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147 discussions - 680 posts

  • Hi all - I'm still dealing with the saga of ScannerTimeoutException, UnknownScannerException, etc. I rewrote my code, in the hope that simply a different approach and some different code paths might ...
    Geoff HendreyGeoff Hendrey
    Sep 11, 2011 at 12:51 am
    Sep 14, 2011 at 5:43 pm
  • Hello, writing a MR-Job to process HBase data and store aggregated data in Oracle. How would you do that in a MR-job? Currently, for test purposes we write the result into a HBase table again by ...
    Steinmaurer ThomasSteinmaurer Thomas
    Sep 16, 2011 at 5:26 am
    Sep 19, 2011 at 1:44 pm
  • Hi, Sending zookeeper-users and hbase-users ml since there may be some cluster developers interested in participating in this project there. I am pleased to announce the initial release of Accord, ...
    OZAWA TsuyoshiOZAWA Tsuyoshi
    Sep 23, 2011 at 2:26 pm
    Sep 27, 2011 at 2:31 am
  • Hi I am using bulk load to insert data into hbase. Its runs fine if I need to insert in one table. But Now, I have the requirement in which I need to insert data into more than one table. But it ...
    Shuja RehmanShuja Rehman
    Sep 22, 2011 at 3:01 pm
    Nov 3, 2011 at 4:53 pm
  • In the master logs, I am seeing "regions in transition timed out" and "region has been PENDING_CLOSE for too long, running forced unasign". Both of these log messages occur at INFO level, so I assume ...
    Geoff HendreyGeoff Hendrey
    Sep 2, 2011 at 8:41 pm
    Nov 14, 2011 at 11:44 pm
  • Hi - I found some odd behavior with ResultScanner.next(). Usually the times for next() are couple hundred ms. But occasionally the call to next spikes VERY long. In fact, I have the timeout set to 60 ...
    Geoff HendreyGeoff Hendrey
    Sep 6, 2011 at 2:11 am
    Sep 8, 2011 at 6:57 pm
  • (Apologies if this has been answered before. I couldn't find anything in the archives quite along these lines.) I have a process which writes to HBase as new data arrives. I'd like to run a ...
    Leif WicklandLeif Wickland
    Sep 9, 2011 at 6:33 pm
    Dec 1, 2011 at 3:34 pm
  • Hi, Can someone answer these basic but important questions for me. We are using hbase for our datastore and want to safeguard ourselves from data corruption/data loss. Also we are hosted on aws ec2. ...
    Vinod Gupta TankalaVinod Gupta Tankala
    Sep 28, 2011 at 4:16 pm
    Sep 28, 2011 at 9:14 pm
  • I have been thinking about backup and point in time recovery (pitr) in HBase. This is mainly needed in case of software errors, or when a customer would ask us to restore some data they accidentally ...
    Lars hofhanslLars hofhansl
    Sep 15, 2011 at 11:11 pm
    Sep 16, 2011 at 6:15 pm
  • I am a HUGE fan of HBase, but our management team wants us to evaluate CitrusLeaf (http://citrusleaf.net/index.php). I have NO idea why! Our management claims that CitrusLeaf is (got to be) faster ...
    Something SomethingSomething Something
    Sep 7, 2011 at 5:25 am
    Sep 8, 2011 at 5:57 pm
  • I wish to store a count of 30-day trailing event data (e.g. # of clicks in past 30 days) and ended up reading the documentation for setTimeRange in the Increment operation. ...
    Jameson LoppJameson Lopp
    Sep 29, 2011 at 6:04 pm
    Oct 4, 2011 at 6:53 pm
  • Hi, I am using the AggregationClient to perform aggregate calculation on a 10 M row hbase table which is spread across around 27 regions. Currently all the regions are on a single region server. Here ...
    Sep 23, 2011 at 9:52 am
    Sep 26, 2011 at 5:55 pm
  • What's the best way to recover from this? Set the start row to last sucessfully processed row + 1 and re-init scanner? java.io.IOException: java.net.SocketTimeoutException: Call to $host failed on ...
    Douglas CampbellDouglas Campbell
    Sep 16, 2011 at 5:19 pm
    Sep 22, 2011 at 10:21 pm
  • Hi all, I have 2 node cluster. I run Regionserver, Zookeeper on both nodes and Master on 1 and Backup Master on other. Here what I did : I stopped Zookeeper on 1 node and after that I was unable to ...
    Stuti AwasthiStuti Awasthi
    Sep 20, 2011 at 7:58 am
    Sep 21, 2011 at 8:35 pm
  • We are running cdh3u1 on centos 5.6 and we have frequent problems shutting down region servers. They get stuck and the only thing I can do to stop them is a kill -9 which is a little harsh. I tried ...
    Jeff WhitingJeff Whiting
    Sep 12, 2011 at 3:25 pm
    Sep 13, 2011 at 9:13 pm
  • Hi All: I don't know what does hole in .META. mean. There is a regions in my cluster have "serverinfo" and "startcode" in .META. without "regioninfo". Is it hole? How did it happned and how to fix it?
    Mingjian DengMingjian Deng
    Sep 5, 2011 at 1:10 am
    Sep 8, 2011 at 3:19 pm
  • Is there a way to prevent regions from splitting while we are running a mapreduce job that does a lot of Puts? It seems that there is a lot of HDFS activity related to the splitting of regions while ...
    Geoff HendreyGeoff Hendrey
    Sep 3, 2011 at 11:33 pm
    Sep 4, 2011 at 10:12 pm
  • Hi folks, most of the users subscribed in this mailing-list are trying to modify the actual source code to add extra functionality to hadoop/HBase. I want to modify hadoop and HBase source code using ...
    Vamshi krishnaVamshi krishna
    Sep 2, 2011 at 3:07 am
    Apr 4, 2012 at 12:19 pm
  • So I have read http://blog.sematext.com/2011/03/11/hbase-backup-options/ The built-in solution, namely the 'Export' and 'Import' classes are relatively straight forward to use, however, the exports ...
    Tom GorenTom Goren
    Sep 8, 2011 at 12:30 am
    Sep 15, 2011 at 10:14 am
  • I believe there is a problem with Hadoop's speculative execution (which is on by default), and HBase's TableOutputFormat. If I understand correctly, speculative execution can launch the same task on ...
    Bryan KellerBryan Keller
    Sep 10, 2011 at 8:22 pm
    Sep 14, 2011 at 9:46 pm
  • Hi, We're running a 33-regionserver hbase cluster on top of cdh3u0 suites. On average, we have 2400 regions hosted on each regionserver. (hbase.hregion.max.filesize is 1.5GB, and we have value size ...
    Xu-Feng MaoXu-Feng Mao
    Sep 6, 2011 at 8:16 am
    Sep 7, 2011 at 2:19 am
  • Hi guys, I've got a table in Hbase let's say "tbl" and I would like to query it using Hive. Therefore I mapped a table to hive as follows: CREATE EXTERNAL TABLE tbl(id string, data map<string,string ...
    Matthew TovbinMatthew Tovbin
    Sep 18, 2011 at 11:13 am
    Sep 30, 2011 at 4:50 pm
  • I am trying to install hbase and hadoop on as standalone on mac. Is there any tutorial that will show me the best way to do this. I
    Sep 30, 2011 at 5:18 am
    Sep 30, 2011 at 2:33 pm
  • i want to read text file (sample given below) separated with semicolon(;) using mapper. Each one record is separated with semicolon(;). Should i write my own custom input format class? OR Is there ...
    Arsalan BilalArsalan Bilal
    Sep 29, 2011 at 2:24 pm
    Sep 30, 2011 at 12:36 pm
  • When using an HTablePool and calling get() or scan() can I return the Table to the pool as soon as I have the Result of Scanner object? i.e. is this valid? HTablePool pool = myPool; Get get = myGet; ...
    Joel HalbertJoel Halbert
    Sep 27, 2011 at 9:19 am
    Sep 29, 2011 at 9:17 am
  • Hello, I have an HBase 0.90.3 fleet with more than 100 hosts distributed across 3 datacenters. Yesterday, we experienced some network issues for several minutes and the region servers from one data ...
    Bogdan GhidireacBogdan Ghidireac
    Sep 21, 2011 at 8:07 am
    Sep 22, 2011 at 9:25 am
  • Currently I am using RDBMS in my project. My project basically monitor servers. It has to collect the information from all the servers ( no. of servers could be very huge) every 5 minutes and store ...
    Sep 14, 2011 at 10:02 am
    Sep 14, 2011 at 10:34 pm
  • Hi, Firstly, I have read in the mailing list before that having more than 1 column family is not recommended. I am more interested to know whether it is a problem in my use case as well or not. I ...
    Imran M YousufImran M Yousuf
    Sep 9, 2011 at 5:08 am
    Sep 13, 2011 at 4:35 am
  • Hi While running in the midst of my map-red testing an exception keeps coming over and over, 11/09/12 12:30:26 INFO mapred.JobClient: Cleaning up the staging area ...
    Jimson K. JamesJimson K. James
    Sep 12, 2011 at 7:23 am
    Sep 12, 2011 at 10:49 am
  • Hi Friends, I am storing my data in Hbase. I want to do search using Solr. I can't find much documentation about the integration. Is there any documentation to integrate these two. Please Suggest ...
    Stuti AwasthiStuti Awasthi
    Sep 29, 2011 at 9:53 am
    Sep 30, 2011 at 11:01 pm
  • Hi, I saw a posting from a year or so ago where Andy said he was running datanodes with xcievers set to 10k Is there any problem doing that? We were running with a 9 regionserver/datanode cluster and ...
    Robert J BergerRobert J Berger
    Sep 27, 2011 at 6:47 am
    Sep 28, 2011 at 5:02 pm
  • I find this hard to believe. For the same row key, my java client is throwing wrong region exception. But I can query the same using hbase shell. Im on 0.90.2 version. Also note that I have ...
    Vinod Gupta TankalaVinod Gupta Tankala
    Sep 27, 2011 at 2:57 pm
    Sep 28, 2011 at 12:24 am
  • I wanted to do a poll on what compression libraries people are using and why. We currently use lzo but are considering other alternatives for various reasons. We would like to move to CDH3 but adding ...
    Sep 14, 2011 at 12:34 pm
    Sep 16, 2011 at 9:15 pm
  • Hi all I have an article online, that shows how do some quick benchmarks on a HBase cluster. http://sujee.net/tech/articles/hbase-performance-testing/ feedbacks / thoughts welcome. thanks very much ...
    Sujee ManiyamSujee Maniyam
    Sep 12, 2011 at 7:23 am
    Sep 14, 2011 at 6:13 pm
  • Hi, when I try to create a table via the REST interface: curl -v -X PUT \ 'http://localhost:8080/test/schema' \ -H "Accept: application/json" \ -H "Content-Type: application/json" \ -d ...
    Karel MinaříkKarel Minařík
    Sep 13, 2011 at 8:16 pm
    Sep 14, 2011 at 5:59 am
  • I have generated Hfile using Java program,Now i am trying to put data in habse using Bulk Import command line Tool. The command i am using for Bulk Import hadoop jar <Hbase Jar File Path ...
    Arsalan BilalArsalan Bilal
    Sep 12, 2011 at 8:29 am
    Sep 13, 2011 at 3:16 pm
  • Hi folks- Stack deployed the book update last night and this contains some new material (more MapReduce examples). http://hbase.apache.org/book.html Plus, the book and website contain the new logo! ...
    Doug MeilDoug Meil
    Sep 7, 2011 at 10:30 pm
    Sep 8, 2011 at 3:38 am
  • Hi All. I am trying to generate Hfiles for bulk import. but i am getting the following exception. The hbase table has only 1 column family attempt_201109091959_0002_r_000000_0: log4j:WARN No ...
    Shuja RehmanShuja Rehman
    Sep 9, 2011 at 3:55 pm
    Dec 28, 2011 at 7:57 pm
  • Hi, I am wondering what is the best way to query a record when only the leading and trailing letters of a row are known. For example, if my row looks something like: event_type-timestamp-eventid If i ...
    Sam SeigalSam Seigal
    Sep 30, 2011 at 1:28 am
    Sep 30, 2011 at 8:32 pm
  • Hi, I am trying to setup a test system to host a distributed hbase installation. No matter what I do, I get the below errors. 2011-09-28 22:17:26,288 WARN org.apache.hadoop.hdfs.DFSClient: Error ...
    Vinod Gupta TankalaVinod Gupta Tankala
    Sep 28, 2011 at 10:22 pm
    Sep 29, 2011 at 10:26 pm
  • Hello, when running a MR-Job reading from HBase with a JDBC output writing to a RDBMS, this uses JDBC batch operations. The accumulated batch is then executed and committed in DBRecordWriter.close. ...
    Steinmaurer ThomasSteinmaurer Thomas
    Sep 26, 2011 at 12:36 pm
    Sep 28, 2011 at 5:49 am
  • I want to implement *secondary indexes *in* HBase-0.90.1-cdh3u0**. *I know that there is no native support available in Hbase. But can you tell me any other way to implement this? Can you refer any ...
    Arsalan BilalArsalan Bilal
    Sep 21, 2011 at 1:09 pm
    Sep 22, 2011 at 2:00 pm
  • Hello, when writing/executing a self-written MR-Job. How are you guys handle custom properties? As command-line arguments when starting the MR-job or via a property file? Thanks! Regards, Thomas
    Steinmaurer ThomasSteinmaurer Thomas
    Sep 21, 2011 at 8:06 am
    Sep 22, 2011 at 5:54 am
  • Hi All, I was running a 2 node cluster with 1 zookeeper node and 2 region server node. I had also setup cluster replication with another single node Hbase-Hadoop cluster. Replication was successful ...
    Stuti AwasthiStuti Awasthi
    Sep 19, 2011 at 5:15 am
    Sep 20, 2011 at 5:38 am
  • http://www.downforeveryoneorjustme.com/hbaseblog.com says it is not just me. Best regards, - Andy Problems worthy of attack prove their worth by hitting back. - Piet Hein (via Tom White)
    Andrew PurtellAndrew Purtell
    Sep 14, 2011 at 10:52 pm
    Sep 15, 2011 at 5:34 pm
  • Hi all, How are you? I am new to hbase and all I have been doing for the past week is reading information exists on the web. My goal is to master HBase from the System Administrator point of view and ...
    Ronen ItkinRonen Itkin
    Sep 13, 2011 at 10:16 am
    Sep 13, 2011 at 9:40 pm
  • OK. Here is the summary of what I know: A region server, after some amount of scanning, can begin to get ClosedChannelException when it tries to respond to the client. Unfortunately, this only ...
    Geoff HendreyGeoff Hendrey
    Sep 12, 2011 at 12:52 am
    Sep 12, 2011 at 5:21 pm
  • Hi , We are counting events for our application. Sometimes, the same event arrives multiple times. This leads to counting of same event multiple times. Is there a way I can avoid this ? (Say ...
    Sagar naikSagar naik
    Sep 2, 2011 at 6:08 pm
    Sep 9, 2011 at 3:12 pm
  • Hi, I have Hbase server on distant machine. I want to test my java code through my eclipse. So to achieve this I created Hbase connection : Code is : public static HBaseConfiguration conf = new ...
    Stuti AwasthiStuti Awasthi
    Sep 7, 2011 at 12:11 pm
    Sep 8, 2011 at 10:58 am
  • Hello, we are storing detailed measurement values in a Hadoop/Hbase cluster. For end-user / analysis tasks, we need to provide aggregated values along a date dimension (aggregate by day, month, ...
    Steinmaurer ThomasSteinmaurer Thomas
    Sep 2, 2011 at 6:07 am
    Sep 5, 2011 at 10:24 am
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139 users for September 2011

Stack: 66 posts Jean-Daniel Cryans: 51 posts Geoff Hendrey: 47 posts Stuti Awasthi: 37 posts Doug Meil: 24 posts Steinmaurer Thomas: 21 posts Andrew Purtell: 17 posts Arsalan Bilal: 15 posts Michel Segel: 14 posts Sonal Goyal: 13 posts Lars hofhansl: 12 posts Vinod Gupta Tankala: 11 posts Harsh J: 10 posts Joey Echeverria: 10 posts Buttler, David: 9 posts Eric Charles: 9 posts Mayuresh: 9 posts Sam Seigal: 9 posts OZAWA Tsuyoshi: 8 posts Douglas Campbell: 7 posts
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