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[MAPREDUCE-5881] Create counters that count how many bytes of data were read from a local node and a local rack - MapReduce - [issue]
...MapReduce provides the counters "org.apache.hadoop.mapreduce.JobCounter DATA_LOCAL_MAPS" and "org.apache.hadoop.mapreduce.JobCounter RACK_LOCAL_MAPS" that count how many local map tasks were...
http://issues.apache.org/jira/browse/MAPREDUCE-5881    Author: Adam Kawa, 2014-05-07, 11:16
Re: multinode hadoop cluster on vmware - MapReduce - [mail # user]
...Maybe you can try Serengeti http://www.projectserengeti.org/ or Vagrant ( http://java.dzone.com/articles/setting-hadoop-virtual-cluster, http://blog.cloudera.com/blog/2013/04/how-to-use-vagr...
   Author: Adam Kawa, 2013-12-18, 21:23
Re: hadoop fs -text OutOfMemoryError - MapReduce - [mail # user]
...Hi,  What is the value of HADOOP_CLIENT_OPTS in you hadoop-env.sh file?  We had similar problems with running OOM with hadoop fs command (I do not remember if they were exactly rel...
   Author: Adam Kawa, 2013-12-13, 21:24
Re: how to corrupt a replica of a block by manually? - MapReduce - [mail # user]
...Hmmm.. I guess that you can try to read this file using  $ hadoop fs -cat  to detect that  When reading a file its checksums are calculated and compared to checksums that were...
   Author: Adam Kawa, 2013-12-12, 01:41
Re: secondary namenode is hang at post - MapReduce - [mail # user]
...It looks that it can not copy the new checkpoint into the NameNode. Can you copy-past what jstack says?  $ sudo -u hdfs jstack     2013/12/11 Patai Sangbutsarakum  ...
   Author: Adam Kawa, 2013-12-11, 22:40
Re: issue about Shuffled Maps in MR job summary - MapReduce - [mail # user]
...time ?  Apart from valid information that Yong wrote in the previous point, please note that:  1) You do not want to have very shortly lived (seconds) reduce tasks, because the ove...
   Author: Adam Kawa, 2013-12-11, 22:30
[expand - 1 more] - Re: Why is Hadoop always running just 4 tasks? - MapReduce - [mail # user]
...I am not sure if Hadoop detects that. I guess that it will run one map tasks for them. Please let me know, if I am wrong.   2013/12/11 Dror, Ittay  ...
   Author: Adam Kawa, 2013-12-11, 19:46
Re: Job stuck in running state on Hadoop 2.2.0 - MapReduce - [mail # user]
...I am glad that I could help.  In our case, we followed mostly the configuration from here: http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/ClusterSetup.html (cha...
   Author: Adam Kawa, 2013-12-11, 19:24
Re: how to handle the corrupt block in HDFS? - MapReduce - [mail # user]
...I have only 1-node cluster, so I am not able to verify it when replication factor is bigger than 1.  I run the fsck on a file that consists of 3 blocks, and 1 block has a corrupt replic...
   Author: Adam Kawa, 2013-12-11, 18:33
[expand - 1 more] - Re: Setting the HADOOP_HOME_DIR - MapReduce - [mail # user]
...Sure! Hope that my previous post answers your question ;)   2013/12/8 Forrest Aldrich  ...
   Author: Adam Kawa, 2013-12-08, 23:08
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