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[MAPREDUCE-6135] Job staging directory remains if MRAppMaster is OOM - MapReduce - [issue]
...If MRAppMaster attempts run out of memory, it won't go through the normal job clean up process to move history files to history server location. When customers try to find out why the job fa...
http://issues.apache.org/jira/browse/MAPREDUCE-6135    Author: Ming Ma, 2014-10-23, 22:36
[MAPREDUCE-5835] Killing Task might cause the job to go to ERROR state - MapReduce - [issue]
...There could be a race condition if job is killed right after task attempt receives TA_DONE event. In that case, TaskImpl might receive T_ATTEMPT_SUCCEEDED followed by T_ATTEMPTED_KILLED for ...
http://issues.apache.org/jira/browse/MAPREDUCE-5835    Author: Ming Ma, 2014-09-04, 02:12
[MAPREDUCE-5783] web UI update to allow people to request thread dump of a running task. - MapReduce - [issue]
...This depends on https://issues.apache.org/jira/browse/YARN-445....
http://issues.apache.org/jira/browse/MAPREDUCE-5783    Author: Ming Ma, 2014-04-03, 09:37
[MAPREDUCE-5784] CLI update so that people can send signal to a specific task - MapReduce - [issue]
...This depends on https://issues.apache.org/jira/browse/YARN-445. MR client will first find out the container id for the specified task. Then it will use YARN API to signal the container....
http://issues.apache.org/jira/browse/MAPREDUCE-5784    Author: Ming Ma, 2014-03-08, 07:28
[MAPREDUCE-5776] Improve TaskAttempt's handling of TA_KILL event when TA is in SUCCESS_CONTAINER_CLEANUP state - MapReduce - [issue]
...In most states that a TaskAttempt goes through, such as ASSIGNED, RUNNING, SUCCEEDED etc. If a TA receives TA_KILL, the state will transit to KILLED (if the TA is in SUCCEEDED state, it depe...
http://issues.apache.org/jira/browse/MAPREDUCE-5776    Author: Ming Ma, 2014-03-04, 18:54
[MAPREDUCE-2779] JobSplitWriter.java can't handle large job.split file - MapReduce - [issue]
...We use cascading MultiInputFormat. MultiInputFormat sometimes generates big job.split used internally by hadoop, sometimes it can go beyond 2GB.In JobSplitWriter.java, the function that gene...
http://issues.apache.org/jira/browse/MAPREDUCE-2779    Author: Ming Ma, 2012-08-15, 09:09
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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