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89 discussions - 483 posts

  • Lately we have added a secondary index feature to a persistence tier over HBASE. Essentially we implemented what is described as "Dual-Write Secondary Index" in ...
    Henning BlohmHenning Blohm
    Dec 22, 2013 at 10:12 am
    Jan 4, 2014 at 6:32 pm
  • Hi, I have 2 clusters, Master (a) - Slave (b) replication. B doesn't have client write or reads, all handlers (100) are waiting but rpc.metrics.RpcQueueTime_num_ops and ...
    Federico GauleFederico Gaule
    Dec 5, 2013 at 12:50 pm
    Dec 10, 2013 at 7:01 pm
  • hi I have been attempting to learn hbase and have been unable to get a local copy running, it comes back with"could not find or load main class org.apache.hadoop.hbase.util.HBaseConfTool" and "could ...
    Gerald KleinGerald Klein
    Dec 27, 2013 at 2:22 pm
    Dec 27, 2013 at 7:55 pm
  • Hello All, I am newbie in hbase and wanted to see if there are any good hbase client that i can use to query underlying hbase datastore or what is the best tool to use? I am using command line but ...
    Dec 13, 2013 at 10:07 pm
    Dec 13, 2013 at 10:52 pm
  • Hello HBase users, I just ran a very simple performance test and would like to see if what I experienced make sense. The experiment is as follows: - I filled a hbase region with 700MB data (each row ...
    Jerry LamJerry Lam
    Dec 23, 2013 at 8:19 pm
    Jan 2, 2014 at 11:53 pm
  • Hi I have been performance tuning HBase 0.94.6 running Phoenix 2.2.0 the last couple of days and need some help. Background. - 23 machine cluster, 32 cores, 4GB heap per RS. - Table t_24 have 24 ...
    Kristoffer SjögrenKristoffer Sjögren
    Dec 21, 2013 at 7:17 pm
    Dec 29, 2013 at 6:43 am
  • Hello, during the loading of data in our cluster I noticed some strange behavior of some regions, that I don't understand. Scenario: We convert data from a mysql database to HBase. The data is ...
    Timo SchaepeTimo Schaepe
    Dec 13, 2013 at 4:14 pm
    Dec 20, 2013 at 2:48 am
  • I imported data into HBase in the fashion of bulk load, but after that I found many unexpected file were created in the HDFS directory of /user/root/, and they like these ...
    Tao XiaoTao Xiao
    Dec 16, 2013 at 10:48 am
    Jan 18, 2014 at 8:13 am
  • Hi all, I'm using Hadoop 1.0.4 and HBase 0.94.12. When trying to bulk load using the Java API I sometimes get the HFiles moved to the wrong directory. I'm pre-splitting regions and the new regions ...
    Amit SelaAmit Sela
    Dec 15, 2013 at 11:09 pm
    Dec 17, 2013 at 12:12 pm
  • All, I am working on an HBase application where we store user events in an HBase table. The row key is the a user identifier and each column is an event identifier. Most users only have a handful of ...
    Shawn HermansShawn Hermans
    Dec 5, 2013 at 10:47 pm
    Dec 7, 2013 at 1:00 am
  • Hey there First, my Environment: Hortonworks HDP2(HBase, Pig 0.11.1). I use pig to load data from hbase, then got Exception Message of java.lang.ClassNotFoundException ...
    Kyle LinKyle Lin
    Dec 6, 2013 at 9:58 am
    Dec 10, 2013 at 2:06 am
  • In order to turn off major compaction, I set MAJOR_COMPACTION_PERIOD to 0. However, I checked region server log, saw major compaction “happened" quite often: 2013-12-17 01:44:45,085 INFO ...
    Dec 20, 2013 at 5:00 am
    Dec 20, 2013 at 6:54 am
  • Hi there, I'm wondering if the Periodic Flusher should be disabled by default? During a recent upgrade, I've noticed a strange behavior modification on my servers, and it was due to this new feature, ...
    Adrien MogenetAdrien Mogenet
    Dec 8, 2013 at 12:01 pm
    Dec 14, 2013 at 5:27 pm
  • Hi At the moment HFileWriterV2.close breaks at startup when using Guava 15. This is not a client problem - it happens because we start a master node to do integration tests. A bit precarious and ...
    Kristoffer SjögrenKristoffer Sjögren
    Dec 16, 2013 at 10:02 am
    Dec 16, 2013 at 8:36 pm
  • CDH4.1.2 HBase 0.92.1 HDFS 2.0.0 Every 3 hours, our production HBase cluster does something that causes all the data nodes to have a sustained spike in CPU/network/disk. The spike lasts about 30 ...
    Patrick SchlessPatrick Schless
    Dec 13, 2013 at 8:08 pm
    Dec 16, 2013 at 5:12 pm
  • The Phoenix team is pleased to announce that Phoenix[1] has been accepted as an Apache incubator project[2]. Over the next several weeks, we'll move everything over to Apache and work toward our ...
    James TaylorJames Taylor
    Dec 13, 2013 at 11:50 pm
    Dec 16, 2013 at 4:56 am
  • Hi Can Anyone tell me the Java API for getting the Region Size of a table! Thanks!
    Vineet MishraVineet Mishra
    Dec 2, 2013 at 1:49 pm
    Dec 3, 2013 at 5:56 am
  • Hi folks, we're currently running CDH4.1.2 (HBase 0.92 + patches). Looking through the logs, I'm seeing that some tables are flushing at much lower size than others (a few dozen KB as opposed to the ...
    Norbert BurgerNorbert Burger
    Dec 26, 2013 at 9:53 pm
    Dec 27, 2013 at 9:09 pm
  • Any idea why I'm getting this? Error: java.lang.ClassNotFoundException: com.google.common.base.Preconditions at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Dec 23, 2013 at 4:12 pm
    Dec 25, 2013 at 5:11 pm
  • Hey guys, we are searching for a consistent backup strategy with the export tool. Is this article still up-to-date and I can use it? ...
    Timo SchaepeTimo Schaepe
    Dec 23, 2013 at 6:55 pm
    Dec 23, 2013 at 9:51 pm
  • Hi, To spread I/O on multiple disks of the HBase cluster, I set the property "hbase.local.dir" in hbase-site.xml to a comma-separated list of directories on different disks as follows: <property ...
    Tao XiaoTao Xiao
    Dec 20, 2013 at 7:12 am
    Dec 21, 2013 at 2:32 am
  • Sorry if it may sounds like an open-end question, but I am wondering why this scenario happened after many region-splits, https://github.com/sentric/hannibal/wiki/Usage#wiki-region_splits It seems to ...
    Kim ChewKim Chew
    Dec 19, 2013 at 2:12 am
    Dec 19, 2013 at 7:05 pm
  • hello all, i was just taking a look at HTable source code to get a bit more understanding about hbase from a client perspective. i noticed that puts are put into a bugger (writeAsyncBuffer) that gets ...
    Koert KuipersKoert Kuipers
    Dec 6, 2013 at 11:06 pm
    Dec 10, 2013 at 1:18 pm
  • Hi, When I first started learning about HBase I compared the logic of setting new values to something that is similar to the way a tool like Subversion works: When you set a new value you don't ...
    Niels BasjesNiels Basjes
    Dec 9, 2013 at 5:39 pm
    Dec 10, 2013 at 4:51 am
  • Hi, I set up a hbase cluster(hbase-0.96.0-hadoop2 + hadoop-2.2.0) with 1 master and 3 slaves. Everything seems fine when I use hbase shell on the master. I could create/scan tables. But when I tried ...
    Rural HunterRural Hunter
    Dec 6, 2013 at 4:28 pm
    Dec 10, 2013 at 1:33 am
  • Hi all, I got a trouble in using HRegion's RegionScanner in RegionServer. In my project, a custom RPC server was started in RegionServer using coprocessor mechanism, and it work well. In this RPC ...
    Wukang LinWukang Lin
    Dec 3, 2013 at 4:22 pm
    Dec 9, 2013 at 2:59 pm
  • Hi, We have cluster with 4 data nodes and HBase version is 0.94.10. We have created snapshot for all hbase tables and trying to export snapshot in two ways. option 1.Export snapshot into same cluster ...
    Oc tsdbOc tsdb
    Dec 2, 2013 at 5:20 pm
    Dec 3, 2013 at 3:27 pm
  • I think I stopped my master while it was doing a big balancing. At restart, I'm getting the exception below and master exit. All RS are able to start correctly, but not the master. Since master is ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Dec 26, 2013 at 2:01 pm
    Dec 27, 2013 at 1:53 pm
  • I have SequenceFiles I'd like to convert to HFile. How do I that?
    Igor GatisIgor Gatis
    Dec 6, 2013 at 4:36 am
    Dec 7, 2013 at 2:39 pm
  • Hello, I am just starting to use HBase and I am coming from Cassandra world.Here is a quick background regarding my data: My system will be storing data that belongs to a certain category. Currently ...
    Kamal BahadurKamal Bahadur
    Dec 23, 2013 at 11:02 pm
    Dec 24, 2013 at 1:39 am
  • Hi , Is there a way where i can read record in region directly? Example : If my table is splited into 8 region and i have 4 RS(Each has 2 region) . I have control on my Rowkey split. Now i need to ...
    Syed Abdul KatherSyed Abdul Kather
    Dec 13, 2013 at 1:39 pm
    Dec 14, 2013 at 6:49 pm
  • Hi, Our production cluster is in distributed mode with 5 servers as zookeeper quorum. While accessing production HBase server from our application we are getting zookeeper.znode.parent mismatch ...
    Sandeep LSandeep L
    Dec 13, 2013 at 6:48 am
    Dec 13, 2013 at 8:13 am
  • Hi, I encounter this problem: 13/12/10 13:25:15 WARN client.HConnectionManager$HConnectionImplementation: Encountered problems when prefetch META table: java.io.IOException: HRegionInfo was null or ...
    Dec 10, 2013 at 1:30 pm
    Dec 10, 2013 at 2:30 pm
  • Hi, we are taking tsdb data backup using HBase snapshots. We tested the scenario as mentioned below: 1. Created snapshots and exported all snapshots successfully. Exported data contains ...
    Oc tsdbOc tsdb
    Dec 9, 2013 at 11:25 am
    Dec 10, 2013 at 10:47 am
  • I try to delete multiple columns for the same row in HBase. I checked the API for the "Delete" class, method "deleteColumns", and have some confusion. Basically, I am not sure: if I should call ...
    S. ZhouS. Zhou
    Dec 31, 2013 at 1:19 am
    Dec 31, 2013 at 2:30 am
  • Thanks. Should we now go remove the 0.96.1 release from mirrors ?
    Elliott ClarkElliott Clark
    Dec 19, 2013 at 11:39 pm
    Dec 20, 2013 at 2:15 pm
  • hi, folks, we are currently using both calls. They are being deprecated. Wondering what APIs should be used to replacement them? many thanks Demai
    Demai NiDemai Ni
    Dec 17, 2013 at 9:17 pm
    Dec 18, 2013 at 3:04 pm
  • Hi, I'm a newbie to hbase and have a question on the rowkey design and I hope this question isn't to newbie-like for this list. I have a question which cannot be answered by knoledge of code but by ...
    Wilm SchumacherWilm Schumacher
    Dec 16, 2013 at 3:34 pm
    Dec 17, 2013 at 6:16 pm
  • hi friends I want to use a filter in hbase to return rows with different prefix... for eg. my rows structure are <id +URLStrings so i want to return rows with 4 <id prefix : <12234 <4534 <134 <4234 ...
    fateme Abirifateme Abiri
    Dec 17, 2013 at 2:15 pm
    Dec 17, 2013 at 3:31 pm
  • Hi Folks We upgraded our cluster to CDH4.5.0 recently, HBase version is 0.94.6-cdh4.5.0 now. Our client program(written in Python) cannot save data by using Thrift, there are errors happen when we ...
    Ramon WangRamon Wang
    Dec 17, 2013 at 9:15 am
    Dec 17, 2013 at 10:13 am
  • I have just started to experiment with Hbase in our cluster. I have an secure Hbase cluster setup and would like to create an external Hive table around several of our Hbase tables. This works fine ...
    Justin WorkmanJustin Workman
    Dec 9, 2013 at 4:36 pm
    Dec 16, 2013 at 12:40 am
  • I have a distributed Hbase cluster that will not start. It looks like there is a table that is an inconsistent state: 2013-12-10 07:40:50,447 FATAL org.apache.hadoop.hbase.master.HMaster: Unexpected ...
    Daya, RaheemDaya, Raheem
    Dec 10, 2013 at 5:20 pm
    Dec 10, 2013 at 6:46 pm
  • Hi, In a different thread, we were discussing good and better schema designs. In order to really understand why one should or should not do something, its kind of important to understand the ...
    Michael SegelMichael Segel
    Dec 8, 2013 at 5:36 pm
    Dec 10, 2013 at 7:55 am
  • Hi, We are trying to understand how and where exactly LSM tress are used in HBase. Currently as per our understanding, while flushing memstore to Store files and while HFile compaction it is used ...
    AnilKumar BAnilKumar B
    Dec 4, 2013 at 10:50 am
    Dec 9, 2013 at 3:58 pm
  • Any one knows what compaction queue size is meant? By doc's definition: *9.2.5.* hbase.regionserver.compactionQueueSize Size of the compaction queue. This is the number of stores in the region that ...
    Dec 2, 2013 at 6:00 am
    Dec 7, 2013 at 1:25 pm
  • Hi, I have the desire to find the columns that have not been updated for more than a specific time period. So I want to do a scan against the columns with a timerange. The normal behavior of HBase is ...
    Niels BasjesNiels Basjes
    Dec 6, 2013 at 5:42 pm
    Dec 7, 2013 at 2:27 am
  • Hi, While exporting HBase snapshots we need to specify number of mappers to use as mentioned below.To get better performance how many mappers can be used and please let us know based on which ...
    Oc tsdbOc tsdb
    Dec 5, 2013 at 12:58 pm
    Dec 6, 2013 at 2:17 pm
  • Hello, I am seeking some advice on my hbase issue. I am trying to configure a system that will eventually load and store approximately 50GB-80GB of data daily. This data consists of files that are ...
    Bill SanchezBill Sanchez
    Dec 3, 2013 at 11:45 pm
    Dec 4, 2013 at 2:51 am
  • Hi, I have a simple hbase table of approx. 1000 rows. If I invoke the htable.delete() on this table in a while loop - it doesn't throw any error or exception. But at the end of operation - I see that ...
    Mrudula MadirajuMrudula Madiraju
    Dec 2, 2013 at 11:02 pm
    Dec 3, 2013 at 3:46 pm
  • Hi I have some 2000+ of Auto-Region created which I want to make down to a less number. I am using Hbase 0.94, is there a way I can merge the Region without loosing or dirtying up the data. Thanks!
    Vineet MishraVineet Mishra
    Dec 2, 2013 at 1:51 pm
    Dec 2, 2013 at 2:44 pm
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108 users for December 2013

Jean-Marc Spaggiari: 62 posts Ted Yu: 57 posts Lars hofhansl: 21 posts Federico Gaule: 15 posts Amit Sela: 13 posts Oc tsdb: 13 posts Timo Schaepe: 12 posts Gerald Klein: 11 posts Kristoffer Sjögren: 11 posts Tao Xiao: 11 posts Vladimir Rodionov: 10 posts Ados1984: 9 posts Bijieshan: 9 posts Pradeep Gollakota: 9 posts Michael Stack: 8 posts Kevin O'dell: 6 posts Kyle Lin: 6 posts Matteo Bertozzi: 6 posts Ramkrishna vasudevan: 6 posts Rural Hunter: 6 posts
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