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[expand - 1 more] - Re: hadoop v0.23.9, namenode -format command results in Could not find or load main class org.apache.hadoop.hdfs.server.namenode.NameNode - Hadoop - [mail # user]
...thanks, i also tried using HADOOP_PREFIX but that didn't work. I still get the same error:  Could not find or load main class org.apache.hadoop.hdfs.server.namenode.NameNode  btw, ...
   Author: Jane Wayne, 2013-08-12, 14:31
[expand - 6 more] - Re: how to get the time of a hadoop cluster, v0.20.2 - Hadoop - [mail # user]
...and please remember, i stated that although the hadoop cluster uses NTP, the "server" (the machine that is not a part of the hadoop cluster) cannot assume to be using NTP (and in fact, doesn...
   Author: Jane Wayne, 2013-05-17, 14:13
[expand - 1 more] - Re: how to resolve conflicts with jar dependencies - Hadoop - [mail # user]
...thanks luke. that was informative.  unfortunately for me, we are still on hadoop v0.20.2.  if you or anyone still have any feedback, given the new information, on how to resolve de...
   Author: Jane Wayne, 2013-03-13, 15:19
Re: reg hadoop on AWS - Hadoop - [mail # user]
...i'm on windows using AWS EMR/EC2. i use the ruby client to manipulate AWS EMR.  1. spawn an EMR cluster. this should return a jobflow id (jobflow-id).  ruby elastic-mapreduce --cre...
   Author: Jane Wayne, 2012-10-05, 14:31
Re: Hadoop on physical Machines compared to Amazon Ec2 / virtual machines - Hadoop - [mail # user]
...Sandeep,  How are you guys moving 100 TB into the AWS cloud? Are you using S3 or EBS? If you are using S3, it does not work like HDFS. Although data is replicated (I believe within an a...
   Author: Jane Wayne, 2012-06-01, 08:23
[expand - 1 more] - Re: how do i view the local file system output of a mapper on cygwin + windows? - Hadoop - [mail # user]
...i found out what my problem was. apparently, when you iterate over Iterable values, that instance of Type is being used over and over. for example, in my reducer,  public void reduce(Ke...
   Author: Jane Wayne, 2012-04-06, 00:56
[expand - 2 more] - Re: how to fine tuning my map reduce job that is generating a lot of intermediate key-value pairs (a lot of I/O operations) - Hadoop - [mail # user]
...serge, i specify 15 instances, but only 14 end up being data/tasks nodes. 1 instance is reserved as the name node (job tracker).  On Wed, Apr 4, 2012 at 1:17 PM, Serge Blazhievsky  ...
   Author: Jane Wayne, 2012-04-05, 03:15
[expand - 1 more] - Re: how to unit test my RawComparator - Hadoop - [mail # user]
...chris,  1. thanks, that approach to converting my custom key to byte[] works.  2. on the issue of pass by reference or pass by value, (it's been a while since i've visited this iss...
   Author: Jane Wayne, 2012-04-01, 05:32
[expand - 1 more] - Re: what is the code for WritableComparator.readVInt and WritableUtils.decodeVIntSize doing? - Hadoop - [mail # user]
...chris,  thanks. i see now.  internally, i use String instead of Text and so I use WritableUtils.writeString(...) and not Text.write(...). in the latter method, i see that it calls ...
   Author: Jane Wayne, 2012-04-01, 03:19
[expand - 1 more] - Re: where are my logging output files going to? - Hadoop - [mail # user]
...what do you mean by an edge node? do you mean any node that is not the master node (or NameNode or JobTracker node)?  On Wed, Mar 28, 2012 at 3:51 AM, Michel Segel wrote:  ...
   Author: Jane Wayne, 2012-03-28, 08:29
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