Grokbase Groups HBase user March 2012
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125 discussions - 643 posts

  • Hi, We're running into a brick wall where our throughput numbers will not scale as we increase server counts both using custom inhouse tests and ycsb. We're using hbase 0.92 on hadoop 0.20.2(we also ...
    Juhani ConnollyJuhani Connolly
    Mar 19, 2012 at 10:41 am
    Apr 15, 2012 at 6:29 am
  • Hi All, I am using cdh3u2 and i have 7 worker nodes(VM's spread across two machines) which are running Datanode, Tasktracker, and Region Server(1200 MB heap size). I was loading data into HBase using ...
    Anil guptaAnil gupta
    Mar 30, 2012 at 11:06 pm
    Aug 15, 2012 at 10:14 pm
  • 2012-03-12 22:05:50,736 DEBUG org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation: Cached location for .META.,,1.1028785192 is slave184.uc.uuwatch.com:60020 2012-03-12 ...
    Jiajun ChenJiajun Chen
    Mar 12, 2012 at 2:24 pm
    Mar 26, 2012 at 3:09 pm
  • Hi, I'm running regionservers with 2GB heap and following tuning options: -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:NewRatio=16 -XX:CMSInitiatingOccupancyFraction=70 ...
    Ferdy GalemaFerdy Galema
    Mar 3, 2012 at 1:05 pm
    Mar 21, 2012 at 10:14 am
  • Dear all, I got a weird problem when programming on the pseudo-distributed mode of HBase/Hadoop. The HBase/Hadoop were installed correctly. It also ran well with my Java code. However, if after ...
    Bing LiBing Li
    Mar 27, 2012 at 7:52 pm
    Mar 29, 2012 at 12:15 am
  • Hi, We have region server sporadically stopping under load due supposedly to errors writing to HDFS. Things like: 2012-03-28 00:37:11,210 WARN org.apache.hadoop.hdfs.DFSClient: Error while syncing ...
    Eran KutnerEran Kutner
    Mar 28, 2012 at 11:29 am
    Apr 5, 2012 at 2:36 pm
  • Hello, A couple of days ago, I asked about strange behavior in my "Scan.addFamiliy reduces results" thread. I want to confirm that I did find a bug, and if so, how to submit a bug report. The basic ...
    Peter WolfPeter Wolf
    Mar 17, 2012 at 7:46 pm
    Mar 23, 2012 at 8:32 pm
  • Dear All Friends I'm new at Linux and Hbase. At first time, I install hbase on windows by Cygwin successfully but after install Thrift everything change. so I decided to change my OS and try to ...
    Mahdi NegahiMahdi Negahi
    Mar 5, 2012 at 3:47 pm
    Jul 23, 2012 at 12:51 pm
  • Hi All, I am getting a "Bad line at offset" error in Stderr log of tasks while testing bulk loading a CSV file into HBase. I am using cdh3u2. Import of a TSV works fine. Here is the command i ran: ...
    Anil guptaAnil gupta
    Mar 5, 2012 at 7:49 pm
    May 28, 2012 at 12:36 pm
  • Hello, I used the $ ./bin/hbase org.apache.hadoop.hbase.regionserver.wal.HLog --dump command to check the HLog information. But I can not find any data information. The output of my HLog file is ...
    YonghuYonghu
    Mar 19, 2012 at 2:32 pm
    Sep 24, 2012 at 11:51 am
  • Hi all, I am doing a scan on a table with multiple families. My code looks like this... Scan scan = new Scan(calculateStartRowKey(a), calculateEndRowKey(b)); scan.setCaching(10000); Filter filter = ...
    Peter WolfPeter Wolf
    Mar 15, 2012 at 4:09 pm
    Mar 15, 2012 at 7:41 pm
  • Dear All Friends I install Hbase in standalone mode in my laptop (Ubuntu 11.10) . I want to use Restful API to programming. So I read this link : http://wiki.apache.org/hadoop/Hbase/Stargate so when ...
    Mahdi NegahiMahdi Negahi
    Mar 9, 2012 at 6:28 am
    Mar 15, 2012 at 6:13 pm
  • Hi All, I am using cdh3u2. I ran HBase bulk loading with property "mapred.reduce.tasks.speculative.execution" set to "false" in mapred-site.xml. Still, i can see 6 killed task in Bulk Loading job and ...
    Anil guptaAnil gupta
    Mar 30, 2012 at 9:53 pm
    Apr 2, 2012 at 10:57 pm
  • Hi all, Has someone had problems with HTable.getEndKeys() method? In my application it returns an array of byte[], but the first (and only) byte[] is empty, so essentially it's telling me that the ...
    de Souza Medeiros Andrede Souza Medeiros Andre
    Mar 8, 2012 at 4:25 pm
    Mar 9, 2012 at 10:29 am
  • Hello, I'm wondering whether it worths to store my binary data using HBase? I've read lots of articles and presentation which say that it is highly not recommended but maybe there was some changes in ...
    Konrad TenderaKonrad Tendera
    Mar 4, 2012 at 8:15 am
    Mar 7, 2012 at 7:36 am
  • Hi, I'm learning more about HBase and I'm curious how much of HBase is actually based on Google's original dB. In Google's origins stories, they are well known for using low cost commodity hardware ...
    D SD S
    Mar 5, 2012 at 8:26 am
    Mar 6, 2012 at 2:13 am
  • Dear Friends I try to write a simple application with Java and manipulate my Hbase table. so I read this post and try to follow it. http://hbase.apache.org/docs/current/api/index.html I use eclipse ...
    Mahdi NegahiMahdi Negahi
    Mar 12, 2012 at 8:46 am
    Mar 15, 2012 at 6:26 am
  • Hello, I am importing a 40+ billion row table which I exported several months ago. The data size is close to 18TB on hdfs (3x replication). My problem is when I try to import it with mapreduce it ...
    RitaRita
    Mar 30, 2012 at 2:57 am
    Mar 31, 2012 at 8:27 pm
  • Hi, I have some map reduce jobs that write to Hbase. I am trying to pick a library that could provide transactional support for Hbase. I looked at Omid and hbase-trx . Could you please provide me ...
    Deepika KheraDeepika Khera
    Mar 19, 2012 at 5:49 pm
    Mar 20, 2012 at 6:29 pm
  • Hello, I'm designing some schema for my use case and I'm considering what will be better: rows or columns. Here's what I need - my schema actually looks like this (it will be used for keeping not ...
    Konrad TenderaKonrad Tendera
    Mar 19, 2012 at 8:07 pm
    Mar 20, 2012 at 9:44 am
  • Hi, Can someone please answer this question . I have a column family say A,B,C D can I use just a partial of the column family to retrieve the data.Using the above example can my startrow combine ...
    Newbie24Newbie24
    Mar 9, 2012 at 11:00 pm
    Mar 10, 2012 at 2:12 pm
  • Hi All, I am looking for a way so that I can map my existing CSV file to HBase table, basically for each column family I want only one value (just like RDBMS). Just to illustrate more suppose I ...
    Savant, KeshavSavant, Keshav
    Mar 2, 2012 at 12:56 pm
    Mar 7, 2012 at 7:01 am
  • Hello all, I want to retrieve the most recent N rows from a table, with some column qualifiers. I can't find a Filter, or anything obvious in my books, or via Google. What is the idiom for doing ...
    Peter WolfPeter Wolf
    Mar 2, 2012 at 9:03 pm
    Mar 2, 2012 at 10:01 pm
  • Hello! I am experimenting some problems because I think I don't have distributed computation. I have a map reduce code where I go to a table and I get something of my interest. When I do htop to my 4 ...
    Roberto Alonso CIPFRoberto Alonso CIPF
    Mar 26, 2012 at 3:36 pm
    Mar 28, 2012 at 4:42 pm
  • Hi, I am working with hbase 0.92 co-processor. While aggregate using coprocesor in less amount of data its fine but for bulk data i m getting the following exception. 2012-03-08 11:59:12,479 DEBUG ...
    Raghavendhra rahulRaghavendhra rahul
    Mar 8, 2012 at 6:59 am
    Mar 12, 2012 at 4:45 am
  • Hello list, We are planning to index our data stored in HBase using Solr.As we are totally new to Solr, we would like to have some comments from someone who is already doing it..While looking over ...
    Mohammad TariqMohammad Tariq
    Mar 8, 2012 at 8:19 am
    Mar 11, 2012 at 8:35 pm
  • Hello all, My Region Server just crashed under load. Apparently, it ran out of memory. Disappointing... Does anyone have wisdom on setting Region Server memory? Any reason not to max it out? Thanks ...
    Peter WolfPeter Wolf
    Mar 13, 2012 at 3:35 pm
    Mar 13, 2012 at 7:05 pm
  • Hi, I am a bit confused about using HBase with EMR. In one of the previous thread ( and in EMR Documentation http://aws.amazon.com/elasticmapreduce/), it is said that S3 is the only option available ...
    Mohit GuptaMohit Gupta
    Mar 3, 2012 at 11:46 am
    Mar 6, 2012 at 4:49 pm
  • Hello, I wrote a single program to directly write data content to HFile. Hbase is installed as pseudo-mode. here is my code: public static void putData() throws Exception{ FileSystem fs = new ...
    YonghuYonghu
    Mar 6, 2012 at 12:25 pm
    Mar 6, 2012 at 4:30 pm
  • HI There, Im experimenting with 'hbase' and going through wiki document, part of the document says use the ( create 'test', 'cf' ) command to create a table. but when i try this the command never ...
    Balachandra maddinaBalachandra maddina
    Mar 23, 2012 at 6:32 pm
    Mar 25, 2012 at 11:10 am
  • I have set up HBase and zookeeper for standalone. When I start hbase shell it is starting HMaster gracefully. Even I do jps it shows me HMaster service. But when I check for status on hbase shell ...
    Manish BhogeManish Bhoge
    Mar 21, 2012 at 3:51 pm
    Mar 24, 2012 at 7:30 pm
  • Hi, The coprocessor execution taking more time when i increase the number of regions in the table, why?
    Raghavendhra rahulRaghavendhra rahul
    Mar 20, 2012 at 6:07 am
    Mar 21, 2012 at 3:56 pm
  • Hi, I am trying to migrate data from one hbase table to another using MapReduce.The record count is around 200M. The cluster has 4 regions servers,4 DN and 4 TT. After running for 4-5 hours the ...
    Himanish KusharyHimanish Kushary
    Mar 20, 2012 at 1:33 pm
    Mar 20, 2012 at 6:46 pm
  • Hi, I get the following exception upon Œcreate¹ table command. However most of the times the table does get created. Also, this exception doesn¹t occur upon other commands. Any help is appreciated. ...
    Yermalkar, SanjayYermalkar, Sanjay
    Mar 8, 2012 at 11:32 pm
    Mar 20, 2012 at 1:01 am
  • Hello, Can anyone give me a example to construct the HFileReaderV2 object to read the HFile content. Thanks! Yong
    YonghuYonghu
    Mar 16, 2012 at 4:02 pm
    Mar 16, 2012 at 6:22 pm
  • Hi, We are using HBase version 0.90.3 in a 2 node cluster. Maybe this question has been asked too many times. But I could not find a good answer for this. I created a test table with one column ...
    Hdev mlHdev ml
    Mar 15, 2012 at 10:13 pm
    Mar 16, 2012 at 6:22 pm
  • Dear all, Yesterday I tried to set up the pseudo-distributed mode for HBase on Ubuntu 11 (64-bit). But I failed to do that. What I have done is exactly the same as on Ubuntu 10. On Ubuntu 10, I set ...
    Bing LiBing Li
    Mar 11, 2012 at 3:24 am
    Mar 11, 2012 at 1:52 pm
  • HI all, I was once stung by issue of DNS not working correctly on a Hadoop/Hbase cluster, it wasn't easy to debug. So I wrote a simple utility to verify DNS on a cluster (all machines) ...
    Sujee ManiyamSujee Maniyam
    Mar 8, 2012 at 2:13 am
    Mar 9, 2012 at 10:26 pm
  • *Linux *Debian Squeeze *Hadoop Configuration* Version: hadoop-*0.20.205*.0 IP's:- 192.168.1.*76 *and 192.168.1.*74* /etc/host: master - 192.168.1.*76 *slave - **192.168.1.*74 *Confi*guration files on ...
    GopalGopal
    Mar 8, 2012 at 2:12 am
    Mar 8, 2012 at 4:58 pm
  • http://myexadata.blogspot.com/2012/03/hbase-0905-and-hadoop-020203.html after playing with a while , I concluded that hbase 0.90.5 and hadoop 0.20.203 are incompatible. Please advise if it is ...
    GopalGopal
    Mar 6, 2012 at 4:02 am
    Mar 6, 2012 at 6:01 am
  • I'm trying to setup HBase on top of my HDFS filesystem. I currently have 6 servers but only 3 are configured to run zookeeper and HBase, for testing purposes and the idea of adding the other servers ...
    Stijn DiependaeleStijn Diependaele
    Mar 21, 2012 at 10:19 am
    Apr 3, 2012 at 8:04 am
  • Hello, In a couple of situations we were noticing some odd problems with old data appearing in the application, and I finally found a reproducible scenario. Here's what we're seeing in one basic ...
    Shawn QuinnShawn Quinn
    Mar 27, 2012 at 5:01 pm
    Mar 27, 2012 at 6:19 pm
  • Hi all, We use hbase 0.9.2. We recently started to experience region servers crashed under heavy load (2-3 different servers crashes eah load). Seems like missing block in HDFS causes a full GC and ...
    Lior SchachterLior Schachter
    Mar 25, 2012 at 8:23 am
    Mar 27, 2012 at 9:55 am
  • Hi, I posted this over at the pig forums and Dmitriy suggested I ask on the hbase list as well (original post here ...
    Nick PinckernellNick Pinckernell
    Mar 24, 2012 at 6:20 pm
    Mar 25, 2012 at 3:54 pm
  • Your HBase team are pleased to announce the release of HBase 0.92.1. Download it from your favorite Apache mirror [1]. It should also be available up in maven. HBase 0.92.1 is a bug fix release. For ...
    Michael StackMichael Stack
    Mar 17, 2012 at 11:32 pm
    Mar 20, 2012 at 4:46 pm
  • Hi all, Is there any way for Coprocessors to use external libraries? Hadoop MapReduce can specify them by using -libjars command line arguments or including 'lib' directory in job.jar file. I also ...
    Takuya UESHINTakuya UESHIN
    Mar 17, 2012 at 7:25 am
    Mar 17, 2012 at 7:13 pm
  • Hi All, I am using cdh3u2. I am having problem accessing the table.jsp page from the web interface of HBase cluster. Two days ago i was able to view HBase table information with the help of ...
    Anil guptaAnil gupta
    Mar 14, 2012 at 9:26 pm
    Mar 16, 2012 at 5:08 pm
  • Is scanning supported using partial of the row key? if i have a row key as name + timestamp + id + type can i scan the rows with start key as name + timestamp will it fetch any rows from the base.I'm ...
    Newbie24Newbie24
    Mar 14, 2012 at 6:09 am
    Mar 14, 2012 at 12:14 pm
  • Hello, I am using: hadoop-0.20.2-cdh3u2, hbase-0.90.4-cdh3u3, pig-0.8.1-cdh3u3 I have successfully loaded data into HBase tables (implying my Hadoop & HBase setup is good). I can look at the data ...
    Something SomethingSomething Something
    Mar 8, 2012 at 6:30 am
    Mar 8, 2012 at 9:55 pm
  • Trunk: https://github.com/apache/hbase/blob/trunk/src/main/java/org/apache/hadoop/hbase/mapreduce/LoadIncrementalHFiles.java#L105 This constructor in 0.90 didn't throw an exception, now it throws ...
    David CapwellDavid Capwell
    Mar 15, 2012 at 8:52 pm
    Apr 6, 2012 at 8:35 pm
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146 users for March 2012

Michael Stack: 73 posts Doug Meil: 31 posts Harsh J: 23 posts Jean-Daniel Cryans: 21 posts Peter Wolf: 20 posts Mahdi Negahi: 17 posts Yonghu: 16 posts Lars hofhansl: 15 posts Juhani Connolly: 14 posts Anil gupta: 13 posts Gopal: 13 posts Bing Li: 12 posts Michel Segel: 12 posts Ted Yu: 11 posts Jiajun Chen: 10 posts Konrad Tendera: 9 posts Rita: 9 posts Manish Bhoge: 8 posts N Keywal: 8 posts Raghavendhra rahul: 8 posts
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