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Hadoop on Tomcat issue ?? - Hadoop - [mail # user]
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...Hello users, I am trying to create a Hadoop WAR file, which will be deployed on Tomcat. My code as a JAR is running perfectly fine. But when I am deploying as WAR on tomcat, I am getti...
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Author: praveenesh kumar,
2012-11-23, 10:54
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Measuring Shuffle time for MR job - Hadoop - [mail # user]
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...Is there a way to know the total shuffle time of a map-reduce job - I mean some command or output that can tell that ? I want to measure total map, total shuffle and total reduce...
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Author: praveenesh kumar,
2012-08-27, 06:18
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Re: Dealing with low space cluster - Hadoop - [mail # user]
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...@Harsh --- I was wondering...although it doesn't make much/any sense --- if a person wants to store the files only on HDFS (something like a backup) consider the above hardware scenari...
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Author: praveenesh kumar,
2012-06-14, 13:53
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Re: Dealing with low space cluster - Hadoop - [mail # user]
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...I don't know whether this will work or not.. but you can give it a shot..(I am assuming you are having 8 nodes as hadoop cluster) 1. Mount 1 TB hard disk to one of the DN. 2. Put it to...
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Author: praveenesh kumar,
2012-06-14, 08:36
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Re: Trying to put 16gb file onto hdfs - Hadoop - [mail # user]
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...Check your Datanode logs.. or do "hadoop fsck /" or "hadoop dfsadmin -report" to get more details about your HDFS. Seems like DN is down. Regards, Praveenesh On Tue, Jun 5, 2012 ...
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Author: praveenesh kumar,
2012-06-05, 05:17
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Re: What happens when I do not output anything from my mapper - Hadoop - [mail # user]
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...You can control your map outputs based on any condition you want. I have done that - it worked for me. It could be your code problem that its not working for you. Can you please share your m...
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Author: praveenesh kumar,
2012-06-04, 12:27
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Re: SecondaryNameNode not connecting to NameNode : PriviledgedActionException - Hadoop - [mail # user]
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...Its trying to connect to your NN on port 50030.. I think it should be 50070. In your hdfs-site.xml -- for dfs.http.address -- I am assuming you have given hadoop01:50070, right ? Regar...
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Author: praveenesh kumar,
2012-06-04, 12:24
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Re: Hadoop cluster hardware configuration - Hadoop - [mail # user]
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...On a very high level... we would be utilizing cluster not only for hadoop but for other I/O bound or in-memory operations. That is the reason we are going for SAS hard disks. And we also nee...
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Author: praveenesh kumar,
2012-06-04, 12:22
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Re: SecondaryNameNode not connecting to NameNode : PriviledgedActionException - Hadoop - [mail # user]
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...I would say not to use 127.0.0.1 in distributed mode. Comment out the first 2 lines of your /etc/hosts. Rather have your /etc/hosts file like this - Suppose you are on hadoop00 -...
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Author: praveenesh kumar,
2012-06-04, 12:17
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Re: SecondaryNameNode not connecting to NameNode : PriviledgedActionException - Hadoop - [mail # user]
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...Also can you share your /etc/hosts file of both the VMs Regards, Praveenesh On Mon, Jun 4, 2012 at 5:35 PM, wrote: ...
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Author: praveenesh kumar,
2012-06-04, 12:08
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