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38 discussions - 118 posts

  • Hi folks, I would like to open a discussion on how we can make HBase work well with a supported/released version of Hadoop. HBase currently ships with a hadoop jar and that hadoop jar is from hadoop ...
    Dhruba BorthakurDhruba Borthakur
    May 7, 2010 at 5:35 pm
    Jun 2, 2010 at 5:00 pm
  • As HDFS and MapReduce have matured the cost and complexity of introducing features has grown. Each new feature has to consider interactions with a growing set of existing features, a growing user ...
    Eli CollinsEli Collins
    May 21, 2010 at 8:42 pm
    Jun 29, 2010 at 6:11 pm
  • Hi everyone, I have recently started to play around with hadoop, but I am getting some into some "design" problems. I need to make a loop to execute the same job several times, and in each iteration ...
    Renato Marroquín MogrovejoRenato Marroquín Mogrovejo
    May 5, 2010 at 3:30 pm
    May 16, 2010 at 2:05 am
  • Hi, I am using a HashPartitioner on my key for a map reducer job. I am wondering how sometimes 2 reducers end up getting the same key ? I have the hashCode method defined for my key. Also, I have ...
    Deepika KheraDeepika Khera
    May 24, 2010 at 9:39 pm
    May 28, 2010 at 12:59 am
  • I'm new to Hadoop and I've been given the task to see how we might utilise Hadoop and HBase to implement an Active-Active site layer for sharing information across a distributed application. I've ...
    Anthony IkedaAnthony Ikeda
    May 24, 2010 at 11:46 pm
    May 25, 2010 at 10:04 am
  • This month, the MapReduce + HDFS contributor meeting was held at Cloudera Headquarters. Announcements for contributor meetings are here: http://www.meetup.com/Hadoop-Contributors/ Minutes follow. No ...
    Chris DouglasChris Douglas
    May 29, 2010 at 12:37 am
    Jun 1, 2010 at 7:25 pm
  • Hello to all, first of all many thanks for this great piece of software you are all contributing to :) I am actually creating a program in Hadoop MapReduce, but I intend to massively use JUnit Tests ...
    Varene OlivierVarene Olivier
    May 27, 2010 at 8:34 am
    May 28, 2010 at 12:48 pm
  • Hi, We use CDH2 hadoop-0.20.2+228 which crashed on datanode smsrv10.ciq.com I found this in datanode log: 2010-05-15 07:37:35,955 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block ...
    Ted YuTed Yu
    May 17, 2010 at 4:58 pm
    May 18, 2010 at 1:20 am
  • Hello, we're having some issues with this... Any idea please? 2010-05-07 05:59:46,998 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: Cannot initialize JVM Metrics with processName=MAP, sessionId= - ...
    Pierre ANCELOTPierre ANCELOT
    May 7, 2010 at 9:53 am
    May 7, 2010 at 3:15 pm
  • Hi, I am a new user for HDFS. I tried to understand the documentation given on the website but I am not able to get most of the things. Is there any complete or more elaborated documentation for HDFS ...
    Abhishek GuptaAbhishek Gupta
    May 25, 2010 at 8:08 pm
    May 25, 2010 at 8:33 pm
  • Since there are few sources on how to write a good Writable, I want to share some tips I've learned over the last few days, while writing a job that demanded some complex Writable object. I will be ...
    Oded RosenOded Rosen
    May 22, 2010 at 9:10 pm
    May 22, 2010 at 10:13 pm
  • All, As a reminder the CFP for proposals closes today. The CFP is at http://blogs.apache.org/conferences/date/20100428 -- Owen ApacheCon North America 2010 1-5 November 2010 -- Westin Peachtree in ...
    Owen O'MalleyOwen O'Malley
    May 28, 2010 at 9:41 pm
    Jun 3, 2010 at 11:04 pm
  • I've created a client to connect to the Stargate REST interface which appears to be working. However, when I tried to create my initial table it appears that there is no data in the response. Is this ...
    Anthony IkedaAnthony Ikeda
    May 26, 2010 at 4:49 am
    May 26, 2010 at 6:42 am
  • The first meeting of the Chicago area Hadoop User Group will be help on Wednesday, May 19th from 6:00-8:00PM. The meeting will be held at Orbitz Worldwide headquarters located in the Citigroup ...
    Jonathan SeidmanJonathan Seidman
    May 12, 2010 at 2:52 pm
    May 12, 2010 at 6:38 pm
  • Hello I am a new user of Hadoop and I have some trouble using Hadoop Streaming and the "-D mapred.tasktracker.map.tasks.maximum" option. I'm experimenting with an unmanaged application (C++) which I ...
    Corneliu-Tudor VladCorneliu-Tudor Vlad
    May 10, 2010 at 2:07 pm
    May 11, 2010 at 8:27 pm
  • Hi Is there a way of executing multiple tasks in parallel in a single JVM. For a particular job we see a child process being spawned for each task, despite mapred.job.reuse.jvm.num.tasks being set to ...
    Rohan RaiRohan Rai
    May 11, 2010 at 1:59 pm
    May 11, 2010 at 2:23 pm
  • By what I've learned from different sites around the web (hadoop wiki, cloudera<http://www.cloudera.com/blog/2009/05/what%E2%80%99s-new-in-hadoop-core-020/ , mail archive, etc), the MultipleInputs ...
    Oded RosenOded Rosen
    May 9, 2010 at 9:09 pm
    May 10, 2010 at 4:39 am
  • After 0.20 was branched in 2008, there have been no releases of Hadoop from trunk despite active development of the mainline. Tom White is working to cut a new release, but given its record in the ...
    Chris DouglasChris Douglas
    May 4, 2010 at 8:31 pm
    May 5, 2010 at 7:01 pm
  • Hello, I am just reading and understanding Hadoop and all the other components. However I have a fundamental question for which I am not getting answers in any of the online material that is out ...
    Vijay RaoVijay Rao
    May 9, 2010 at 5:42 am
    May 9, 2010 at 6:45 am
  • Hi All, I am trying to configure fair scheduler in hadoop. I have followed all the instructions given in hadoop common docs ( ...
    Vandana AyyalasomayajulaVandana Ayyalasomayajula
    May 3, 2010 at 4:57 am
    May 3, 2010 at 5:56 am
  • OpenSQL Camp is a free conference of, by, and for the open-source database community of users and developers. The OpenSQLCamp 2010, European Edition (http://opensqlcamp.org/) will take part in ...
    Giuseppe MaxiaGiuseppe Maxia
    May 31, 2010 at 2:40 pm
    May 31, 2010 at 2:40 pm
  • Hello, Greetings from IIIT, Hyderabad, We are delighted to inform you that IIIT-H is proudly conducting the first ever nationwide Workshop on Embedded Systems and its application in Robotics and ...
    IIIT-H RoboticsIIIT-H Robotics
    May 28, 2010 at 9:29 pm
    May 28, 2010 at 9:29 pm
  • I was trying to run hdfs_test.c present in $HADOOP_HOME/src/c++/libhdfs directory of hadoop. I am facing problems running it properly. Can somebody guide me how to run it. vidur
    Vidur GoyalVidur Goyal
    May 27, 2010 at 5:46 am
    May 27, 2010 at 5:46 am
  • Hi all, According to the map task scheduling rules, it prefers a task with data local. And seeing the Data-local map counter(in the job report), it does have a very high locality for all the map ...
    May 26, 2010 at 3:08 am
    May 26, 2010 at 3:08 am
  • Hi, We currently use hadoop 0.20.1 I found the following trace in our log: 2010-05-17 16:19:55,389 INFO [FSInputChecker] Found checksum error: b[0, ...
    Ted YuTed Yu
    May 24, 2010 at 4:16 pm
    May 24, 2010 at 4:16 pm
  • Hi, We monitor number of open connections to task tracker: public static IMonitorQuery RPC_NUM_OPEN_CONNECTIONS = new JmxQuery("", HADOOP_TASKTRACKER_WILDCARD(), "NumOpenConnections", ...
    Ted YuTed Yu
    May 22, 2010 at 2:38 am
    May 22, 2010 at 2:38 am
  • Hi, Do we have a patch to support splitting with the bzip2 format for the current stable version 0.20.2 ? Please refer to JIRA below : https://issues.apache.org/jira/browse/HADOOP-4012 Thanks, Deepika
    Deepika KheraDeepika Khera
    May 20, 2010 at 8:56 pm
    May 20, 2010 at 8:56 pm
  • I'd like folks to know that I am misquoted in this article: http://www.theregister.co.uk/2010/05/17/doug_cutting_hadoop/ First, I don't know what interview with me they're referring to. I've done no ...
    Doug CuttingDoug Cutting
    May 20, 2010 at 5:35 pm
    May 20, 2010 at 5:35 pm
  • Hi, Do we have a patch to support splitting with the bzip2 format for the current stable version 0.20.2 ? Refer to JIRA below : https://issues.apache.org/jira/browse/HADOOP-4012 Thanks, Deepika
    Deepika KheraDeepika Khera
    May 18, 2010 at 11:17 pm
    May 18, 2010 at 11:17 pm
  • The Apache ZooKeeper team is proud to announce Apache ZooKeeper version 3.3.1 ZooKeeper is a high-performance coordination service for distributed applications. It exposes common services - such as ...
    Patrick HuntPatrick Hunt
    May 17, 2010 at 4:21 pm
    May 17, 2010 at 4:21 pm
  • Hadoop Fans, just a quick note about training options at the Hadoop Summit. There are discounts expiring soon, so if you planned to attend, or didn't know, we want to make sure you stay in the loop. ...
    Christophe BiscigliaChristophe Bisciglia
    May 11, 2010 at 11:13 pm
    May 11, 2010 at 11:13 pm
  • Hello! We have an immediate need here at Meebo and I'm positive someone from the community would be interested. This is a permanent opportunity located in Mountain View, CA. We are looking for a Data ...
    Kiko GriffinKiko Griffin
    May 11, 2010 at 8:09 pm
    May 11, 2010 at 8:09 pm
  • Sorry for bothering you. This is an advertisement, about one job opportunity in Shanghai, China. If you don't like it, please ignore it. Baixing.com is one start-up company invested by eBay, and it's ...
    May 8, 2010 at 8:58 am
    May 8, 2010 at 8:58 am
  • HBase 0.20.0 is available for download: http://hadoop.apache.org/hbase/releases.html The Release Notes are available here [1]. This relesae includes critical fixes, some improvements and performance ...
    May 5, 2010 at 9:26 pm
    May 5, 2010 at 9:26 pm
  • Hi All, I am writing to you for Packt Publishing, the publishers of computer related books. We are planning to expand the catalogue of our books on databases and are looking forward to publish some ...
    Kshipra SinghKshipra Singh
    May 5, 2010 at 8:11 am
    May 5, 2010 at 8:11 am
  • I am happy to announce we have started a Hadoop users group in Boulder and Denver Colorado area. We'll be having our next meeting on May 12th at 7pm. I would like to invite anyone in the area to ...
    Jacob R RideoutJacob R Rideout
    May 4, 2010 at 9:35 pm
    May 4, 2010 at 9:35 pm
  • Hi Agenda is available for the upcoming HUG. Hope to see you all there. http://www.meetup.com/hadoop/calendar/13048582/ thanks Dekel Register today for Hadoop Summit 2010 June 29th, Hyatt, Santa ...
    Dekel TankelDekel Tankel
    May 4, 2010 at 6:32 pm
    May 4, 2010 at 6:32 pm
  • 3rd Munich OpenHUG Meeting I am pleased to invite you to our third Munich Open Hadoop User Group Meeting! Like always we are looking forward to see everyone again and are welcoming new attendees to ...
    Lars GeorgeLars George
    May 1, 2010 at 4:42 pm
    May 1, 2010 at 4:42 pm
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52 users for May 2010

Ted Yu: 8 posts Eli Collins: 7 posts Deepika Khera: 6 posts Stack: 6 posts Anthony Ikeda: 5 posts Steve Loughran: 5 posts Todd Lipcon: 5 posts Aaron Kimball: 4 posts Allen Wittenauer: 4 posts Renato Marroquín Mogrovejo: 4 posts Varene Olivier: 4 posts Chris Douglas: 3 posts Dhruba Borthakur: 3 posts Eric Sammer: 3 posts Oded Rosen: 3 posts Abhishek Gupta: 2 posts Corneliu-Tudor Vlad: 2 posts Doug Cutting: 2 posts Hemanth Yamijala: 2 posts Jay Booth: 2 posts
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