Grokbase Groups HBase user May 2011

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139 discussions - 828 posts

  • I have switched to using the mslab enabled java setting to try to avoid GC causing nodes to go awol but it almost appears to be worse. Below is the latest problem with the JVM apparently actually ...
    May 23, 2011 at 11:52 am
    Jun 6, 2011 at 11:19 pm
  • Hi, I need to join two HBase tables. The obvious way is to use a M/R job for that. The problem is that the few references to that question I found recommend pulling one table to the mapper and then ...
    Eran KutnerEran Kutner
    May 31, 2011 at 12:07 pm
    Jun 17, 2011 at 12:03 am
  • Anyone ever see one of these? org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException: Failed 25 actions: WrongRegionException: 25 times, servers with issues: ...
    Robert GonzalezRobert Gonzalez
    May 13, 2011 at 7:08 pm
    Jun 23, 2011 at 5:07 pm
  • Greetings all -- We had some issues with huge GC counts that drive CPU to 100% and rendering RS basically dead, here is some data: We are normal here, about 1 ParNew per second. 67 2011-05-14T15:35 ...
    Jack LevinJack Levin
    May 15, 2011 at 2:13 am
    Jun 1, 2011 at 6:06 pm
  • Hi All, I have an HBase cluster on ec2 m1.large instance (10 region servers). I'm trying to run a read-only YCSB workload. It seems that I can't get a good throughput. It saturates to around 600+ ...
    Harold LimHarold Lim
    May 30, 2011 at 4:44 pm
    Jun 3, 2011 at 6:10 am
  • Hello, we have a situation when when RS/DN crashes hard, master is very slow to recover, we notice that it waits on these log lines: 2011-05-19 11:20:57,766 INFO org.apache.hadoop.ipc.Client: ...
    Jack LevinJack Levin
    May 19, 2011 at 6:46 pm
    May 31, 2011 at 3:42 am
  • Hi, I'm testing failing over from one master to another by stopping master1(master2 is always running). Master2 web i/f kicks in and I can zk_dump but the region servers never show up. Logs on ...
    Sean bardenSean barden
    May 5, 2011 at 4:23 pm
    May 16, 2011 at 7:45 pm
  • Hello, I have written with a few other people a paper for the ACM Symposium On Cloud Computing. This paper describes the methodology, infrastructure and configuration used as well as the results ...
    Thibault DoryThibault Dory
    May 13, 2011 at 11:07 am
    May 14, 2011 at 8:13 pm
  • Hi All, In my company currently we are working hard on deployment our cluster with HBase. We talking of ~20 nodes to hold pretty big data (~1TB per day). As there is a lot of data, we need a ...
    Ophir CohenOphir Cohen
    May 9, 2011 at 10:00 am
    May 12, 2011 at 8:20 pm
  • My setup seems to have a lot of regions with no data that just keep accumulating over time. Here are some details: I have time-series data (created by opentsdb) being inserted into hbase every ...
    Arvind JayaprakashArvind Jayaprakash
    May 31, 2011 at 6:21 am
    Jun 13, 2011 at 6:37 pm
  • In our test cluster. There is a lot of logs for socket timeout. I try to dig it, but nothing. Who have a clue? Thanks. Hbase version : 0.90.2 Logs: 2011-05-04 05:13:05,856 WARN ...
    May 5, 2011 at 12:41 pm
    May 13, 2011 at 9:00 am
  • Hi, We are in the process of moving a small Hbase/Hadoop cluster from our development to production environment.Our development environment were few intel desktops (8 cores CPU/8 Gigs RAM/7200 rpm ...
    Himanish KusharyHimanish Kushary
    May 16, 2011 at 5:33 pm
    May 20, 2011 at 3:48 pm
  • My observation is that storefileIndexSize is large. Is there a way to reduce it ? Region server metric: requests=11447, regions=10394, stores=10394, storefiles=3103, storefileIndexSize=3717, ...
    May 24, 2011 at 12:30 pm
    May 26, 2011 at 12:03 am
  • just put new hbase version on our test cluster. and been testing it... so far if I shutdown an RS, master does not reassign its regions, and we remain inconsistent forerver, likewise when new RS is ...
    Jack LevinJack Levin
    May 24, 2011 at 10:34 pm
    May 25, 2011 at 3:55 am
  • (Running Hbase 0.90.0 on 700+ nodes.) You may have seen many (or mostly all) of the following issues already: 1. HConnection.isTableAvailable: This doesn't seem to be working all the time. In ...
    Vidhyashankar VenkataramanVidhyashankar Venkataraman
    May 17, 2011 at 11:26 pm
    May 18, 2011 at 6:21 pm
  • Hello, I found something strange, here is the test case: 1) Process A insert data into a particular hbase region, WAL off, AutoFlush off 2) Process A issues htable.flushCommits(), no exception ...
    Qing YanQing Yan
    May 27, 2011 at 2:43 am
    Jun 1, 2011 at 5:40 pm
  • Hi, Is there any trigger-like facility in HBase. I would like to get notified about any data update/insert into a HBase table and fire up a map-reduce based on that update/insert event on the newly ...
    Himanish KusharyHimanish Kushary
    May 24, 2011 at 6:28 pm
    May 26, 2011 at 6:32 pm
  • Hi, I am currently looking at adding a transactional consistency aspect to HBase and had 2 questions: 1. My understanding is that when the client performs an operation (put, delete, incr), it is sent ...
    Eric Burin des RoziersEric Burin des Roziers
    May 5, 2011 at 1:04 pm
    May 6, 2011 at 7:07 pm
  • I took a jstack ( After few hours, its literally staggers to a halt and gets very very slow... Any ideas whats its blocking on? (main issue is that fsreads for RS get ...
    Jack LevinJack Levin
    May 2, 2011 at 12:47 am
    May 3, 2011 at 8:04 am
  • If Region server checkin after call this.serverManager.waitForRegionServers(). It seems that regionServerReport shouldn't add Region server to onlineServers. Otherwise The region may be opened again. ...
    May 25, 2011 at 4:28 am
    May 27, 2011 at 3:20 am
  • Hello everybody I've run into this strange problem. We run a 6 RS cluster and suddenly the client application started reporting errors, region not online. In the web console all regionserver appeared ...
    Daniel IancuDaniel Iancu
    May 23, 2011 at 4:26 pm
    May 25, 2011 at 7:28 pm
  • Hi, I am looking for a web based query tool that is able to query Hbase tables and columns. Can someone point me to any? I want to be able to create secondary indexes on Hbase tables then issue ...
    Sterk, Paul (Contractor)Sterk, Paul (Contractor)
    May 13, 2011 at 3:52 pm
    May 13, 2011 at 5:38 pm
  • Hi, I would like to know if there's a way to quickly count number of rows from scan result? Right now I'm iterating over ResultScanner like this: int count = 0; for (Result rr =; rr != ...
    Wojciech LangiewiczWojciech Langiewicz
    May 1, 2011 at 1:44 pm
    May 2, 2011 at 2:44 am
  • In order to reduce the total number of regions we have up'd the max region size to 5g. This has kept us below 100 regions per node but the side affect is pauses occurring every 1-2 min under heavy ...
    May 23, 2011 at 1:41 pm
    Jun 14, 2011 at 9:26 pm
  • Hi all, As I know, WAL is used to ensure the data is safe even if certain RS or the whole HBase cluster is down. But, it is anyway a burden on each put. I am wondering: is there any way to disable ...
    Weihua JIANGWeihua JIANG
    May 26, 2011 at 7:39 am
    May 31, 2011 at 2:08 am
  • I am looking for some advice on any changes to minimize these errors. Running Hbase standalone on version cdh3u0 and set Zoo.cfg to be 300 max client connections. I use only the java api and use new ...
    Barney FrankBarney Frank
    May 16, 2011 at 1:15 am
    May 16, 2011 at 4:18 pm
  • I m new to hbase.. here there is some errors as follows: while creatin hbase table and trying to display.. hbase(main):010:0 create 'test' 11/05/01 12:40:47 DEBUG zookeeper.ZooKeeperWrapper: Read ...
    Priya APriya A
    May 1, 2011 at 7:41 am
    Feb 20, 2012 at 5:05 am
  • I am trying for 0.90.1 (hbase-0.90.1-CDH3B4) under pseudo-dist mode, and met the problem of HMaster crashing. Here is how I did. I. First I installed Hadoop pseudo cluster (hadoop-0.20.2-CDH3B4) with ...
    Sean BigdatafunSean Bigdatafun
    May 29, 2011 at 6:28 am
    Jun 2, 2011 at 5:50 am
  • Hi, Could anybody please point to some article or paper which can give an understanding of the transaction per second (both read and write) that is supported or seen to be accomplished using HBase ...
    Himanish KusharyHimanish Kushary
    May 24, 2011 at 6:33 pm
    May 25, 2011 at 4:13 am
  • Hi there, Just experimenting with getting Hbase 0.90.3 working with Node.js using Thrift 0.6 (nonblocking & framed transport) and node-thrift. I was testing exceptions, by mutating on a column that ...
    Mark JareckiMark Jarecki
    May 21, 2011 at 3:52 am
    May 22, 2011 at 5:44 am
  • Hey Guys, Not sure if this functionality is available or not, if its not consider this a feature request :). The main summary is that rows can contain massive amounts of data, so we can narrow ...
    Matthew WardMatthew Ward
    May 12, 2011 at 8:49 pm
    May 16, 2011 at 7:36 pm
  • We were wondering if its advisable to provision hbase/hadoop nodes as VMWare instances? any suggestions? thanks, Vishal
    Vishal KapoorVishal Kapoor
    May 9, 2011 at 7:24 pm
    May 14, 2011 at 2:05 am
  • Dear all, We were using HBase 0.20.6 in our environment, and it is pretty stable in the last couple of month, but we met some reliability issue from last week. Our situation is very like the ...
    Stanley XuStanley Xu
    May 7, 2011 at 9:11 am
    May 12, 2011 at 8:24 pm
  • Hi, I am trying to set up hbase is pseudo distributed mode on one of the machines and I am getting this error when I try to use hbase shell. If I try the list command, it just hangs. ...
    Hari SreekumarHari Sreekumar
    May 30, 2011 at 4:20 pm
    Jun 28, 2012 at 11:45 am
  • Hi All, I started using HBase for a while and i am working on some open source project which has some old jars from Hadoop and HBase. Now I am trying to update it to the latest Hadoop and HBase ...
    Praveen BathalaPraveen Bathala
    May 12, 2011 at 3:29 pm
    Jun 11, 2011 at 3:38 pm
  • Hi, I have enabled debug for my Map-Reduce package inside the under the $HADOOP_HOME/conf directory (using CDH3). The logging ...
    Himanish KusharyHimanish Kushary
    May 24, 2011 at 2:17 pm
    May 26, 2011 at 6:40 pm
  • I am collecting hbase stats from jmx. Here's an example of the compaction stats from one of the region servers... compactionQueueSize 0 compactionSizeAvgTime 19349729 compactionSizeMaxTime 566512933 ...
    Tim SellTim Sell
    May 23, 2011 at 5:40 pm
    May 25, 2011 at 2:56 am
  • Hi, Our hbase/hadoop servers machines were shutdown without bringing the hadoop and hbase services down properly.Now when we try to bring up hbase we get the following error in the master log: ...
    Himanish KusharyHimanish Kushary
    May 23, 2011 at 2:51 pm
    May 24, 2011 at 5:10 pm
  • Hi - How can I pass the zookeeper connectString to the completebulkoad utility so that it will not try to use the default "localhost". -geof
    Geoff HendreyGeoff Hendrey
    May 25, 2011 at 4:41 am
    May 31, 2011 at 3:13 am
  • Hi all, I want to do a scan on a number of rows, each row having multiple columns, and I want to filter out some of this columns based on their values per example, if I have the following rows: ...
    Stefan ComanitaStefan Comanita
    May 10, 2011 at 12:57 pm
    May 23, 2011 at 7:16 am
  • To All, I'm running into IO issues when trying to write to an Hbase table using multiple STORE commands in PIG script. I can comment out any 2 of the STORE statements and run the script and then the ...
    Keric DonnellyKeric Donnelly
    May 19, 2011 at 7:29 pm
    May 22, 2011 at 4:16 am
  • I had spoken a while back about this problem (clients timing out when scanners do not return with a row yet: search for "A possible bug in the scanner. " I am trying to fix the problem in the next ...
    Vidhyashankar VenkataramanVidhyashankar Venkataraman
    May 19, 2011 at 10:38 pm
    May 19, 2011 at 11:15 pm
  • Hi , We running production environment cluster (10 machines) : 1) hbase version 0.90.2 2) 2 tablse 3) we create ~ 15 regions per day (region size 250Mb) I want to ask about major compaction best ...
    Oleg RuchovetsOleg Ruchovets
    May 16, 2011 at 10:43 am
    May 19, 2011 at 7:25 pm
  • This happened twice in two days: clients can't access one of the regions and consistently fails with NotServingRegionException "org.apache.hadoop.hbase.NotServingRegionException: Region is not ...
    Raghu AngadiRaghu Angadi
    May 13, 2011 at 7:07 am
    May 14, 2011 at 4:28 am
  • Afternoon everyone, I am researching what the best practice is for using HBase in user facing applications. I do not know all of the applications that will be ported to use HBase, but they do share ...
    Matt DaviesMatt Davies
    May 5, 2011 at 9:27 pm
    May 6, 2011 at 5:32 am
  • Hi everyone, I've just installing hadoop and hbase from cloudera (3) but when I try to go to http://localhost:60010 it just sits there continually loading. I can get to the regionserver fine - ...
    Nightie WolfiNightie Wolfi
    May 16, 2011 at 4:59 pm
    Aug 16, 2011 at 4:04 am
  • Hi, I am trying to run Haddop (hadoop- with Hbase (hbase-0.20.6) on a single node cluster in localhost. Hadoop start is ok without any errors but when i start Hbase : Master is running but ...
    Florent G.Florent G.
    May 19, 2011 at 4:18 pm
    Jul 7, 2011 at 4:23 am
  • Hi , Is it possible to define TTL for hbase row (I found TTL only for column family) ? In case it is not possible what is the best practice to implement TTL for hbase rows? Thanks in advance Oleg.
    Oleg RuchovetsOleg Ruchovets
    May 25, 2011 at 12:58 pm
    May 26, 2011 at 5:22 pm
  • I am simply using HBase API, not doing any Map-reduce work on it. Following is the code I have written , simply creating the file on HBase: import; import ...
    Praveenesh kumarPraveenesh kumar
    May 24, 2011 at 10:01 am
    May 24, 2011 at 3:15 pm
  • Hi Using hbase-0.20.6 mapreduce job started failing in the map phase (using hbase table as input for mapper)..(ran fine for a week or so starting with empty tables).. task tracker log: Task ...
    May 13, 2011 at 2:21 am
    May 18, 2011 at 1:49 am
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136 users for May 2011

Stack: 117 posts Jean-Daniel Cryans: 78 posts Ted Yu: 39 posts Jack Levin: 36 posts Gaojinchao: 34 posts Himanish Kushary: 22 posts Ted Dunning: 21 posts Wayne: 20 posts Michel Segel: 17 posts Doug Meil: 15 posts Stanley Xu: 15 posts Bijieshan: 13 posts Robert Gonzalez: 13 posts Todd Lipcon: 13 posts Ophir Cohen: 12 posts Andrew Purtell: 11 posts Harold Lim: 10 posts Vidhyashankar Venkataraman: 10 posts Bill Graham: 9 posts Matt Corgan: 9 posts
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