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35 discussions - 138 posts

  • Hello, I want to ask if there is an implementation of Hadoop for perl...or something similar to Hadoop for python Thank you --------------------------------- Χρησιμοποιείτε Yahoo! Βαρεθήκατε τα ...
    Andreas PapadakisAndreas Papadakis
    Mar 23, 2007 at 7:52 pm
    Mar 28, 2007 at 4:31 pm
  • Hi Everyone! I am new user to Hadoop and trying to set up a small cluster using Hadoop. but I am facing some issues doing that. I am trying to run the Hadoop 'wordcount' example program which come ...
    Gaurav AgarwalGaurav Agarwal
    Mar 7, 2007 at 8:23 am
    Mar 8, 2007 at 6:38 am
  • Hi Hadoop-Users..... Have anyone successfully tried running hadoop in two systems? I've tried running the wordcount example in one system.. It works fine... But when i try to add nodes to the cluster ...
    JaylacJaylac
    Mar 2, 2007 at 7:47 am
    Mar 5, 2007 at 4:37 am
  • Hi, I'm trying to decommission a node with hadoop-0.12.2. I use the property dfs.hosts.exclude, since the command haddop dfsadmin -decommission seems to be gone. I then start the cluster with an ...
    Espen Amble KolstadEspen Amble Kolstad
    Mar 27, 2007 at 6:50 am
    Mar 28, 2007 at 7:36 am
  • Hi Whenever i execute the bin/start-all.sh command the slave node hangs. Sometimes the master node hanga. If i restart the system and do the job, then im getting the proper output... Same problem ...
    JaylacJaylac
    Mar 23, 2007 at 3:42 am
    Mar 27, 2007 at 10:06 am
  • Hi, [I tried googling and searching the mailing list for a similar problem, but I coudn't find one this basic :] I just tried to install hadoop on a single node, a 64-bit box running Ubuntu. [tiger]$ ...
    Tiger UppercutTiger Uppercut
    Mar 26, 2007 at 7:28 am
    Mar 27, 2007 at 6:09 am
  • Hi I was just going thro abt MapReduce for my final year project work..... I got confused in the middle.... What i thought is "MapReduce deals greatly with key/value pairs only... For fitting a ...
    JaylacJaylac
    Mar 2, 2007 at 4:25 am
    Mar 3, 2007 at 4:52 am
  • Hi, When I try to scale Hadoop up to about 100 nodes on EC2 (single-cpu Xen), I notice things start to fall apart. For example, the jobtracker starts dropping requests with the message "Call queue ...
    Michael BieniosekMichael Bieniosek
    Mar 29, 2007 at 8:22 pm
    Mar 29, 2007 at 9:07 pm
  • Hello! I'm having trouble following your tutorial on Getting started with hadoop [GSWH] (from http://wiki.apache.org/lucene-hadoop/GettingStartedWithHadoop). Is it not up to date? I'm using ...
    Pedro GuedesPedro Guedes
    Mar 28, 2007 at 4:04 pm
    Mar 28, 2007 at 7:08 pm
  • Hi *, I was playing around with the latest hadoop (0.12.1) on a virtual "cluster" (4 nodes, one as namenode and jobtracker) using Xen. Each node runs the current Xen kernel (2.6.16.33-xen) with 192 ...
    Maximilian SchöfmannMaximilian Schöfmann
    Mar 19, 2007 at 10:11 am
    Mar 21, 2007 at 4:59 pm
  • Hello! My question is about mapreduce. Is it possible to pass to the map function some global information? For example I have a set of words and a large set of documents. I want the map function to ...
    Ilya VishnevskyIlya Vishnevsky
    Mar 19, 2007 at 3:13 pm
    Mar 19, 2007 at 4:32 pm
  • Hi Hadoops, recently I read an article in a well known German IT magazine about Hadoop and HDFS. Eventually the article says that hadoop is currently not suitable for a production deployment as it is ...
    Simon WillnauerSimon Willnauer
    Mar 13, 2007 at 7:42 pm
    Mar 14, 2007 at 3:58 pm
  • Hi there, Howdy. I just updated hadoop from 0.11.2 to 0.12.0 and getting the following error. java.lang.NullPointerException at org.apache.hadoop.fs.ChecksumFileSystem$FSInputChecker.seek( ...
    Venkatesh SeetharamVenkatesh Seetharam
    Mar 6, 2007 at 5:55 am
    Mar 8, 2007 at 10:24 pm
  • Hello, I'm evaluating Hadoop for a large application. When running the wordcount example, I experience an issue where my master node cannot open a socket to port 50010 of my remote slave node. When I ...
    Jayalakshmi MuniasamyJayalakshmi Muniasamy
    Mar 1, 2007 at 9:32 am
    Mar 2, 2007 at 4:10 am
  • Hello, I am new to Hadoop. After setting my testing environment (which I am not sure if it is correct), I tried to run the Grep sample by Bin/hadoop org.apache.hadoop.samples.Grep myinput myoutput ...
    Richard YangRichard Yang
    Mar 1, 2007 at 6:07 am
    Mar 1, 2007 at 8:10 am
  • Hello, In the file hdfs_design.pdf,it tells us that "A client-request to create a file does not reach the Namenode immediately...",so I just want to ask that what does "client" exactly mean,and how ...
    WayneWayne
    Mar 19, 2007 at 5:11 pm
    Mar 20, 2007 at 3:40 am
  • Hi. I can't seem to find out how to set the compression codec in a SequenceFile if it's created when a program runs with the output format set to SequenceFileOutputFormat. Another question while I'm ...
    Johan OskarssonJohan Oskarsson
    Mar 13, 2007 at 5:50 pm
    Mar 16, 2007 at 4:45 pm
  • Hi, My configuration: hadoop 0.12.0, 19 computers, jdk 6. I ran a m/r task with 133 maps and one reduce. One of the nodes was reported as "Lost task tracker" and the task stall at 99% on map and 32% ...
    Ion BaditaIon Badita
    Mar 15, 2007 at 5:42 am
    Mar 15, 2007 at 8:15 am
  • All, I am having problems with -copyToLocal in Hadoop version 0.12.1. I have injected some data into the Distributed file system of Hadoop 0.12.1 When I try to do -copyToLocal on a file it works fine ...
    Rohan MehtaRohan Mehta
    Mar 13, 2007 at 3:50 pm
    Mar 13, 2007 at 5:37 pm
  • For example my application contains some class SomeClass. And this application uses hadoop mapreduce. What will be if Mapper in it's map function calls a method of SomeClass? If I understand correct ...
    Ilya VishnevskyIlya Vishnevsky
    Mar 23, 2007 at 9:35 am
    Mar 23, 2007 at 3:40 pm
  • Hi, I am new to hadoop, and I am trying to get it running for a single node. I am getting an error with starting secondarynamenode, and with simple testing as "bin/hadoop jar ...
    Lamia M. YouseffLamia M. Youseff
    Mar 20, 2007 at 11:39 pm
    Mar 21, 2007 at 12:50 am
  • Hi, My configuration : hadoop-0.11.3 I ran m/r task. I monitoring http://namenode:50070/dfshealth.jsp page. Then one of datanode dead with followed hs_err log file. What's wrong? ====hs err log file ...
    오석근오석근
    Mar 16, 2007 at 1:30 am
    Mar 16, 2007 at 7:15 am
  • Has anyone tried to use GangliaContext for recording metrics? It looks like I'm supposed to call emitRecord with an OutputRecord object, but I can't seem to find a public constructor or factory for ...
    Michael BieniosekMichael Bieniosek
    Mar 12, 2007 at 7:31 pm
    Mar 12, 2007 at 8:18 pm
  • Hi, I have 17 computers cluster running hadoop 0.12.0 with jdk 6. I runned a job with 14 maps an 3 reducers. On the Job's status map is 100% completed with 0 Failures. When click the 0 link (for the ...
    Ion.baditaIon.badita
    Mar 10, 2007 at 7:13 am
    Mar 10, 2007 at 6:38 pm
  • We finally upgraded our Hadoop install from 9.2 to 12.0. It went pretty smoothly. Kudos to all. However, one change in behavior of the JobClient seems like a problem. In our install we have several ...
    R. James FirbyR. James Firby
    Mar 9, 2007 at 4:16 am
    Mar 9, 2007 at 7:07 am
  • I'm trying to upgrade my code to 0.11.2, and I notice that HADOOP-801 has added an undocumented new method to the RunningJob interface (getTaskCompletionEvents(int)). What should this method return? ...
    Michael BieniosekMichael Bieniosek
    Mar 6, 2007 at 6:05 pm
    Mar 6, 2007 at 8:50 pm
  • Hello, I have been trying to run the sample sort program, but I could not even run the randomwriter to generate random data to be sorted. Here is the beginning of the error message: 07/03/03 06:12:15 ...
    Richard YangRichard Yang
    Mar 6, 2007 at 9:40 am
    Mar 6, 2007 at 3:36 pm
  • Hi there, Howdy. I'm encountring the following error in many of my map operations which prevent my job to complete. java.io.IOException: Resetting to invalid mark at ...
    Venkatesh SeetharamVenkatesh Seetharam
    Mar 31, 2007 at 4:34 am
    Mar 31, 2007 at 4:34 am
  • when I start my program in the interactive shell environment manually,nothing happed and everything goes quit well; but when I put the script in the crontab,I always get this exception below: main ...
    WangxuWangxu
    Mar 25, 2007 at 8:23 am
    Mar 25, 2007 at 8:23 am
  • Hello all, I am new to Hadoop. Have been trying to compile native libraries. The build failed... Can someone shed some lights on this? I was doing the following: [root@bhcls001 hadoop-0.12.2]# ant ...
    Hongbin HuangHongbin Huang
    Mar 25, 2007 at 6:09 am
    Mar 25, 2007 at 6:09 am
  • Seem like IBM has put together a plugin to ease up the mapred development on eclipse. http://www.alphaworks.ibm.com/tech/mapreducetools?open&S_TACT=105AGX59&S_CMP=GR -- Sami Siren
    Sami SirenSami Siren
    Mar 25, 2007 at 5:59 am
    Mar 25, 2007 at 5:59 am
  • Hi: First of all apology to those friends who follow all the list. Often times I work offline and I do not have any commit rights to any of the projects. All the modifications I make for various ...
    RubdabadubRubdabadub
    Mar 22, 2007 at 11:15 am
    Mar 22, 2007 at 11:15 am
  • Hi, I think there is a bug CompressedWritable, more exactly in write() method, which makes subclasses of CompressedWritable not "reusable". More exactly: the data that is written to the DataOutput is ...
    Ion BaditaIon Badita
    Mar 20, 2007 at 2:04 pm
    Mar 20, 2007 at 2:04 pm
  • Hello everyone, I have encountered the following error when I try to use randomwriter (http://wiki.apache.org/lucene-hadoop/RandomWriter) I also changed the configuration to ...
    Richard YangRichard Yang
    Mar 4, 2007 at 5:56 am
    Mar 4, 2007 at 5:56 am
  • Hello everyone, I have encountered the following error when I try to use randomwriter (http://wiki.apache.org/lucene-hadoop/RandomWriter) I also changed the configuration to ...
    Richard YangRichard Yang
    Mar 4, 2007 at 4:04 am
    Mar 4, 2007 at 4:04 am
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43 users for March 2007

Richard Yang: 21 posts Jaylac: 17 posts Gaurav Agarwal: 7 posts Andreas Papadakis: 6 posts Albert Chern: 5 posts Espen Amble Kolstad: 5 posts Michael Bieniosek: 5 posts Owen O'Malley: 5 posts Andrzej Bialecki: 4 posts Dhruba Borthakur: 4 posts Maximilian Schöfmann: 4 posts Tiger Uppercut: 4 posts Venkatesh Seetharam: 4 posts Arun C Murthy: 3 posts Devaraj Das: 3 posts Ilya Vishnevsky: 3 posts Ion Badita: 3 posts 张茂森: 3 posts David Bowen: 2 posts Evan Liu: 2 posts
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