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Hadoop Classpath issue. - MapReduce - [mail # user]
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...Hi Guys, When i trying to execute hadoop fs -ls / command It's return extra two lines. 226:~# hadoop fs -ls / *common ./* *lib lib* Found 9 items drwxrwxrwx - hdfs ...
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Author: Dhanasekaran Anbalagan,
2013-05-23, 14:44
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Understand dfs.datanode.max.xcievers - MapReduce - [mail # user]
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...Hi Guys, We are having few data nodes in an inconsistent state. frequently goes dead state. Because of DataXceiver Error In console we seen the Error. *INFO hdfs.DFSClient:...
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Author: Dhanasekaran Anbalagan,
2013-03-17, 13:12
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DataXceiver error processing WRITE_BLOCK operation src: /x.x.x.x:50373 dest: /x.x.x.x:50010 - MapReduce - [mail # user]
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...Hi Guys I am frequently getting is error in my Data nodes. Please guide what is the exact problem this. dvcliftonhera138:50010:DataXceiver error processing WRITE_BLOCK ope...
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Author: Dhanasekaran Anbalagan,
2013-03-08, 07:45
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What is Block Pool ID namenode? - MapReduce - [mail # user]
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...Hi Guys, In my node namenode page I seen Started:Wed Feb 27 12:41:28 EST 2013 Version:2.0.0-cdh4.0.1, 4d98eb718ec0cce78a00f292928c5ab6e1b84695 Compiled:Mon Sep 24 13:30:27 EDT 20...
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Author: Dhanasekaran Anbalagan,
2013-03-03, 05:48
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How to find Replication factor for one perticular folder in HDFS - MapReduce - [mail # user]
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...Hi Guys, How to query particular folder witch replication factor configured. In my cluster some folder in HDFS configured 2 and some of them configured as three. How to query. pl...
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Author: Dhanasekaran Anbalagan,
2013-02-25, 17:06
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How to start Data Replicated Blocks in HDFS manually. - MapReduce - [mail # user]
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...Hi Guys, We have cluster with two data nodes. We configured data replication factor two. when i copy data to hdfs, Data's are not fully replicated. It's says * Number of Un...
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Author: Dhanasekaran Anbalagan,
2013-02-25, 14:15
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How to understand DataNode usages ? - MapReduce - [mail # user]
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...Hi Guys, In Datanode UI page they give Datanode usage. what does actually mean, Please guide me Min, Median, stdev DataNodes usages:Min %Median %Max %stdev % ...
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Author: Dhanasekaran Anbalagan,
2013-02-14, 09:12
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Re: Documentation Link is broken on - MapReduce - [mail # user]
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...Not Found The requested URL /docs/r0.20.2/ was not found on this server. Apache/2.4.3 (Unix) OpenSSL/1.0.0g Server at hadoop.apache.org Port 80 Did I learn something today? If no...
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Author: Dhanasekaran Anbalagan,
2013-02-14, 08:59
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Performance issue in CDH4.0.1 with 32 core machine. - MapReduce - [mail # user]
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...Hi Guys, We are running hadoop cluster with Intel xeon 32 core machine, 64 GB Ram, 8x3TB HDD, we are using CDH4.0.1, we regularly monitoring machine, we have configured 30 mappers per ...
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Author: Dhanasekaran Anbalagan,
2013-02-13, 09:21
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Decommissioning Nodes in Production Cluster. - MapReduce - [mail # user]
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...Hi Guys, It's recommenced do with removing one the datanode in production cluster. via Decommission the particular datanode. please guide me. -Dhanasekaran, Did I learn som...
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Author: Dhanasekaran Anbalagan,
2013-02-12, 11:50
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