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[MAPREDUCE-4364] Document Yarn/MR2 performance related configurations and how to tune them. - MapReduce - [issue]
...Various new configuration properties have been introduced in Yarn/MR2. It will be nice to create a document highlighting what configurations are crucial for optimal performance and how such ...
http://issues.apache.org/jira/browse/MAPREDUCE-4364    Author: Ahmed Radwan, 2012-06-23, 00:13
[MAPREDUCE-3493] Add the default mapreduce.shuffle.port property to mapred-default.xml - MapReduce - [issue]
...I faced this issue when trying to run multiple Hadoop MR2 instances on the same node. The default value for this property is hardcoded in the ShuffleHandler.java class so it results in port ...
http://issues.apache.org/jira/browse/MAPREDUCE-3493    Author: Ahmed Radwan, 2012-05-30, 14:04
[MAPREDUCE-4284] Allow setting yarn.nodemanager.delete.debug-delay-sec on a per-job basis - MapReduce - [issue]
...The yarn.nodemanager.delete.debug-delay-sec property is helpful in debugging jobs (inspecting container logs/local dirs after the job finishes). Currently it is a nodemanager property and ch...
http://issues.apache.org/jira/browse/MAPREDUCE-4284    Author: Ahmed Radwan, 2012-05-25, 23:40
[MAPREDUCE-4276] Allow setting yarn.nodemanager.delete.debug-delay-sec property to "-1" for easier container debugging. - MapReduce - [issue]
...Allow setting yarn.nodemanager.delete.debug-delay-sec property to "-1" to have it never clear (like older TT time)....
http://issues.apache.org/jira/browse/MAPREDUCE-4276    Author: Ahmed Radwan, 2012-05-24, 05:28
[MAPREDUCE-3933] Failures because MALLOC_ARENA_MAX is not set - MapReduce - [issue]
...We have noticed a bunch of MapReduce test failures on CentOS 6 due to "running beyond virtual memory limits".These tests fail with messages of the form:[Node Status Updater] nodemanager.Node...
http://issues.apache.org/jira/browse/MAPREDUCE-3933    Author: Ahmed Radwan, 2012-05-23, 20:28
[MAPREDUCE-4129] Lots of unneeded counters log messages - MapReduce - [issue]
...Huge number of the same WARN messages are written. We only need to write each distinct message once. The messages are of the form:2012-04-05 03:55:04,166 WARN mapreduce.Counters: Group {oldG...
http://issues.apache.org/jira/browse/MAPREDUCE-4129    Author: Ahmed Radwan, 2012-05-23, 20:28
[MAPREDUCE-4105] Yarn RackResolver ignores rack configurations - MapReduce - [issue]
...Incorrect mappings because the Yarn RackResolver ignores rack configurations. This can be verified by inspecting the resource manager web ui that lists all the nodes, all of them show up wit...
http://issues.apache.org/jira/browse/MAPREDUCE-4105    Author: Ahmed Radwan, 2012-04-10, 14:03
[MAPREDUCE-3409] Incorrect custom task status when running on MR2 - MapReduce - [issue]
...To reproduce this problem:1- In your mapper setup() set: context.setStatus("myStatus")2- When the job finishes:TaskReport[] reports = job.getTaskReports(TaskType.MAP);assertEquals("myStatus"...
http://issues.apache.org/jira/browse/MAPREDUCE-3409    Author: Ahmed Radwan, 2012-04-09, 23:53
[MAPREDUCE-4070] JobHistoryServer creates /tmp directory with restrictive permissions if the directory doesn't already exist. - MapReduce - [issue]
...Starting up the MapReduce JobhHistoryServer service after a clean install appears to automatically create the /tmp directory on HDFS. However, it is created with 750 permission.Attempting to...
http://issues.apache.org/jira/browse/MAPREDUCE-4070    Author: Ahmed Radwan, 2012-04-02, 10:28
[MAPREDUCE-4090] Branch 1 pipes doesn't work on MR2 clusters - MapReduce - [issue]
...If I compile pipes examples on branch 1: ant -Dcompile.c++=yes examplesAnd then try to run it on an MR2 cluster, the pipes job hangs forever at map 0% reduce 0%, I can see in the maps stderr...
http://issues.apache.org/jira/browse/MAPREDUCE-4090    Author: Ahmed Radwan, 2012-03-30, 21:43
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