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[MAPREDUCE-4662] JobHistoryFilesManager thread pool never expands - MapReduce - [issue]
...The job history file manager creates a threadpool with core size 1 thread, max pool size 3.   It never goes beyond 1 thread though because its using a LinkedBlockingQueue which doesn't ...
http://issues.apache.org/jira/browse/MAPREDUCE-4662    Author: Thomas Graves, 2014-12-16, 20:15
[MAPREDUCE-4815] FileOutputCommitter.commitJob can be very slow for jobs with many output files - MapReduce - [issue]
...If a job generates many files to commit then the commitJob method call at the end of the job can take minutes.  This is a performance regression from 1.x, as 1.x had the tasks commit di...
http://issues.apache.org/jira/browse/MAPREDUCE-4815    Author: Jason Lowe, 2014-12-16, 18:40
[MAPREDUCE-6191] TestJavaSerialization fails with getting incorrect MR job result - MapReduce - [issue]
...TestJavaSerialization#testMapReduceJob() fails with getting incorrect MR job result:"junit.framework.ComparisonFailure: expected:<[a ]1> but was:<[0 1]1>"...
http://issues.apache.org/jira/browse/MAPREDUCE-6191    Author: sam liu, 2014-12-16, 18:26
[MAPREDUCE-6166] Reducers do not validate checksum of map outputs when fetching directly to disk - MapReduce - [issue]
...In very large map/reduce jobs (50000 maps, 2500 reducers), the intermediate map partition output gets corrupted on disk on the map side. If this corrupted map output is too large to shuffle ...
http://issues.apache.org/jira/browse/MAPREDUCE-6166    Author: Eric Payne, 2014-12-16, 18:12
[MAPREDUCE-6193] Hadoop 2.x MapReduce Job Counter Data Local Maps Lower than Hadoop 1.x - MapReduce - [issue]
...I run the MapReduce job at 400+ node of cluster based on Hadoop 2.4.0 confined scheduer is FairScheduer and I noticed Job Counter of Data-Local is much lower than Hadoop 1.x Such as these si...
http://issues.apache.org/jira/browse/MAPREDUCE-6193    Author: Xu Chen, 2014-12-16, 08:11
[MAPREDUCE-5756] CombineFileInputFormat.getSplits() including directories in its results - MapReduce - [issue]
...Trying to track down HIVE-6401, where we see some "is not a file" errors because getSplits() is giving us directories.  I believe the culprit is FileInputFormat.listStatus():  ...
http://issues.apache.org/jira/browse/MAPREDUCE-5756    Author: Jason Dere, 2014-12-16, 03:02
[MAPREDUCE-6196] Fix BigDecimal ArithmeticException in PiEstimator - MapReduce - [issue]
...Certain combinations of arguments to PiEstimator cause the following exception:java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result. at jav...
http://issues.apache.org/jira/browse/MAPREDUCE-6196    Author: Ray Chiang, 2014-12-16, 01:57
[MAPREDUCE-6197] Cache MapOutputLocations in ShuffleHandler - MapReduce - [issue]
...ShuffleHandler currently seems to create a map of mapId - mapInfo (file.out / index information) when it receives a message.This should be caching map info across requests, so that the a sca...
http://issues.apache.org/jira/browse/MAPREDUCE-6197    Author: Siddharth Seth, 2014-12-16, 01:08
[MAPREDUCE-5960] JobSubmitter's check whether job.jar is local is incorrect with no authority in job jar path. - MapReduce - [issue]
...$ mapred job -submit myjob.xml 2014-07-06 15:06:34.731 java[12120:1903] Unable to load realm info from SCDynamicStore14/07/06 15:06:34 WARN util.NativeCodeLoader: Unable to load native-hadoo...
http://issues.apache.org/jira/browse/MAPREDUCE-5960    Author: Gera Shegalov, 2014-12-15, 23:06
[MAPREDUCE-6195] AM UI does not show splits/locality info - MapReduce - [issue]
...The AM UI currently shows the tasks without indicating the locality or speculation of a task.This information is available by reading it out of the logs later, but while tracking a slow/stra...
http://issues.apache.org/jira/browse/MAPREDUCE-6195    Author: Gopal V, 2014-12-15, 17:18
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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