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[expand - 2 more] - RE: starting Daemons remotely, through ssh - SOLVED - MapReduce - [mail # user]
...Forrest,  I must admit. I am very new myself.  Two months ago I didn't know what "$sudo" was. :) So, do not take my comments too seriously. I could be wrong about many issues. &nbs...
   Author: Kartashov, Andy, 2012-11-06, 20:46
cluster set-up / directory structure or something that I was originally confused about - MapReduce - [mail # user]
...Hadoopers,  Last month I asked question 2 and this is what I have recently learned.  If you decide to overwrite Hadoop default directories (recommended) this is what to keep in min...
   Author: Kartashov, Andy, 2012-11-06, 15:22
incompatible cluster ID  - SOLUTION - MapReduce - [mail # user]
...Hello,  Whenever you are getting below error, trying to start a DN on a slave machine:  java.io.IOException: Incompatible clusterIDs in /home/hadoop/dfs/data: namenode clusterID = ...
   Author: Kartashov, Andy, 2012-11-06, 14:36
RE: Error: org.apache.hadoop.mapreduce.task.reduce.Shuffle$ShuffleError Java Heap Space - MapReduce - [mail # user]
...Your error takes place during reduce task, when temporary files are written to memory/disk. You are clearly running low on resources. Check your memory "$ free -m" and disk space "$ df -H" a...
   Author: Kartashov, Andy, 2012-11-05, 15:43
Hadoop - cluster set-up (for DUMMIES)...  or how I did it - MapReduce - [mail # user]
...Hello Hadoopers,  After weeks of struggle, numerous error debugging and the like I finally managed to set-up a fully distributed cluster. I decided to share my experience with the new c...
   Author: Kartashov, Andy, 2012-11-02, 16:35
RE: jobtracker page @50030 timeout or take very long time. - MapReduce - [mail # user]
...... another thought... do you happened to have some ungracefully  terminated jobs still running in the background.. Try "hadoop job -list"  Sometimes, when I hardstop a job  a...
   Author: Kartashov, Andy, 2012-11-02, 14:02
RE: Map Reduce slot - MapReduce - [mail # user]
...I checked my MR admin page running on :50030:jobtracker.jsp this is what I am learning.  I run 2-core processor, so the admin page told me   that my max map/reduce slot capacity wa...
   Author: Kartashov, Andy, 2012-11-01, 20:22
[expand - 2 more] - RE: cluster set-up / a few quick questions - SOLVED - MapReduce - [mail # user]
...People,  While I did not find start-balancer.sh script on my machine I successfully  utilized the following command:  "$hadoop balancer -threshold 10" and achieved  the e...
   Author: Kartashov, Andy, 2012-11-01, 19:11
property  mapred.tasktracker.map.tasks.maximum - MapReduce - [mail # user]
...Guys,  Do you set the above property once on the master NN  in in mapred-site.xml  or on each DN/TTs.  Similarly, what about property: mapred.child.java.opts. Once on NN ...
   Author: Kartashov, Andy, 2012-10-31, 21:05
RE: error in versions - MapReduce - [mail # user]
...Yulia,  I just ran "hadoop version" on my NN, separate SNN, and three separate DNs and all point to the exact  the same build version. I know that you must install the exact same v...
   Author: Kartashov, Andy, 2012-10-31, 20:01
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