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Re: XML parsing in Hadoop - MapReduce - [mail # user]
...Hi,  Here this map() function will be called for every (key,value) pair (i.e. for every line of split in your Job because of TextInputFormat). This xml parsing code which you have writt...
   Author: Devaraj K, 2013-11-28, 08:09
Re: default capacity scheduler only one job in running status - MapReduce - [mail # user]
...Could you check the below configuration in capacity-scheduler.xml, whether is it causing to run only one AM.       yarn.scheduler.capacity.maximum-am-resource-percent   &...
   Author: Devaraj K, 2013-11-26, 09:35
[MAPREDUCE-5622] MRAppMaster doesn't assign all allocated NODE_LOCAL containers to node-local maps - MapReduce - [issue]
...MRAppMaster will request containers for all the splits to launch map tasks, RM will give Node Local containers for all these if available. When the RM gives all containers as Node Local, MR ...
http://issues.apache.org/jira/browse/MAPREDUCE-5622    Author: Devaraj K, 2013-11-13, 15:40
[MAPREDUCE-5174] Job History server gives wrong no of total maps and reducers - MapReduce - [issue]
...History server displays wrong no of total maps and total reducers in JHS UI Job listing for non-succeeded jobs and also REST API (i.e http://<job history ip><port>/ws/v1/history/...
http://issues.apache.org/jira/browse/MAPREDUCE-5174    Author: Devaraj K, 2013-08-05, 08:05
[MAPREDUCE-5422] [Umbrella] Fix invalid state transitions in MRAppMaster - MapReduce - [issue]
...There are mutiple invalid state transitions for the state machines present in MRAppMaster. All these can be handled as part of this umbrell JIRA....
http://issues.apache.org/jira/browse/MAPREDUCE-5422    Author: Devaraj K, 2013-07-26, 12:49
RE: Get the history info in Yarn - MapReduce - [mail # user]
...Hi,         You can get all the details for Job using this mapred command         For this you need to have Job History Server Running and the same jo...
   Author: Devaraj K, 2013-06-13, 05:41
[MAPREDUCE-4743] Job is marking as FAILED and also throwing the Transition exception instead of KILLED when issues a KILL command - MapReduce - [issue]
...org.apache.hadoop.yarn.state.InvalidStateTransitonException: Invalid event: T_KILL at SUCCEEDED at org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:301)...
http://issues.apache.org/jira/browse/MAPREDUCE-4743    Author: Devaraj K, 2013-06-07, 13:06
[MAPREDUCE-5195] Job doesn't utilize all the available cluster resources with CombineFileInputFormat - MapReduce - [issue]
...If we enable delay scheduling in capacity scheduler and the submitted job is using CombineFileInputFormat then this job is not able to use the all the available resources in the cluster, run...
http://issues.apache.org/jira/browse/MAPREDUCE-5195    Author: Devaraj K, 2013-04-30, 14:24
[MAPREDUCE-3232] AM should  handle reboot from Resource Manager - MapReduce - [issue]
...When the RM doesn't have last response id for app attempt(or the request response id is less than the last response id), RM sends reboot response but AM doesn't handle this....
http://issues.apache.org/jira/browse/MAPREDUCE-3232    Author: Devaraj K, 2013-01-17, 13:14
[MAPREDUCE-3556] Resource Leaks in key flows - MapReduce - [issue]
...MapTask.java   if (combinerRunner == null || numSpills < minSpillsForCombine) {            Merger.writeFile(kvIter, writer, reporter, job...
http://issues.apache.org/jira/browse/MAPREDUCE-3556    Author: Devaraj K, 2013-01-17, 13:12
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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