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89 discussions - 488 posts

  • Hi all; I posted this as a question on StackOverflow as well but realized I should have gone straight ot the horses-mouth with my question. Sorry for the double post! We are running a series of HBase ...
    Michael GrundvigMichael Grundvig
    Nov 4, 2013 at 3:47 am
    Nov 6, 2013 at 7:57 pm
  • Hi, Have anyone ran into a case where a Region Server is hosting regions, in which some regions are getting lots of write requests, and the rest gets maye 1/1000 of the rate of write requests? This ...
    Asaf MesikaAsaf Mesika
    Nov 14, 2013 at 9:00 am
    Nov 20, 2013 at 5:18 pm
  • Hi to All this is the first time, i have launched the example PutWriteBufferExample, chapter 3 of the "hbase definitive guide" in a working hadoop cluster and returns this error Caused by ...
    Silvio Di gregorioSilvio Di gregorio
    Nov 22, 2013 at 11:18 am
    Nov 25, 2013 at 2:25 pm
  • Hi All, When stopping master or regionserver, I found some ERROR and WARN in the log files, are these errors can cause problem in hbase: 13/11/21 09:31:16 INFO zookeeper.ClientCnxn: EventThread shut ...
    Henry HungHenry Hung
    Nov 21, 2013 at 1:44 am
    Nov 27, 2013 at 9:05 pm
  • Hello, We experience reliability problems when running M/R jobs over HBase tables. Specifically, it suffices for one Region Server to crash in order to fail all M/R jobs. My guess is that this is not ...
    David KochDavid Koch
    Nov 22, 2013 at 3:14 pm
    Nov 25, 2013 at 4:34 pm
  • Hello, I use hbase to store my data which comes from a crawler. These data are indexed from hbase to Solr. But I have a problem with hBase. As I have larger DB now, everytime I try to index data from ...
    Nov 12, 2013 at 12:05 pm
    Nov 16, 2013 at 10:50 am
  • Hi Folks It seems to be impossible, but I still want to check if there is a way we can do "complex" query on HBase with "Order By", "JOIN".. etc like we have with normal RDBMS, we are asked to ...
    Ramon WangRamon Wang
    Nov 29, 2013 at 7:44 am
    Dec 2, 2013 at 7:11 pm
  • Hi, can someone please let us know if we can export snapshots data directly to outside of cluster without copying to local. Please refer us if there are any blog with example. Below command is ...
    Oc tsdbOc tsdb
    Nov 29, 2013 at 12:03 pm
    Dec 1, 2013 at 3:05 pm
  • Hi all, I am looking for some performance suggestions. I would like to get all the keys of table (wich contains ~100 million rows). Currently, I am doing a FTS with FirstKeyOnlyFilter and ...
    Jilal OussamaJilal Oussama
    Nov 22, 2013 at 3:25 pm
    Nov 23, 2013 at 11:56 am
  • Hi, I'm trying to determine the best way to serialize a sequence of integers/strings that represent a hierarchy for a column qualifier, which would be compatible with the ColumnPrefixFilters, and ...
    Nasron CheongNasron Cheong
    Nov 1, 2013 at 4:00 am
    Nov 10, 2013 at 9:04 pm
  • Hi, I have a problem with the memory. My use case is the following: I've crated a MapReduce-job and iterate in this over every row. If the row has more than for example 10k columns I will create a ...
    Nov 1, 2013 at 1:49 pm
    Nov 3, 2013 at 11:13 pm
  • Hi, I'm using HBase 0.94.12 above Hadoop 1.2.1 and I have one node for zookeeper, one node for a Namenode/Hmaster and three Datanode/Regionservers. All the machines are on Amazon EC2, instance ...
    Nov 28, 2013 at 10:14 am
    Dec 4, 2013 at 11:20 am
  • I am using CDH 4.3.1 with HBase 0.94.6. Using Cloudera manager, I notice a metric called Average RPC Queue Time is abnormal. It is over 3 hours normally and drops to a few minutes during non-peak ...
    Shawn HermansShawn Hermans
    Nov 20, 2013 at 4:31 pm
    Nov 20, 2013 at 7:16 pm
  • @Demai, We actually have 10 clusters in different locations. The replication scope is not an issue for me since I have only one column family and we want it replicated to each location. Can you ...
    Ishan ChhabraIshan Chhabra
    Nov 8, 2013 at 10:30 pm
    Nov 9, 2013 at 3:37 am
  • ...... 2013-11-27 18:26:18,102 FATAL org.apache.hadoop.hbase.master.HMaster: Master server abort: loaded coprocessors are: [] 2013-11-27 18:26:18,102 FATAL org.apache.hadoop.hbase.master.HMaster ...
    Jiajun ChenJiajun Chen
    Nov 27, 2013 at 11:22 am
    Nov 28, 2013 at 12:12 pm
  • Hi, I am trying to install snappy compression for HBase. I believe I have installed the library and wanted to check by using the CompressionTest utility. I am issuing the following command: bin/hbase ...
    Nov 27, 2013 at 2:58 pm
    Nov 27, 2013 at 5:02 pm
  • Hi All, How can we configure Hbase inorder to perform multythreading/parallel query faster . These are some bits from my analysis: Each Thread contain 10 query ( Random) Tread H2(Msec) Phoenix(Msec) ...
    Job ThomasJob Thomas
    Nov 26, 2013 at 8:27 am
    Nov 27, 2013 at 3:04 pm
  • Hi all, Out of these property , which one is used to set HFile block size in hbae 0.94.12 hbase.hregion.max.filesize=16384 hfile.min.blocksize.size=16384 ...
    Job ThomasJob Thomas
    Nov 26, 2013 at 3:42 am
    Nov 26, 2013 at 6:14 am
  • Hi all, I am thinking about using Random Forest to do churn analysis with Hbase as NoSQL data store. Currently, we have all the user history (basically many type of event data) resides in S3 & ...
    Sam WuSam Wu
    Nov 13, 2013 at 11:27 pm
    Nov 14, 2013 at 5:45 pm
  • Hi Folks I'm trying to change the default split policy of an existing table in HBase 0.94.6-cdh4.4.0. The way i think should work is by using HBase Shell, so i executed the following command in the ...
    Nov 5, 2013 at 9:57 am
    Nov 6, 2013 at 7:02 am
  • Hi All, I want to fetch some rows from a table where the value for the Qualifier(say name) is any of ("joseph" ,"sandy", "lar" ) and another Qualifier(say flag) should always be 1. I am making multi ...
    Vineet MishraVineet Mishra
    Nov 26, 2013 at 12:18 pm
    Nov 26, 2013 at 5:54 pm
  • HI, I wonder is there any way to limit the "HBaseAdmin#checkHBaseAvailable" method time cost. As i use the "HBaseAdmin#checkHBaseAvailable" method to test if the hbase master is connectable. But if ...
    Nov 13, 2013 at 2:49 am
    Nov 14, 2013 at 6:34 am
  • Hi, I have a cluster with 7 regionserver. Some of them are crashing from time to time wihtout any error message in the hbase log. If I take a look at the log at the time I found this: 2013-11-07 ...
    Nov 7, 2013 at 3:52 pm
    Nov 9, 2013 at 12:53 am
  • There are a lot of discussions here regarding the row design but I have a question about the value design: Say I have a table t1 with rows r1,r2...rn and family f. I also have qualifiers q1,q2...,qm ...
    Amit SelaAmit Sela
    Nov 28, 2013 at 1:09 pm
    Nov 28, 2013 at 10:00 pm
  • Hi all, I've been running into an error of late whose root cause I'm not able to decipher. Before this I had been able to run HBase on top of HDFS without any issues. Suddenly HMaster shut down one ...
    Bharat ShettyBharat Shetty
    Nov 22, 2013 at 6:50 am
    Nov 25, 2013 at 5:39 am
  • Hi, I have a 0.94 (hadoop 1.0.3) cluster that I want to migrate to a 0.96 (hadoop 2.2.0) cluster. However, there is no network connection between the 2 clusters... What's the best way to do that? I ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Nov 10, 2013 at 7:35 pm
    Nov 11, 2013 at 5:28 pm
  • Hi, If I have a question about the setCaching function. As I know the caching value influence how many rows will be cached in the memory of the region server. So for example I have 10 rows with 20k ...
    Nov 4, 2013 at 5:19 pm
    Nov 4, 2013 at 10:11 pm
  • I have created table in hbase via phoenix. Why hbase table is not droped after deleted it from Phoenix and vise versa.? Why deleting a table from Phoenix takes considerably more time than deleting it ...
    Job ThomasJob Thomas
    Nov 29, 2013 at 4:28 am
    Nov 29, 2013 at 6:19 am
  • Hi, Couple of hours back all of sudden NameNode of our production cluster got stopped responding, due to this our HBase also stopped responding(as expected). Here mysterious thing is we unable to get ...
    Sandeep LSandeep L
    Nov 27, 2013 at 5:00 am
    Nov 28, 2013 at 8:59 am
  • I want to get the metadata information in Hbase. My basic purpose is to - 1.get the information about tables like how many tables and name of tables. 2.get the columnfamilies name in each table ...
    Nov 25, 2013 at 4:19 pm
    Nov 25, 2013 at 8:08 pm
  • Hi , I am getting the query performance in Hbase 0.20.6 and hadoop 0.20.2 around 0.002 sec(2 millisec) but in Hbase 0.94.12 and hadoop 1.0.4 around 0.02 sec(20 millisec) , considerably very less as ...
    Job ThomasJob Thomas
    Nov 22, 2013 at 3:43 pm
    Nov 25, 2013 at 5:46 am
  • We are looking to use hbase as a transformation engine. In other words, take data already loaded into hbase, run some large calculation/aggregation on that data and then load it back into a rdbms for ...
    Nov 11, 2013 at 3:51 pm
    Nov 18, 2013 at 6:57 pm
  • Hi, Is there any way to get HBase reqd and write counts separately.HBase default web interface will show by combining read and write requests as requestsPerSecond. Instead of requestsPerSecond can I ...
    Sandeep LSandeep L
    Nov 13, 2013 at 5:41 am
    Nov 17, 2013 at 6:41 pm
  • Hi, In recent times we are seeing frequent scan time outs in multiple region servers of our production cluster. Due to this our HBase cluster is not responding for 5 to 10 minutes for any queries & ...
    Sandeep LSandeep L
    Nov 14, 2013 at 10:24 am
    Nov 15, 2013 at 4:12 am
  • Hi, Is there anything I missed for my copyTable command? hbase@node3:~/hbase-0.94.12$ bin/hbase org.apache.hadoop.hbase.mapreduce.CopyTable --endtime=1384395265000 --peer.adr=hbasetest1:2181:/hbase ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Nov 14, 2013 at 3:08 am
    Nov 15, 2013 at 1:48 am
  • Hi all, I have two questions 1) In HBASE, is it possible to delete a row based on a column name & value. The column name should not be a row key, because in this scenario we cannot delete based on ...
    Raviprasad TRaviprasad T
    Nov 6, 2013 at 9:15 am
    Nov 8, 2013 at 5:19 am
  • Dear, Recently when I use CDH 4.0 to do M/R job. I always let Region Server Crashed. Attached are region server logs. And In my M/R program , I set job reduceTaskNum to 4. Because I have two data ...
    Nov 8, 2013 at 3:32 am
    Nov 8, 2013 at 4:15 am
  • We have an application where a row can contain anywhere between 1 and 3600000 cells (there's only 1 column family). In practice, most rows have under 100 cells. Now we want to run some mapreduce jobs ...
    Patrick SchlessPatrick Schless
    Nov 4, 2013 at 11:03 pm
    Nov 5, 2013 at 12:42 am
  • Hi, All! Recently, I just test the Client write performance with HBase Java API. I think the performance X-factor is : 1) client buffer size; 2) server memstore size; But when i did the test, I have ...
    Nov 26, 2013 at 8:55 am
    Nov 28, 2013 at 7:33 pm
  • Hi everyone, I have in mind upgrading my productive cluster from 0.94.7 to 0.94.13. Rolling upgrade is recommended (http://hbase.apache.org/upgrading.html) . What is the step by step for that? I ...
    Federico GauleFederico Gaule
    Nov 26, 2013 at 3:25 pm
    Nov 27, 2013 at 5:33 pm
  • Hi all, I've read a lot of good things about Phoenix here and I have a few questions that maybe some of you, who already use Phoenix, can help me with: How does Phoenix handle pre-existing data ...
    Amit SelaAmit Sela
    Nov 27, 2013 at 4:24 pm
    Nov 27, 2013 at 5:09 pm
  • Hi, Can hbase rpc timeout be changed across different HBase rpc calls for HBase 0.94. From the code, it looks like this is not possible ? I am wondering if there is a way to fix this ? Thanks Varun
    Varun SharmaVarun Sharma
    Nov 11, 2013 at 8:12 pm
    Nov 22, 2013 at 9:32 pm
  • Hi, I have HBase above Hadoop with one master node, one zookeeper node and four regionservers. When I turn up everything, on two nodes (or sometime the same node) are created the tables .META. and ...
    Nov 11, 2013 at 5:20 pm
    Nov 22, 2013 at 7:11 am
  • Hi, I am facing a kind of incompatibility issue between Hbase Client(from Solr) and Hbase server. While importing data from Hbase using DataImportHandler, client fails and errors out with "Unable to ...
    Nov 20, 2013 at 3:54 pm
    Nov 21, 2013 at 6:00 am
  • Hi, We are using HBase 0.94.10 version. We could able to take snapshots for all hbase tables and export into another cluster successfully. To take HBase table snapshots we followed procedure given at ...
    Oc tsdbOc tsdb
    Nov 19, 2013 at 10:03 am
    Nov 20, 2013 at 7:43 am
  • Hello, We are using HBase hbase-0.94.6+132 with cloudera distribution. We're trying to do a selective taImport with HBase filter, but can't get it work ...
    Nicolas PhungNicolas Phung
    Nov 18, 2013 at 2:58 pm
    Nov 18, 2013 at 4:36 pm
  • Hi Folks We are tuning a HBase cluster, it seems the current limitation is on network bandwidth usage during a performance test, the bidirectional bandwidth usage(sending+receiving) between our nodes ...
    Jia WangJia Wang
    Nov 14, 2013 at 8:57 am
    Nov 17, 2013 at 6:44 pm
  • Hi Guys: I've HBase running on a machine with multiple interfaces (for in-bound and inter-cluster traffic). I can't get HBase to listen on the interface I want it to by setting ...
    Sudarshan Kadambi (BLOOMBERG/ 731 LEXIN)Sudarshan Kadambi (BLOOMBERG/ 731 LEXIN)
    Nov 13, 2013 at 6:03 pm
    Nov 15, 2013 at 1:53 pm
  • I am running HBase 0.94.11 and zookeeper 3.4.5-1392090 in standalone mode. After a couple of hours, HBase exits because zookeeper session expired. Trying to change the session timeout from the ...
    Nov 7, 2013 at 6:16 pm
    Nov 11, 2013 at 5:32 pm
  • Dear all, I had to change the IP address of a hbase region server in the cluster. After effecting the IP change, all services in cluster came up fine, but for the region server on this node. Kindly ...
    Suresh V SSuresh V S
    Nov 11, 2013 at 6:25 am
    Nov 11, 2013 at 8:04 am
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98 users for November 2013

Ted Yu: 75 posts Jean-Marc Spaggiari: 38 posts Asaf Mesika: 36 posts Job Thomas: 15 posts Vladimir Rodionov: 15 posts Lars hofhansl: 14 posts Ramon Wang: 14 posts John: 11 posts Amit Sela: 9 posts Michael Stack: 9 posts Silvio Di gregorio: 9 posts Michael Grundvig: 8 posts Dhaval Shah: 8 posts Andrea Gandini: 7 posts David Koch: 7 posts Glumet: 7 posts Henry Hung: 7 posts Jingych: 7 posts Sandeep L: 7 posts Azuryy Yu: 6 posts
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