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[MAPREDUCE-6699] hadoop-mapred unit tests for dynamic commands - MapReduce - [issue]
...This is a hold over from HADOOP-12930, dynamic sub commands.  Currently there are no unit tests for this in mapred and there really should be....    Author: Allen Wittenauer , 2018-09-01, 20:20
[MAPREDUCE-6691] move the shell code out of hadoop-mapreduce-project - MapReduce - [issue]
...We need to move the shell code out of hadoop-mapreduce-project so that we can properly build test code....    Author: Allen Wittenauer , 2018-09-01, 20:20
[MAPREDUCE-6934] is written to CWD - MapReduce - [issue]
...When using Pipes, the stream is written to the current working directory.  This is a big of a problem when running MR jobclient tests in parallel as the file is written ou...    Author: Allen Wittenauer , 2018-09-01, 20:10
[MAPREDUCE-6315] Implement retrieval of logs for crashed MR-AM via jhist in the staging directory - MapReduce - [issue]
...When all AM attempts crash, there is no record of them in JHS. Thus no easy way to get the logs. This JIRA automates the procedure by utilizing the jhist file in the staging directory....    Author: Gera Shegalov , 2018-08-30, 02:41
[MAPREDUCE-7092] MR examples to work better against cloud stores - MapReduce - [issue]
...Some of the MR examples either don't work or underperform on cloud infrastructure, all straightforward to fix. Of course, that means the cloud connectors all get an opportunity to add more i...    Author: Steve Loughran , 2018-08-29, 17:51
[MAPREDUCE-5907] Improve getSplits() performance for fs implementations that can utilize performance gains from recursive listing - MapReduce - [issue]
...FileInputFormat (both mapreduce and mapred implementations) use recursive listing while calculating splits. They however do this by doing listing level by level. That means to discover files...    Author: Sumit Kumar , 2018-08-29, 17:48
[MAPREDUCE-6760] LocatedFileStatusFetcher to use listFiles(recursive) - MapReduce - [issue]
...LocatedFileStatusFetcher does parallelized path listing, but it does make recursive calls on every subdir.If we could switch it to use FileSystem.listFiles(recursive), object stores that hav...    Author: Steve Loughran , 2018-08-29, 17:47
[MAPREDUCE-7091] Speed up terasort on S3a - MapReduce - [issue]
...Terasort is very slow on S3, because it still uses the classic rename-to-commit algorithm on the sort, even while teragen and the reporting can use the new committerReason: org.apache.hadoop...    Author: Steve Loughran , 2018-08-29, 17:38
[MAPREDUCE-7132] Check erasure coding in JobSplitWriter to avoid warnings - MapReduce - [issue]
...Currently, JobSplitWriter compares the number of hosts for a certain block against a static value that comes from mapreduce.job.max.split.locations.However, an EC shema like RS-10-4 requires...    Author: Peter Bacsko , 2018-08-29, 11:26
[MAPREDUCE-6654] Possible NPE in JobHistoryEventHandler#handleEvent - MapReduce - [issue]
...I have seen NPE thrown from JobHistoryEventHandler#handleEvent:2016-03-14 16:42:15,231 INFO [Thread-69] org.apache.hadoop.service.AbstractService: Service JobHistoryEventHandler failed in st...    Author: Xiao Chen , 2018-08-29, 06:09