
 - MAPREDUCE-7091. Terasort on S3A to switch to new committers
 - MAPREDUCE-7092. MR examples to work better against cloud stores
2019-03-21 11:15:37 +00:00
Shweta Yakkali cb4d911a82 MAPREDUCE-7188. [Clean-up] Remove NULL check before instanceof and fix checkstyle issue in TaskResult
(Contributed by Shweta Yakkali via Daniel Templeton)

Change-Id: Ie5eb9462f94e45cfd9d2a4b85c081ac8be949c07
2019-03-18 04:45:01 -07:00
Weiwei Yang 159a715eef MAPREDUCE-7192. JobHistoryServer attempts page support jump to containers log page in NM when logAggregation is disable. Contributed by Jiandan Yang. 2019-03-13 17:00:35 +08:00
Weiwei Yang f0605146b3 MAPREDUCE-7191. JobHistoryServer should log exception when loading/parsing history file failed. Contributed by Jiandan Yang. 2019-03-11 15:02:54 +08:00
Wangda Tan 308f3168fa Make upstream aware of 3.1.2 release
Change-Id: I397bc6ef75498726df4763bd07a8bf8fe1c38365
2019-02-05 14:03:18 -08:00
Steve Loughran f365957c63
HADOOP-15229. Add FileSystem builder-based openFile() API to match createFile();
S3A to implement S3 Select through this API.

The new openFile() API is asynchronous, and implemented across FileSystem and FileContext.

The MapReduce V2 inputs are moved to this API, and you can actually set must/may
options to pass in.

This is more useful for setting things like s3a seek policy than for S3 select,
as the existing input format/record readers can't handle S3 select output where
the stream is shorter than the file length, and splitting plain text is suboptimal.
Future work is needed there.

In the meantime, any/all filesystem connectors are now free to add their own filesystem-specific
configuration parameters which can be set in jobs and used to set filesystem input stream
options (seek policy, retry, encryption secrets, etc).

Contributed by Steve Loughran
2019-02-05 11:51:02 +00:00
Akira Ajisaka c991e2ca5a
MAPREDUCE-7177. Disable speculative execution in TestDFSIO. Contributed by Zhaohui Xin. 2019-02-04 14:03:34 +09:00
Akira Ajisaka 1129288cf5
HADOOP-14178. Move Mockito up to version 2.23.4. Contributed by Akira Ajisaka and Masatake Iwasaki. 2019-01-29 18:29:56 -08:00
Eric Yang 1ab69a9543 YARN-9221. Added flag to disable dynamic auxiliary service feature.
Contributed by Billie Rinaldi
2019-01-25 19:05:36 -05:00
Eric Yang a33ef4fd31 YARN-8867. Added resource localization status to YARN service status call.
Contributed by Chandni Singh
2019-01-24 18:43:21 -05:00
Eric Yang 2fa9389c2e YARN-9146. Added REST API to configure auxiliary service.
Contributed by Billie Rinaldi
2019-01-22 18:24:43 -05:00
Steve Loughran 6d0bffe17e
HADOOP-14556. S3A to support Delegation Tokens.
Contributed by Steve Loughran and Daryn Sharp.
2019-01-14 17:59:27 +00:00
Akira Ajisaka 7f78397036
Revert "HADOOP-14556. S3A to support Delegation Tokens."
This reverts commit d7152332b3.
2019-01-08 14:51:30 +09:00
Steve Loughran d7152332b3
HADOOP-14556. S3A to support Delegation Tokens.
Contributed by Steve Loughran.
2019-01-07 13:18:03 +00:00
Weiwei Yang 9e7196749e MAPREDUCE-7174. Mapreduce example wordmedian should handle generic options. Contributed by Fei Hui. 2019-01-02 21:39:45 +08:00