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[MAPREDUCE-5227] JobTrackerMetricsSource and QueueMetrics should standardize naming rules - MapReduce - [issue]
...JobTrackerMetricsSource and QueueMetrics provides users with some metrics, but its naming rules( "jobs_running", "running_maps", "running_reduces") sometimes confuses users. It should be sta...
http://issues.apache.org/jira/browse/MAPREDUCE-5227    Author: Tsuyoshi Ozawa, 2015-05-02, 19:28
[MAPREDUCE-5225] SplitSampler in mapreduce.lib should use a SPLIT_STEP to jump around splits - MapReduce - [issue]
...Now, SplitSampler only samples the first maxSplitsSampled splits, caused by MAPREDUCE-1820. However, jumping around all splits is in general preferable than the first N splits....
http://issues.apache.org/jira/browse/MAPREDUCE-5225    Author: Zhijie Shen, 2015-05-02, 19:27
[MAPREDUCE-4487] Reduce job latency by removing hardcoded sleep statements - MapReduce - [issue]
...There are a few places in MapReduce where there are hardcoded sleep statements. By replacing them with wait/notify or similar it's possible to reduce latency for short running jobs....
http://issues.apache.org/jira/browse/MAPREDUCE-4487    Author: Tom White, 2015-05-02, 19:24
[MAPREDUCE-5499] Fix synchronization issues of the setters/getters of *PBImpl which take in/return lists - MapReduce - [issue]
...Similar to YARN-609. There're the following *PBImpls which need to be fixed:1. GetDiagnosticsResponsePBImpl2. GetTaskAttemptCompletionEventsResponsePBImpl3. GetTaskReportsResposnePBImpl4. Co...
http://issues.apache.org/jira/browse/MAPREDUCE-5499    Author: Zhijie Shen, 2015-05-02, 18:40
[MAPREDUCE-5374] CombineFileRecordReader does not set "map.input.*" configuration parameters for first file read - MapReduce - [issue]
...The CombineFileRecordReader operates on splits consisting of multiple files. Each time a new record reader is initialised for a "chunk", certain parameters are supposed to be set on the conf...
http://issues.apache.org/jira/browse/MAPREDUCE-5374    Author: Dave Beech, 2015-05-02, 18:35
[MAPREDUCE-5203] Make AM of M/R Use NMClient - MapReduce - [issue]
...YARN-422 adds NMClient. AM of mapreduce should use it instead of using the raw ContainerManager proxy directly. ContainerLauncherImpl needs to be changed....
http://issues.apache.org/jira/browse/MAPREDUCE-5203    Author: Zhijie Shen, 2015-05-02, 17:49
[MAPREDUCE-6345] Documentation fix for when CRLA is enabled for MRAppMaster logs - MapReduce - [issue]
...CRLA is enabled for the ApplicationMaster when both yarn.app.mapreduce.am.container.log.limit.kb (not mapreduce.task.userlog.limit.kb) and yarn.app.mapreduce.am.container.log.backups are gre...
http://issues.apache.org/jira/browse/MAPREDUCE-6345    Author: Rohit Agarwal, 2015-05-02, 16:34
[MAPREDUCE-3115] OOM When the value for the property "mapred.map.multithreadedrunner.class" is set to MultithreadedMapper instance. - MapReduce - [issue]
...When we set the value for the property mapred.map.multithreadedrunner.class as instance of MultithreadedMapper, using MultithreadedMapper.setMapperClass(), it simply throws IllegalArgumentEx...
http://issues.apache.org/jira/browse/MAPREDUCE-3115    Author: Bhallamudi Venkata Siva K..., 2015-05-02, 13:09
[MAPREDUCE-4840] Delete dead code and deprecate public API related to skipping bad records - MapReduce - [issue]
...It looks like the decision was made in MAPREDUCE-1932 to remove support for skipping bad records rather than fix it (it doesn't work right now in trunk). If that's the case then we should pr...
http://issues.apache.org/jira/browse/MAPREDUCE-4840    Author: Mostafa Elhemali, 2015-05-02, 13:05
[MAPREDUCE-2632] Avoid calling the partitioner when the numReduceTasks is 1. - MapReduce - [issue]
...We can avoid the call to the partitioner when the number of reducers is 1.This will avoid the unnecessary computations by the partitioner....
http://issues.apache.org/jira/browse/MAPREDUCE-2632    Author: Ravi Teja Ch N V, 2015-05-02, 11:33
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB