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[MAPREDUCE-474] ability to report numeric progress within a particular key
...I'd like some mechanism to report numeric progress in maps that have side effects. In the common case, there is exactly one key/value for each map and they do a lot of work (minutes to hours...
, 2012-01-16, 09:09
[MAPREDUCE-239] Attribute to mark Mappers and Reducers as side-effect free
...There should be an annotation to mark Mapper and Reducer classes as side-effect free. This annotation could then be used to disable speculative execution for such classes. Furthermore, defin...
, 2012-01-16, 08:58
[MAPREDUCE-80] Counter formatting for the user logs should be pulled out of the public Counters API
...Currently the mapred.Counters class includes an obsolete format (makeCompactString) and a format that is only used by the user logs (makeEscapeCompactString). makeCompactString should be dep...
, 2011-12-31, 09:56
[MAPREDUCE-58] Duplicate metric name getTask
...I've been seeing the following error in some tasks:org.apache.hadoop.ipc.RemoteException: java.io.IOException: java.lang.IllegalArgumentException: Duplicate metricsName:getTask ...
, 2011-12-31, 09:40
[MAPREDUCE-39] Task tracker should wait for the process to exit before declaring the task successful or failed.
...Currently when a task declares it is done, the status in the task tracker is changed immediately. Instead it should wait for the subprocess to actually be done before it moves to one of the ...
, 2011-12-31, 09:26
[MAPREDUCE-42] task trackers should not restart for having a late heartbeat
...TaskTrackers should not close and restart themselves for having a late heartbeat. The JobTracker should just accept their current status....
, 2011-12-31, 09:21
[MAPREDUCE-26] The shuffle keeps the ReduceTask locked while doing a FileSystem.rename leading to task timeouts
...The shuffle in ReduceTask.ReduceCopier.MapOutputCopier.copyOutput locks the entire ReduceTask while doing a FileSystem.rename operation. Unfortunately the RawLocalFileSystem implements renam...
, 2011-12-31, 09:10
[MAPREDUCE-1932] record skipping doesn't work with the new map/reduce api
...The new HADOOP-1230 map/reduce api doesn't support the record skipping features....
, 2011-12-19, 15:01
[MAPREDUCE-231] Split map/reduce into sub-project
, 2011-12-12, 06:19
[MAPREDUCE-1566] Need to add a mechanism to import tokens and secrets into a submitted job.
...We need to include tokens and secrets into a submitted job. I propose adding a configuration attribute that when pointed at a token storage file will include the tokens and secrets from that...
, 2011-12-12, 06:19
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