Grokbase Groups HBase user July 2014

Search Discussions

128 discussions - 504 posts

  • Hi All, We upgraded from HBase0.94.15(cdh4.5) to HBase0.98.1(cdh5.1). We are able to CRUD if we create new tables. However, old tables are not showing up. I checked ZK, and i can see znodes of 0.94 ...
    Anil guptaAnil gupta
    Jul 28, 2014 at 8:56 pm
    Aug 27, 2014 at 12:16 pm
  • HBase file encryption some inconsistencies observed and data loss happens after running the hbck tool, the operation steps are as below. (one thing what I observed is, on startup of HMaster if it is ...
    Shankar hiremathShankar hiremath
    Jul 25, 2014 at 2:09 pm
    Jul 30, 2014 at 8:13 pm
  • Next time this happens, can you take jstack of the region server and pastebin it ? Thanks
    Ted YuTed Yu
    Jul 8, 2014 at 9:06 am
    Jul 22, 2014 at 8:06 am
  • Maybe you can try my action: Before I took the action, I almost see the RS connection ...
    Rural HunterRural Hunter
    Jul 13, 2014 at 3:39 am
    Jul 17, 2014 at 8:59 am
  • I’m running HBase 0.98. I’m trying to snapshot a table, but it’s timing out after 60 seconds. I increased the value of hbase.snapshot.master.timeoutMillis and restarted HBase, but the timeout still ...
    Brian JeltemaBrian Jeltema
    Jul 21, 2014 at 12:04 pm
    Jul 22, 2014 at 3:53 pm
  • Hi All, I tried to find apis for fuzzyRowFilter with range search but did not find any. Here is what I want to achieve: show the row key in a certain date range. Our row key design is like customer ...
    Jul 9, 2014 at 3:55 pm
    Jul 9, 2014 at 10:55 pm
  • Hi Guangle, Please have a look at the online book, there's a section on upgrades. Also, please consider upgrading to 0.98. The 0.96 line is in minimum maintenance mode and 0.98 is considered the ...
    Nick DimidukNick Dimiduk
    Jul 22, 2014 at 8:44 pm
    Jul 26, 2014 at 1:01 am
  • Hi All, HBase has sorted and indexed Hfile format, which enables fast lookup. I am wondering is there any other feature help Hbase achieve efficient random access? I want to know the whole story, but ...
    Yl wuYl wu
    Jul 4, 2014 at 7:23 am
    Jul 7, 2014 at 8:14 pm
  • Hi there, Is it possible to run multiple region servers at one machine/node? If this is possible, how to start multiple region servers with command lines or cloudera manager? Thanks, Jane --
    Jane TaoJane Tao
    Jul 16, 2014 at 10:07 pm
    Jul 24, 2014 at 11:13 pm
  • Hi All, Recently i have upgraded HBase environment from 0.94 to 0.98.3. Now trying to use snappy compression with it. I have installed snappy library as per guide mentioned in ...
    Hanish BansalHanish Bansal
    Jul 11, 2014 at 10:22 am
    Jul 23, 2014 at 10:33 am
  • I'm using completebulkload to load 500GB of data to a table (presplitted). However, it reports the following errors: Looks like completebulkload didn't recognize the namespace part ...
    Jianshi HuangJianshi Huang
    Jul 29, 2014 at 6:40 am
    Jul 31, 2014 at 2:32 am
  • Hi, I have the following row key and value (column family/column qualifier ignored): hash(sitename) + sessionid value: duration I need to calculate the duration in a distributed environment ...
    Mingtao ZhangMingtao Zhang
    Jul 25, 2014 at 5:50 pm
    Jul 26, 2014 at 10:56 am
  • Hi How do users usually go about sizing HBase clusters? What are the factors you take into account? What are typical hardware profiles you run with? Any data points you can share would help. Thanks ...
    Amandeep KhuranaAmandeep Khurana
    Jul 16, 2014 at 5:49 am
    Jul 19, 2014 at 4:53 pm
  • HBase version: hbase-0.98.2-hadoop1, stand-alone mode.‍ I extends FilterBase, then writes NOTHING in it, put the jar into lib, run a scan with it, nothing happens. It keeps going like forever Then I ...
    Jul 16, 2014 at 7:50 am
    Jul 17, 2014 at 6:40 pm
  • Hi All, I am using Mapreduce API to read Hbase Table, based on some scan operation in mapper and putting the data to a file in reducer. I am using Hbase Version "Version". *Problem:* Now in ...
    Jul 31, 2014 at 3:20 pm
    Aug 2, 2014 at 1:05 pm
  • I have a HBase cluster on AWS. I have written few REST services which are supposed to connect to this HBase cluster and get some data. My configuration is as below : 1. Java code, eclipse, tomcat ...
    Chandrashekhar KotekarChandrashekhar Kotekar
    Jul 30, 2014 at 11:34 am
    Aug 1, 2014 at 6:17 am
  • Dear All, Observation: I have HBase cluster with Kerberos enabled, when the Region Server startups then we observed some 20-30 socket fds are in CLOSE_WAIT state, After that when the Region Server ...
    Shankar hiremathShankar hiremath
    Jul 24, 2014 at 6:49 am
    Jul 24, 2014 at 7:32 pm
  • Hi I was running WALPlayer that output HFile for future bulkload. There are 6200 hlogs, and the total size is about 400G. The mapreduce job finished. But I saw two bad things: 1. More than half of RS ...
    Tianying ChangTianying Chang
    Jul 22, 2014 at 3:16 pm
    Jul 22, 2014 at 6:33 pm
  • Hi, I am trying to find a consistant hasing algorithm for the first portion of the row key. I saw the document/book that MD5 is mentioned everything. But I have trouble to persuade myself that MD5 ( ...
    Mingtao ZhangMingtao Zhang
    Jul 21, 2014 at 2:19 pm
    Jul 23, 2014 at 6:35 pm
  • 1.How to split region servers at table definition time? 2.Will hbase write onto only one region server when no splits are defined even if key is not monotonically increasing? 3. When does a region ...
    Shushant AroraShushant Arora
    Jul 15, 2014 at 1:10 pm
    Jul 16, 2014 at 9:30 am
  • I have a bulk load job running daily for months, when suddenly I got a FileNotFoundException. Googling it I found HBASE-4030 and I noticed someone reporting it started to re-appear at 0.94.8. I'm ...
    Amit SelaAmit Sela
    Jul 6, 2014 at 11:20 am
    Jul 8, 2014 at 8:32 am
  • Hi all, So this question might be stupid, retarded even, but it has been bugging me for a while and I cannot think of a better place to ask this. I am really impressed with the way HBase works (as a ...
    Arun AllamsettyArun Allamsetty
    Jul 7, 2014 at 10:55 pm
    Jul 8, 2014 at 8:20 am
  • Hi All, I've read many articles, including Bertozzi's Who needs a Master, but I am still confused about the Hmaster. If the Hmaster goes down, does the system need to take any failover ? Or just ...
    Yl wuYl wu
    Jul 3, 2014 at 7:40 am
    Jul 4, 2014 at 1:42 am
  • Hello all, I have setup a security hbase/hdfs/zookeeper, which was confirmed and work normally. I wrote a Java program to get/put data to a table and package the core-site.xml / hbase-site.xml (which ...
    Cheney SunCheney Sun
    Jul 1, 2014 at 3:45 pm
    Jul 2, 2014 at 6:09 am
  • Hi, I have a "conceptional" question and would appreciate hints. My task is to save files to hdfs and to maintain some informations about them in a hbase db and then serve both to the application ...
    Wilm SchumacherWilm Schumacher
    Jul 31, 2014 at 3:18 pm
    Jul 31, 2014 at 7:02 pm
  • Hi, I am working on Twitter API for retrieve the twitter information and store those details into Hbase table. Here, I am not able to put twitter4j.Place attributes into Hbase table, I am able to ...
    Jul 24, 2014 at 3:04 pm
    Jul 28, 2014 at 5:56 am
  • Hi, If I have a one-to-many relationship in a SQL database (an author might have written many books), and I want to denormalize it for writing in HBase, I'll have a table with the Author as the row ...
    Arun AllamsettyArun Allamsetty
    Jul 22, 2014 at 12:44 am
    Jul 23, 2014 at 2:57 am
  • Hi all, I removed regions in transition zookeeper path /hbase/unassigned. But I don't want to bring down master node (the whole cluster will be down). Is there a way to force the master node to load ...
    Libo YuLibo Yu
    Jul 21, 2014 at 11:21 pm
    Jul 22, 2014 at 7:50 pm
  • I have a Hadoop cluster made of 3 slaves and 1 master on top of which there is an HBase cluster with 3 RS and 1 master respectively. Additionally there is a Zookeeper ensemble on 3 machines. The ...
    Cosmin Cătălin SandaCosmin Cătălin Sanda
    Jul 9, 2014 at 1:19 pm
    Jul 9, 2014 at 3:18 pm
  • Without switching off the balancer, is there any way I can mark certain hbase region servers from getting the regions from the HBase master? Thanks, -- View this message in context ...
    Jul 26, 2014 at 3:44 am
    Jul 28, 2014 at 5:37 am
  • my hbase version is 0.96,and regionServer throw this exception,is this a bug? 2014-07-25 13:04:07,494 ERROR [regionserver60020-largeCompactions-1406165462536] regionserver.CompactSplitThread ...
    Jul 25, 2014 at 5:11 am
    Jul 25, 2014 at 6:00 am
  • Hi, I'm using HBase 0.98.3 with hadoop 2.4.0. We have application that calls HTable.put and in case of exception we have we create the table. The application is freezing in unexpected manner. YourKit ...
    Anand NalyaAnand Nalya
    Jul 23, 2014 at 1:08 pm
    Jul 24, 2014 at 12:51 am
  • Hi all, I move my cluster to another cluster with CopyTable, then I found too many timeout, Most of them are Delete! I found the table has too many storefiels, so i do a major_compact, then things be ...
    Li YongLi Yong
    Jul 23, 2014 at 8:22 am
    Jul 23, 2014 at 10:26 am
  • The 1st HBase 0.98.4 release candidate (RC0) is available for download at and Maven artifacts are also available in the temporary repository ...
    Andrew PurtellAndrew Purtell
    Jul 15, 2014 at 3:39 am
    Jul 22, 2014 at 3:31 pm
  • I want to use coprocessors (observers), Could I execute an coprocessors which executes my code when a row expired because the TTL has expired? will it be executed automatically? I mean,, without any ...
    Guillermo OrtizGuillermo Ortiz
    Jul 21, 2014 at 12:25 pm
    Jul 21, 2014 at 2:57 pm
  • why not introduce reverse index into hbase for multi-dimensional query ? looks like sorl + hbase
    Jul 16, 2014 at 2:43 am
    Jul 18, 2014 at 7:41 am
  • Hi all, after running a write intensive workload on HBase (0.98) I exhausted the HDFS space. I realized that most of the HDFS space was occupied by files in the path /apps/hbase/data/oldWALs/ ...
    Giuseppe ReinaGiuseppe Reina
    Jul 14, 2014 at 4:44 pm
    Jul 14, 2014 at 6:38 pm
  • If there are too many store files, flush will wait till compaction clears them [1] or hbase.hstore.blockingWaitTime is over! Do you see similar logs? [1] ...
    Bharath VissapragadaBharath Vissapragada
    Jul 14, 2014 at 5:51 am
    Jul 14, 2014 at 10:46 am
  • Hi I'm using hbase0.96. I create a table, then insert some data. Then I find the table have 17 regions, but all the regions are on one Region Server. Is it normal? I think if region splits, then the ...
    Jul 1, 2014 at 2:37 am
    Jul 1, 2014 at 4:29 am
  • Hi Reinis, sorry, may be missing some context here, you're saying - "Why is Watcher ignoring Disconnected from ZooKeeper?". Normally there's a quorum of zookeeper nodes in the cluster, and when ...
    Mikhail AntonovMikhail Antonov
    Jul 17, 2014 at 9:03 am
    Sep 10, 2014 at 7:21 am
  • Hi, We are writing a billion records into HBase using multiple clients. Each client is multithreaded. Autoflush is set to false and the write buffer size = 12MB. The WriteRequestCount metric is ...
    Jul 30, 2014 at 10:35 am
    Aug 4, 2014 at 10:07 pm
  • I need to generate from a 2TB dataset and exploded it to 4 Column Families. The result dataset is likely to be 20TB or more. I'm currently using Spark so I sorted the (rk, cf, cq) myself. It's huge ...
    Jianshi HuangJianshi Huang
    Jul 31, 2014 at 3:02 am
    Aug 1, 2014 at 4:52 pm
  • Does anyone know how to read data from OpenTSDB/HBase into PySpark? I’ve searched multiple forums and can’t seem to find the answer. Thanks!
    Jul 31, 2014 at 6:41 pm
    Jul 31, 2014 at 10:55 pm
  • Hi All, We recently upgrade our cluster from 0.94 to HBase0.98(cdh5.1). All the tables are working fine except one table with 0.94. One of the region has been stuck in transition since our upgrade. I ...
    Anil guptaAnil gupta
    Jul 30, 2014 at 12:52 am
    Jul 30, 2014 at 4:20 am
  • Hi, if the namenode (or zookeeper) is down for some reason, hbase-regionserver(on datanode) keep retrying to connect to zookeeper continuously for long time. We tried by setting ...
    Oc tsdbOc tsdb
    Jul 29, 2014 at 10:48 am
    Jul 29, 2014 at 5:05 pm
  • Deleting from hbase:meta is for advanced users :-) Can you tell us why that row needs to be deleted ? Cheers
    Ted YuTed Yu
    Jul 28, 2014 at 4:05 am
    Jul 28, 2014 at 10:17 am
  • Hi, I need the HBase-0.99-SNAPSHOT, more specifically the following two jars, because of an open-source project depends on them. org.apache.hbase:hbase-testing-util:jar:0.99.0-SNAPSHOT ...
    Yun pengYun peng
    Jul 24, 2014 at 10:08 pm
    Jul 25, 2014 at 10:39 pm
  • Hi All, Is it possible to pad the first byte while specifiy the following bytes for rowkey filter? xxxxxxxx19890208~xxxxxxxx19890209 will select from the following if availble: 0000000019890208 ...
    Mingtao ZhangMingtao Zhang
    Jul 23, 2014 at 6:40 pm
    Jul 24, 2014 at 3:10 am
  • Hello all! We have a trouble with hbase Our hadoop cluster has 4 nodes (plus 1 client node). There are CHD 4.6 + CM 4.7 hadoop installed Hadoop versions are: - hadoop-hdfs : 2.0.0+1475 - ...
    Павел МезенцевПавел Мезенцев
    Jul 22, 2014 at 11:00 am
    Jul 22, 2014 at 8:39 pm
  • Hi, I have 2 Hbase clusters setup in different data center. Both are configured in pseudo-distributed mode. I followed the steps in Hbase Replication ...
    Vimal JainVimal Jain
    Jul 22, 2014 at 5:51 am
    Jul 22, 2014 at 1:00 pm
Group Navigation
period‹ prev | Jul 2014 | next ›
Group Overview
groupuser @
categorieshbase, hadoop

120 users for July 2014

Ted Yu: 89 posts Esteban Gutierrez: 21 posts Michael Stack: 18 posts Rural Hunter: 15 posts Andrew Purtell: 12 posts Qiang Tian: 12 posts Arun Allamsetty: 11 posts Lars hofhansl: 11 posts Mingtao Zhang: 11 posts Anil gupta: 10 posts Hotec04: 8 posts Jean-Marc Spaggiari: 8 posts Jianshi Huang: 8 posts Mikhail Antonov: 7 posts Wellington Chevreuil: 7 posts 李玉明: 7 posts 神之疯神: 7 posts Andrew Purtell: 6 posts Brian Jeltema: 6 posts Ch huang: 6 posts
show more