Grokbase Groups HBase user April 2012
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109 discussions - 522 posts

  • I want to save a file of size 12MB but an exception occuring like this KeyValue size too large. I have set the value of hbase.client.keyvalue.maxsize in hbase-site.xml and hbase-default.xml to 3GB ...
    VishnupriyaaVishnupriyaa
    Apr 17, 2012 at 1:06 pm
    Apr 20, 2012 at 2:29 pm
  • I have 4 nodes HBase v0.90.4-cdh3u3 cluster deployed on Amazon XLarge instances (16Gb RAM, 4 cores CPU) with 8Gb heap -Xmx allocated for HRegion servers, 2Gb for datanodes. HMaster\ZK\Namenode is on ...
    IjanitranIjanitran
    Apr 6, 2012 at 3:18 pm
    Apr 12, 2012 at 6:22 am
  • To whom it may concern, Ignoring the complexities of gathering the data, assume that I will be tracking millions of unique viewers. Updates from each of our millions of clients are gathered in a ...
    Tom BrownTom Brown
    Apr 9, 2012 at 5:45 pm
    Apr 13, 2012 at 10:33 pm
  • Dear all, Is HBase thread-safety? Do I need to consider the consistency issue when manipulating HBase? Thanks so much! Best regards, Bing
    Bing LiBing Li
    Apr 12, 2012 at 10:10 pm
    Apr 13, 2012 at 12:07 pm
  • Hi HBase community: We have been testing cyclic replication for 1 week. The basic functionality seems to work as described in the document however when we started to increase the write workload, the ...
    Jerry LamJerry Lam
    Apr 20, 2012 at 12:39 pm
    May 2, 2012 at 2:33 am
  • I have an issue with my HBase cluster. We have a 4 node HBase/Hadoop (4*32 GB RAM and 4*6 TB disk space) cluster. We are using Cloudera distribution for maintaining our cluster. I have a single ...
    Narendra yadalaNarendra yadala
    Apr 19, 2012 at 10:43 am
    May 19, 2012 at 3:59 pm
  • Hello, I started working with hadoop / HBase and I have a question about the distribution of map / reduce on a htable through the different nodes of the cluster. If I understand the map is subdivided ...
    SdnetworkSdnetwork
    Apr 4, 2012 at 11:41 am
    Apr 9, 2012 at 10:07 pm
  • Dear all friends does anyone have a sample database of HBase ? I will be glad if someone send for me.
    Mahdi NegahiMahdi Negahi
    Apr 2, 2012 at 3:00 am
    Apr 2, 2012 at 5:11 pm
  • We have an app written in Ruby which uses HBase as the backing store.. It uses Thrift to connect to it.. We were using HBase from Cloudera's CDH3B4 distro until now and it worked fine.. I just ...
    Dhaval ShahDhaval Shah
    Apr 27, 2012 at 4:11 pm
    May 1, 2012 at 5:28 pm
  • Hey all, The default - HBaseStorage() takes hell lot of time for puts. In a cluster of 5 machines, insertion of 175 Million records took 4Hours 45 minutes Question - Is this good enough ? each ...
    Rajgopal VaithiyanathanRajgopal Vaithiyanathan
    Apr 26, 2012 at 11:39 am
    May 12, 2012 at 8:57 am
  • Hello, During recent weeks I constantly see some RSs *silently* dying on our HBase cluster. By "silently" I mean that process stops, but no errors in logs [1]. The only thing I can relate to it is ...
    Alex BaranauAlex Baranau
    Apr 30, 2012 at 7:48 pm
    May 3, 2012 at 10:19 am
  • Hi All, Can anyone help me with this exception? I have been trying to import data from csv files into HBase. As per my understanding the process is 1. Import as HFile using *importtsv *tool provided ...
    Sambit TripathySambit Tripathy
    Apr 26, 2012 at 8:50 am
    May 2, 2012 at 6:43 am
  • Hi I'm trying to write a unit test for HBase coprocessor. However it seems I'm doing something horribly wrong. The code I'm using to test my coprocessor class is in the attachment. As you can see, ...
    Marcin CylkeMarcin Cylke
    Apr 16, 2012 at 1:11 pm
    Apr 19, 2012 at 3:09 pm
  • We have been running M-R jobs successfully on Hadoop v1 and HBase 0.93 SNAPSHOT (built from trunk) using the HBase Java API. We recently updated our Hadoop and HBase installations to the latest ...
    Royston SellmanRoyston Sellman
    Apr 10, 2012 at 10:05 am
    Apr 12, 2012 at 6:00 pm
  • Hi What can make a region server unbalanced when it comes to space ? (and possibly requests too). For example; I have 5 node cluster (replication factor of 3); and in which all 4 has same size; where ...
    David CharleDavid Charle
    Apr 24, 2012 at 1:42 am
    Apr 24, 2012 at 4:15 am
  • Resently, my app meets a problem list as follows Can't construct instance of class org/apache/hadoop/hbase/client/HBaseAdmin Exception in thread "Thread-2" java.lang.OutOfMemoryError: unable to ...
    Eason LeeEason Lee
    Apr 19, 2012 at 4:07 am
    Apr 19, 2012 at 8:02 am
  • Hi all: Just had a desperate night....We had a small production hbase cluster( 8 nodes), and due to the accident crash of a few nodes, ROOT and META are corrupted, while the rest of tables are mostly ...
    Yabo XuYabo Xu
    Apr 14, 2012 at 8:36 pm
    Apr 16, 2012 at 4:11 pm
  • Dear all, I got an exception as follows when running HBase. My Hadoop is set up in the pseudo-distributed mode. The exception happens after the system runs for about one hour. The specification of ...
    Bing LiBing Li
    Apr 11, 2012 at 4:28 pm
    Apr 11, 2012 at 7:40 pm
  • Dear all, I found some methods existed in HTable were not in HTableInterface. setAutoFlush setWriteBufferSize ... In most cases, I manipulate HBase through HTableInterface from HTablePool. If I need ...
    Bing LiBing Li
    Apr 5, 2012 at 11:21 am
    Apr 5, 2012 at 4:07 pm
  • I am working on a project that uses HBase and want to develop my unit tests to use the HBaseTestingUtility to test without a separate cluster, but I am running into a lot problems using it ...
    Noah WatkinsNoah Watkins
    Apr 4, 2012 at 7:40 pm
    Apr 4, 2012 at 10:18 pm
  • I delete a row and I want to add the same row ( with same Timestamp ) to HBase but it is not added to the table. I know if I changed the timestamp it will added but it is necessary to add it with the ...
    Mahdi NegahiMahdi Negahi
    Apr 25, 2012 at 4:05 am
    Apr 25, 2012 at 3:46 pm
  • Hello, My HBase version is 0.92.0. And I find that when I use minor compaction and major compaction to compact a table, there are no differences. In the minor compaction, it will remove the deleted ...
    YonghuYonghu
    Apr 26, 2012 at 6:48 am
    Apr 27, 2012 at 8:28 am
  • Hello, We have a Hadoop cluster running on EC2 with Cloudera's hadoop-0.20.2-cdh3u2 distribution. We are now ready to install HBase on it. Trying to figure out what's the best way to accomplish ...
    Something SomethingSomething Something
    Apr 26, 2012 at 5:13 am
    Apr 26, 2012 at 2:06 pm
  • I'm trying to find a definitive answer to the question if scans on timerange alone will scale when you use uniformly distributed keys like UUIDs. Since the keys are randomly generated that would mean ...
    Rob VerkuylenRob Verkuylen
    Apr 14, 2012 at 2:39 pm
    Apr 25, 2012 at 8:49 pm
  • Hello, I am running HBase 0.92.0, and I am wondering if there is a way to scan a table, cache the ResultScanner, and then continuously filter the ResultScanner. The use case is to represent the ...
    Kevin MKevin M
    Apr 18, 2012 at 3:14 pm
    Apr 20, 2012 at 4:37 am
  • Hello, My hbase version is 0.92.0 and is installed in pseudo-mode. I found a strange situation of HLog. After I inserted new data value into table, the volume of HLog is 0. I checked in HDFS ...
    YonghuYonghu
    Apr 15, 2012 at 3:59 pm
    Apr 15, 2012 at 6:48 pm
  • Hello, Is there any maintenance going on with hbase.apache.org? All the links (ex: http://hbase.apache.org/book/architecture.html#arch.overview) are return 404 NOT FOUND Thanks, Nitin Pawar
    Nitin PawarNitin Pawar
    Apr 13, 2012 at 7:59 am
    Apr 13, 2012 at 8:30 pm
  • All: I'm doing a little research into various ways to apply schema modifications to an HBase cluster. Anybody care to share with the list what you currently do? E.g. - Connect via the HBase shell and ...
    Ian VarleyIan Varley
    Apr 9, 2012 at 4:09 pm
    Apr 12, 2012 at 5:00 pm
  • when i try to start hadoop then its all services like TaskTracker, JobTracker, DataNode ,SecondaryNameNode are running except NameNode.So, HBase is unable to find hadoop as namenode is not up.So ...
    Shaharyar khanShaharyar khan
    Apr 10, 2012 at 1:01 pm
    Apr 10, 2012 at 6:53 pm
  • We're looking at how to store a large amount of (per-user) list data in hbase, and we were trying to figure out what kind of access pattern made the most sense. One option is store the majority of ...
    Derek WollensteinDerek Wollenstein
    Apr 2, 2012 at 8:11 pm
    Apr 4, 2012 at 6:21 pm
  • All when I try and run in distributed mode with two servers I get this error when starting the slave node two nodes node1 = master node2 = slave <property <name hbase.zookeeper.quorum</name <value ...
    Ben CuthbertBen Cuthbert
    Apr 2, 2012 at 5:32 am
    Apr 2, 2012 at 5:37 pm
  • hi : recently, i use OffMetaRepair to rebulid meta table, but some region Could not seek StoreFileScanner[HFileScanner for reader. Then i prefix scan rows of the table, it will wait with some row ...
    永江梁永江梁
    Apr 19, 2012 at 5:56 am
    May 1, 2012 at 12:06 am
  • We are transitioning from a BerkeleyDB+MySQL backend to testing Hbase. One of the toughest challenges we are facing is porting the interface over. All our clients were using C/C++ APIs of Berkeley ...
    Srinivas KrishnanSrinivas Krishnan
    Apr 27, 2012 at 2:48 am
    Apr 27, 2012 at 5:58 pm
  • Hi am new to hbase and hadoop. I want to install hbase and to work with hbase writing mapreduce jobs for data in hbase. I installed hbase. It works well in standalone mode but dont start master and ...
    ShehreenShehreen
    Apr 25, 2012 at 1:32 pm
    Apr 25, 2012 at 7:41 pm
  • I have a cluster Hbase set-up. In that I have 3 Region Servers. There is a table which has 27 Regions equally distributed among 3 Region servers--9 regions per region server. Region server 1 has ...
    SkchaudharySkchaudhary
    Apr 24, 2012 at 7:41 pm
    Apr 25, 2012 at 3:02 pm
  • I run this command: mvn clean -DskipTests install assembly:single -Dsnappy it shows: Downloading ...
    ShixingShixing
    Apr 23, 2012 at 10:33 am
    Apr 25, 2012 at 12:59 am
  • Greetings, we have a 4 nodes cluster running HBase-0.90.3 over Hadoop-0.20-append. We'd like to create another HBase cluster from this one with minimal HBase downtime. We have plenty of disk space on ...
    Manuel de FerranManuel de Ferran
    Apr 17, 2012 at 8:53 am
    Apr 19, 2012 at 9:03 pm
  • Hello, We've recently had a problem where regions will get stuck in transition for a long period of time. In fact, they don't ever appear to get out-of-transition unless we take manual action. Last ...
    Bryan BeaudreaultBryan Beaudreault
    Apr 16, 2012 at 3:21 pm
    Apr 18, 2012 at 6:17 pm
  • "client.HConnectionManager$HConnectionImplementation: ZooKeeper available but no active master location found" Having a problem with master startup that I have not seen before. running the following ...
    Henri PipeHenri Pipe
    Apr 12, 2012 at 11:24 pm
    Apr 16, 2012 at 7:29 pm
  • Hello, I wonder if it's possible to install two different Hbase versions in the same cluster? Thanks Yong
    YonghuYonghu
    Apr 16, 2012 at 11:31 am
    Apr 16, 2012 at 12:48 pm
  • Hi, I'm having a problem with sync latency on our HBase cluster. Our cluster is composed of 2 NN (and HBase master) machines and 12 DN (and HBase regionservers and thrift servers). We are having ...
    Placido RevillaPlacido Revilla
    Apr 4, 2012 at 3:13 pm
    Apr 10, 2012 at 3:12 pm
  • Hello, I have a table whose key is structured as "eventType + time", and I need to periodically run a map reduce job on the table which will process each event type within a specific time range. So, ...
    Shawn QuinnShawn Quinn
    Apr 3, 2012 at 12:53 pm
    Apr 3, 2012 at 2:49 pm
  • Helllooo, I am using hbase thrift for my app. I have made a table for patient which has first a column family called info which contains his/her general info. I want to make a method to search for a ...
    Dalia SobhyDalia Sobhy
    Apr 2, 2012 at 8:27 pm
    Apr 2, 2012 at 9:05 pm
  • Hi, I have a problem while building a hbase setup for two computers. I have two computers which are: ----------------------------------- hostname: master ip: 10.10.10.1 domainName: master.bigdata.com ...
    Yavuz gokirmakYavuz gokirmak
    Apr 29, 2012 at 2:36 pm
    Apr 30, 2012 at 6:08 am
  • Hi, Im trying to filter a Hbase table where column names are like foo_1 foo_2 foo_3.. A sql equalent query will be like "Select * from tablename where colunm name like 'foo_%' and value ='value'" The ...
    DavisDavis
    Apr 26, 2012 at 1:45 pm
    Apr 26, 2012 at 8:42 pm
  • Hello folks, i am trying to import a CSV file that is around 10 gb into HBASE. After the import, i check the size of the folder with the hadoop fs -du command, and it is a little above 100 gigabytes ...
    MeteMete
    Apr 7, 2012 at 8:21 pm
    Apr 23, 2012 at 7:45 am
  • Hello all, We had a node die on us, and the master could not recover the HLogs due to timeout issues, but HBase stayed up and all of the regions were re-assigned. The node crashed hard (IT is ...
    Chris TarnasChris Tarnas
    Apr 14, 2012 at 4:50 pm
    Apr 17, 2012 at 6:29 pm
  • Very simple question as the subject shows: Is htable.delete(List<Delete ) transactional? Say if I am to delete 1000 rows and in the middle of deletion some error occurs, then will the whole deletion ...
    Haijia ZhouHaijia Zhou
    Apr 16, 2012 at 11:28 pm
    Apr 16, 2012 at 11:48 pm
  • We have 16 m1.xlarge ec2 machines as region servers, running cdh3u2, hosting about 17k regions. Each region server has 10GB of heap, and in normal operating levels I have never seen our used heap go ...
    Bryan BeaudreaultBryan Beaudreault
    Apr 11, 2012 at 5:25 pm
    Apr 12, 2012 at 5:59 am
  • Hi I installed maven (maven2.2), downloaded the /home/ajc/Downloads/hbase-0.90.5.tar.gz, decompressed and within the root dir ran: mvn -DskipTests package ... and got: [INFO] Scanning for ...
    Alan ChaneyAlan Chaney
    Apr 10, 2012 at 11:35 pm
    Apr 11, 2012 at 3:34 pm
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154 users for April 2012

Michael Stack: 31 posts Doug Meil: 22 posts Michel Segel: 17 posts Bing Li: 16 posts Bryan Beaudreault: 14 posts Alex Baranau: 13 posts Jean-Daniel Cryans: 13 posts Harsh J: 12 posts Lars hofhansl: 12 posts Yonghu: 12 posts Shashwat shriparv: 11 posts Andrew Purtell: 9 posts Mahdi Negahi: 9 posts Ted Yu: 9 posts Ian Varley: 8 posts Sdnetwork: 8 posts Jonathan Hsieh: 7 posts Marcos Ortiz: 7 posts Tom Brown: 7 posts Eason Lee: 6 posts
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