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152 discussions - 753 posts

  • Hadoop Namenode reports the following error which is unusual : 013-08-21 09:21:12,328 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server localhost/ Will not ...
    Pavan SudheendraPavan Sudheendra
    Aug 21, 2013 at 10:41 am
    Aug 25, 2013 at 5:31 am
  • Hi, We are running a stress test in our 5 node cluster and we are getting the expected mean latency of 10ms. But we are seeing around 20 reads out of 25 million reads having latency more than 4 ...
    Saurabh YahooSaurabh Yahoo
    Aug 28, 2013 at 12:11 pm
    Aug 30, 2013 at 8:36 am
  • Hi, I am finding an odd behavior with the Coprocessor performance lagging a client side Get. I have a table with 500000 rows. Each have variable # of columns in one column family (in this case about ...
    Kiru PakkirisamyKiru Pakkirisamy
    Aug 9, 2013 at 1:44 am
    Aug 19, 2013 at 3:35 pm
  • hello, I am using apache hadoop 1.1.2 and hbase 0.94.9 on pseudo distibuted mode. I am trying to find Average open stocks values. *sample dataset in hbase::**(table name:nyse4)* 2010-02-04 ...
    Manish dunaniManish dunani
    Aug 16, 2013 at 10:43 am
    Aug 19, 2013 at 2:12 pm
  • Hi guys, I am running cloudera quick start vm: Versions: Hadoop: 2.0.0-cdh4.3.1 HBase: 0.94.6-cdh4.3.1 Here is my little remote HBase Java client(HbaseClient.java), all it does is: public static void ...
    Shengjie MinShengjie Min
    Aug 25, 2013 at 12:00 pm
    Aug 26, 2013 at 3:10 am
  • Hi there, I am testing out newly added snapshot capability, ExportSnapshot in particular. Its working fine for me. I am able to run ExportSnapshot properly. But the biggest (noob) issue is, once ...
    Siddharth KarandikarSiddharth Karandikar
    Aug 1, 2013 at 1:35 pm
    Aug 3, 2013 at 9:55 am
  • My master keep logging that: 2013-07-31 21:52:59,201 WARN org.apache.hadoop.hbase.master.AssignmentManager: Region 270a9c371fcbe9cd9a04986e0b77d16b not found on server node7,60020,1375319044055 ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Aug 1, 2013 at 12:24 pm
    Aug 1, 2013 at 6:30 pm
  • Hi all, I set up 2 node hbase cluster and i created a table and pumped 10million records. I set the in hbase-site.xml the following property as shown. <property <name hbase.hregion.max.filesize</name ...
    Vamshi KrishnaVamshi Krishna
    Aug 23, 2013 at 11:47 am
    Aug 28, 2013 at 1:35 pm
  • i read in multiple places that i should try to limit the number of column families in hbase. do i understand it correctly that when i create lots of tables, but they all use the same column family ...
    Koert KuipersKoert Kuipers
    Aug 22, 2013 at 3:07 pm
    Aug 24, 2013 at 4:31 pm
  • I'm running: CDH4.1.2 HBase 0.92.1 Hadoop 2.0.0 Is there an issue with restarting a standby cluster with replication running? I am doing the following on the standby cluster: - stop hmaster - stop ...
    Patrick SchlessPatrick Schless
    Aug 1, 2013 at 9:18 pm
    Aug 8, 2013 at 6:49 pm
  • Well done, Rajesh!
    Nicolas LiochonNicolas Liochon
    Aug 13, 2013 at 6:47 am
    Aug 16, 2013 at 3:12 pm
  • Hi About the internals of locking a row in hbase. Does hbase row locks map one-to-one with a locks in zookeeper or are there any optimizations based on the fact that a row only exist on a single ...
    Kristoffer SjögrenKristoffer Sjögren
    Aug 28, 2013 at 10:15 pm
    Aug 29, 2013 at 11:45 am
  • Hi all, I want to add some dynamic behavior to my observer cp, say: postPut(){ if(flag) {do function1()}; else {do function2()} } Is there a way to dynamically change the value of flag? One Feasible ...
    Wei TanWei Tan
    Aug 22, 2013 at 4:37 pm
    Aug 23, 2013 at 3:39 am
  • Hi all, A serious question.. I know this isn't one of the best hbase practices but I really want to know.. I am doing a join across 3 table in hbase.. One table contain 19m records, one contains 2m ...
    Pavan SudheendraPavan Sudheendra
    Aug 22, 2013 at 3:25 pm
    Aug 22, 2013 at 5:59 pm
  • Hi all, I'm getting the following error messages everytime i run the map-reduce job across multiple hadoop clusters: java.lang.NullPointerException at ...
    Pavan SudheendraPavan Sudheendra
    Aug 19, 2013 at 1:04 pm
    Aug 22, 2013 at 3:19 pm
  • Hi , Devs/Users ; Recently I use HBase API to insert big data into hbase;It's about 77G and my cluster has one hbase-master,two hbase-regionservers ; When the program executes a period of time, the ...
    Aug 13, 2013 at 3:00 pm
    Aug 20, 2013 at 2:17 pm
  • Hi, I am newbie to Hbase and Hadoop. I am trying to configure Hbase and Hadoop in pseudo distributed mode. I have few questions. 1) what should hbase.cluster.distributed be set to in hbase-site.xml ...
    Vinay MehtaVinay Mehta
    Aug 15, 2013 at 7:15 am
    Aug 15, 2013 at 2:02 pm
  • bq. Each has a DB associated They're RDBMS, I assume ? Have you looked at Sqoop ?
    Ted YuTed Yu
    Aug 1, 2013 at 4:13 pm
    Aug 5, 2013 at 2:31 am
  • hi,all: any good idea? thanks
    Ch huangCh huang
    Aug 28, 2013 at 3:08 am
    Aug 29, 2013 at 11:33 am
  • Hello all, I set up a 2 node hbase cluster. I inserted million rows in to hbase table. Machine1-master and region server machine-2-only region server. After the insertion completed, Still i see the 4 ...
    Vamshi KrishnaVamshi Krishna
    Aug 23, 2013 at 2:01 pm
    Aug 26, 2013 at 12:13 pm
  • Hi all, I'm using custom filters to retrieve filtered data from HBase using the native api. I noticed that the class full names of those custom filters is being sent as the bytes representation of ...
    Pablo MedinaPablo Medina
    Aug 20, 2013 at 3:56 pm
    Aug 22, 2013 at 12:55 pm
  • Hi everyone, Let's say, I have a table(A) where every time I write a coprocessor, hooked to postPut, writes in other table (B). I can't find anywhere what happen if the coprocessor fails or can't ...
    Federico GauleFederico Gaule
    Aug 21, 2013 at 1:02 pm
    Aug 22, 2013 at 1:35 am
  • my workmate tell me hbase is very slow for scan something ,i check the region server find the following information,anyone can help? 13/08/06 15:30:34 WARN ipc.HBaseServer: IPC Server listener on ...
    Ch huangCh huang
    Aug 6, 2013 at 7:39 am
    Aug 7, 2013 at 1:48 am
  • I have a weird (and a pretty serious) issue on my HBase cluster. Whenever one of my zookeeper server goes down, already running services work fine for a few hours but when I try to restart any ...
    Dhaval ShahDhaval Shah
    Aug 6, 2013 at 2:49 pm
    Aug 6, 2013 at 6:47 pm
  • I have configured hbase 94.9 with kerberos successfully for authentication and authorization as mentioned in the CDH security docs. I am using sqoop 1.4.3. Is there any configuration required from ...
    Suhas SatishSuhas Satish
    Aug 5, 2013 at 9:54 pm
    Aug 6, 2013 at 5:40 pm
  • Hi! Is there a way to scan a HBase table getting, for example, the first 100 results, then later get the next 100 and so on... Just like in SQL we do with LIMIT and OFFSET? *Jonathan Cardoso** ** ...
    Jonathan CardosoJonathan Cardoso
    Aug 1, 2013 at 5:01 pm
    Aug 2, 2013 at 12:56 am
  • Hi, we are managing some naturally time versioned data in HBase. That is, there are change events that have a specific time set and when such event is handled, data in HBase, pertaining to the exact ...
    Henning BlohmHenning Blohm
    Aug 10, 2013 at 1:27 pm
    Aug 31, 2013 at 10:10 am
  • Hi all, I am trying to write a MR code to load a HBase table. I have a mapper that emits (null,put object) and I am using TableMapReduceUtil.initTableReducerJob() to write it into a HBase table ...
    Praveenesh kumarPraveenesh kumar
    Aug 29, 2013 at 9:47 am
    Aug 29, 2013 at 5:44 pm
  • To answer your question - Go to HBase Web UI and you can initiate a manual split on the table. But, before you do that. May be you can try increasing your client caching value ...
    Ashwanth KumarAshwanth Kumar
    Aug 26, 2013 at 8:53 am
    Aug 26, 2013 at 10:52 am
  • Hi I setup a hbase cluster of 2 machines. Master Machine (vamshi_RS) running both master & Regionserver slave machine - Running only Region server. After i ran start-hbase.sh all the daemons are ...
    Vamshi KrishnaVamshi Krishna
    Aug 22, 2013 at 10:02 am
    Aug 23, 2013 at 11:26 am
  • Hi, I am running Hbase in pseudo distributed mode on top HDFS. Recently , i was facing problems related to long GC pauses. When i read in official documentation , its suggested to increase zookeeper ...
    Vimal JainVimal Jain
    Aug 20, 2013 at 7:12 am
    Aug 21, 2013 at 12:38 pm
  • hi,all i have data (data is very huge) with user id ,session id ,and visit time. my query pattern is ,"find all user id in certain time range,find one user's all session id ,and find all session id ...
    Ch huangCh huang
    Aug 16, 2013 at 9:34 am
    Aug 19, 2013 at 5:19 pm
  • Anyone know if the prefix filter[1] does a full table scan? 1 - http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/PrefixFilter.html
    Sudarshan Kadambi (BLOOMBERG/ 731 LEXIN)Sudarshan Kadambi (BLOOMBERG/ 731 LEXIN)
    Aug 12, 2013 at 6:02 pm
    Aug 16, 2013 at 5:21 am
  • I am fairly new to the hadoop-hbase environment having started working on it very recently, so I hope I am wording the question correctly. I am trying to read data from a hadoop-hbase table which has ...
    Narlin MNarlin M
    Aug 9, 2013 at 7:45 pm
    Aug 10, 2013 at 5:13 am
  • Hi all, I have an hbase system that has worked fine for quite a long time, but now it is quite suddenly developing errors. First it was dying immediately on startup because there wasn't a copy of ...
    Trevor AntczakTrevor Antczak
    Aug 5, 2013 at 4:16 pm
    Aug 9, 2013 at 6:22 pm
  • Hi, I have configured Hbase in pseudo distributed mode with HDFS as underlying storage.I am not using map reduce framework as of now I have 4GB RAM. Currently i have following distribution of memory ...
    Vimal JainVimal Jain
    Aug 4, 2013 at 1:34 pm
    Aug 8, 2013 at 6:37 pm
  • hello, I wrote the programme to insert the data into hbase table.. *code:* package maddy.test; import java.io.IOException; import org.apache.hadoop.conf.Configuration; import ...
    Manish dunaniManish dunani
    Aug 7, 2013 at 1:03 pm
    Aug 7, 2013 at 1:57 pm
  • Hello all, I have an use case where I need to write 1 million to 10 million records periodically (with intervals of 1 minutes to 10 minutes), into an HBase table. Once the insert is completed, these ...
    Gautam BorahGautam Borah
    Aug 23, 2013 at 7:11 am
    Aug 24, 2013 at 4:56 am
  • Hi guys, I have the following questions in HBASE 0.90.6 1. Does hbase use only one compaction thread to handle both major and minor compaction? 2. If hbase uses multiple compaction threads, which ...
    Monish rMonish r
    Aug 19, 2013 at 9:48 am
    Aug 20, 2013 at 5:37 pm
  • I have setup HBase replication. I want to know how out of date my replicant cluster is. How does one monitor that? -Alex Newman
    Alex NewmanAlex Newman
    Aug 19, 2013 at 7:43 pm
    Aug 19, 2013 at 9:43 pm
  • Hi, I am using Hadoop and Hbase in pseudo distributed mode. I am using Hadoop version - 1.1.2 and Hbase version - 0.94.7 Recently i found some exception in hadoop and hbase logs. I am not sure what ...
    Vimal JainVimal Jain
    Aug 13, 2013 at 8:59 am
    Aug 13, 2013 at 3:51 pm
  • Based on the previous work using async libraries to index HBase into elastic search, I've created. https://github.com/posix4e/Elasticsearch-HBase-River This river uses the replication feature in ...
    Alex NewmanAlex Newman
    Aug 5, 2013 at 10:06 pm
    Aug 6, 2013 at 5:03 pm
  • Hi everyone . tl;dr? Any hints on where to start with puppetization of my hbase stack would be much appreciated. Here goes.. This is an open quesiton about puppet and hbase - any deployment stories ...
    Jay VyasJay Vyas
    Aug 5, 2013 at 2:52 pm
    Aug 6, 2013 at 3:54 pm
  • Hi All, I didn't find a site or blog with all shell commands at one place, so I have collected all of them here. This may be helpful for some people(mainly new comers).
    Rajeshbabu chintaguntlaRajeshbabu chintaguntla
    Aug 2, 2013 at 2:53 pm
    Aug 2, 2013 at 7:13 pm
  • Hi, i catch NPE when i try restore my snapshot. Snapshot is taken from online table and exported to another cluster via: hbase org.apache.hadoop.hbase.snapshot.ExportSnapshot -snapshot ...
    Lukáš DrbalLukáš Drbal
    Aug 31, 2013 at 6:26 pm
    Sep 3, 2013 at 10:56 am
  • See below a null endpoint which takes 60-70msec on my 4 node ec2 cluster for a table with 45 regions. When I run 64 concurrent clients for this the latency jumps to 3000-3700 msec. (zookeeper ...
    Kiru PakkirisamyKiru Pakkirisamy
    Aug 30, 2013 at 8:49 am
    Sep 1, 2013 at 7:41 am
  • I have restart my cluster and I'm now waiting for this task to end: Doing distributed log split in [hdfs://node3:9000/hbase/.logs/node1,60020,1377789460683-splitting] It's running fir now 30 ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Aug 29, 2013 at 4:04 pm
    Aug 29, 2013 at 6:13 pm
  • HI All, We have a very heavy map reduce job that goes over entire table with over 1TB+ data in HBase and exports all data (Similar to Export job but with some additional custom code built in) to ...
    Ameya KanitkarAmeya Kanitkar
    Aug 28, 2013 at 3:01 pm
    Aug 29, 2013 at 12:48 am
  • Hi, I have a use case in which I need to store segments of mp3 files in hbase. A song may come to the application in different ovelapping segments. For example, a 5 min song can have the following ...
    Anand NalyaAnand Nalya
    Aug 27, 2013 at 2:13 pm
    Aug 28, 2013 at 9:28 am
  • Hi, I have developed a coprocessor that is extending BaseRegionObserver and implements the postPut method. The postPut method scans the columns of the row that the put was issued on and calculates an ...
    Olle MårtenssonOlle Mårtensson
    Aug 26, 2013 at 2:28 pm
    Aug 27, 2013 at 7:08 am
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135 users for August 2013

Ted Yu: 78 posts Jean-Marc Spaggiari: 66 posts Pavan Sudheendra: 43 posts Kiru Pakkirisamy: 33 posts 闫昆: 18 posts Manish dunani: 17 posts Ch huang: 16 posts Vimal Jain: 15 posts Lars hofhansl: 14 posts Michael Stack: 14 posts Vladimir Rodionov: 14 posts Kevin O'dell: 13 posts Vamshi Krishna: 13 posts Patrick Schless: 12 posts Shahab Yunus: 11 posts Anil Gupta: 10 posts Jean-Daniel Cryans: 10 posts Saurabh Yahoo: 10 posts Dhaval Shah: 9 posts Michael Segel: 9 posts
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