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Vince Allen replied on August 28, 2009 23:44 to the question "Balancer wont start" in Cloudera:
I believe it is 0.8. I had used Cloudera's EC2 ami distro 20090623.
Very little was changed in hadoop-site.xml aside from some changes to mapred.map.tasks and mapred.reduce.tasks.
Vince-
Vince Allen replied on August 28, 2009 23:11 to the question "Balancer wont start" in Cloudera:
Hi Alex,
Yes, I can access the hdfs locations with fsShell. And had ran the example jar when I first created the cluster.
I will try the example again.
Vince -
Vince Allen asked a question in Cloudera on August 28, 2009 18:49:
Balancer wont startHi,
I am a hadoop newbie and currently have a running cluster that has had new nodes added to it.
I want to balance but the balancer is failing. I get the following:
# hadoop balancer
09/08/28 14:48:05 ERROR dfs.Balancer: java.lang.NullPointerException
at org.apache.hadoop.dfs.Balancer.run(Balancer.java:1458)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.dfs.Balancer.main(Balancer.java:791)
I have googled this but there is nothing distinct about the error.
Does anyone know why this is happening ?
Vince Allen -
Vince Allen replied on July 30, 2009 19:57 to the question "Why does hadoop-ec2 not work" in Cloudera:
Thanks Phil!
I was able to get simplejson install using 'yum install python-simplejson'
hadoop-ec2 now works.
Thanks again!
Vince -
Vince Allen asked a question in Cloudera on July 30, 2009 19:32:
Why does hadoop-ec2 not workI am having trouble getting hadoop-ec2 to work. after runnimg clouders'a AMI for Fedora I ran through all the instructions on cloudera.com/hadoop-ec2 but when I test hadoop-ec2 i get:
Traceback (most recent call last):
File "/root/bin/hadoop-ec2", line 21, in <module>
from hadoop.ec2.commands import *
File "/root/bin/hadoop/ec2/commands.py", line 22, in <module>
from hadoop.ec2.storage import Storage
File "/root/bin/hadoop/ec2/storage.py", line 19, in <module>
import simplejson as json
ImportError: No module named simplejson
What am I doing wrong ?
Vince</module></module></module>
