Grokbase Groups HBase user May 2015
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79 discussions - 435 posts

  • A RegionServer was killed because OutOfMemory(OOM), although the process killed can be seen in the Linux message log, but i still have two following problems: 1. How to inspect the root reason to ...
    David chenDavid chen
    May 13, 2015 at 2:44 am
    May 21, 2015 at 8:05 am
  • Hi, I need some info on Hbase vs Cassandra as a data store (in general plus specific to time series data). The comparison in the following helps: 1: features 2: deployment and monitoring 3 ...
    AjayAjay
    May 29, 2015 at 7:12 pm
    Jun 7, 2015 at 4:27 am
  • Hi, we are using extremely cheap HW: 2 HHD 7200 4*2 core (Hyperthreading) 32GB RAM We met serious IO performance issues. We have more or less even distribution of read/write requests. The same for ...
    Serega SheypakSerega Sheypak
    May 18, 2015 at 11:26 pm
    May 25, 2015 at 8:21 am
  • HI, I am using HBase 0.98.7. I am using HBase snapshots to backup data. I create snapshot of tables each our. Each create snapshot process will cause the flush of the memstore, and creation of ...
    Akmal AbbasovAkmal Abbasov
    May 12, 2015 at 4:55 pm
    Jul 13, 2015 at 2:04 pm
  • In our system each server has 2 dns associated with it, one always points to a private address and the other to public or private depending on the context. This issue did not show up in 0.94.x, but ...
    Bryan BeaudreaultBryan Beaudreault
    May 22, 2015 at 5:19 pm
    May 23, 2015 at 5:47 am
  • Hi all, I use hbase0.96.0 with hadoop 2.2.0, and the custom said they can not write into hbase cluster, So i stop the HMaster and start it soon, But it seems that the HMaster not response to request, ...
    Louis HustLouis Hust
    May 16, 2015 at 3:22 am
    May 19, 2015 at 2:43 am
  • Hi, We have a cluster that used to be able to take snapshot. But recently, one table failed due to the error below. Other tables on the same clusters are fine. Any idea what could go wrong? Is the ...
    Tianying ChangTianying Chang
    May 19, 2015 at 6:12 am
    May 20, 2015 at 4:52 pm
  • Hi, I'm getting this error when trying to read from HFiles: http://pastebin.com/SJci7uQM Any idea what's going on here? Thanks!
    DonmaiDonmai
    May 12, 2015 at 1:02 pm
    May 27, 2015 at 9:34 pm
  • Hi, I have recently started running MR on hbase snapshots but when the MR is running there is pretty high CPU usage on datanodes and I start seeing IO wait message in datanode logs and as soon I kill ...
    Rahul malviyaRahul malviya
    May 13, 2015 at 4:37 pm
    May 13, 2015 at 8:06 pm
  • I have some basic questions on regions. 1) I have a 10 node HBase cluster. When I create a table in HBase, how many regions will be allocated by default? I looked at the HBase Master UI and it seems ...
    Arun PatelArun Patel
    May 11, 2015 at 10:38 pm
    May 12, 2015 at 3:33 pm
  • Hi, all, I am maintaining an hbase 0.96.0 cluster, but from the web ui of HBase regionserver, i saw Block locality is 0 for all regionserver. Datanode on l-hbase[26-31].data.cn8 and regionserver on ...
    娄帅娄帅
    May 12, 2015 at 3:00 pm
    Jun 8, 2015 at 12:49 pm
  • Hi, all My cluster is cdh5.2.0 with hbase 0.98.6, and recently some region server load is very high, about 50, and the CPU usage is about 2400%(with 24 core). I check the log in region server, and ...
    Louis HustLouis Hust
    May 19, 2015 at 11:56 am
    May 21, 2015 at 12:39 pm
  • Hi all, For testing on my laptop (OSX with JDK 1.7.0_45) I usually build the latest version from branch-1.0 and use the following config: <configuration <property <name hbase.rootdir</name <value ...
    TsunaTsuna
    May 18, 2015 at 3:56 am
    May 20, 2015 at 4:37 am
  • Hello all- I'm hoping someone can point me in the right direction as I've exhausted all my knowledge and abilities on the topic... I've inherited an old, poorly configured and brittle CDH4 cluster ...
    ApacheApache
    May 24, 2015 at 3:43 pm
    May 27, 2015 at 6:32 pm
  • .. by our Govind. See here: https://blogs.apache.org/hbase/entry/the_hbase_request_throttling_feature St.Ack
    Michael StackMichael Stack
    May 12, 2015 at 8:58 pm
    May 14, 2015 at 4:34 am
  • Are not Scan and Gets supposed to be almost as fast? I have a pretty small table with 65K lines, few columns (hundred?) trying to go a get and a scan. hbase(main):009:0 scan 'sensors', { COLUMNS = ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    May 20, 2015 at 2:34 am
    May 20, 2015 at 1:03 pm
  • Hello, I'm about to start tackling our upgrade path for 0.94 to 1.0+. We have 6 production hbase clusters, 2 hadoop clusters, and hundreds of APIs/daemons/crons/etc hitting all of these things. Many ...
    Bryan BeaudreaultBryan Beaudreault
    May 5, 2015 at 3:59 pm
    May 14, 2015 at 6:49 pm
  • Hello all, I've been out of the HBase world for a while, and I'm just now jumping back in. As of HBase .94, it was still common to take a hash of your RowKey and use that to "salt" the beginning of ...
    Jeremy pJeremy p
    May 1, 2015 at 4:09 pm
    May 13, 2015 at 8:31 pm
  • Hi, in 0.94 we could use autoFlush method for HTable. Now HTable shouldn't be used, we refactoring code for Table Here is a note: http://hbase.apache.org/book.html#perf.hbase.client.autoflush on your ...
    Serega SheypakSerega Sheypak
    May 13, 2015 at 1:26 pm
    May 13, 2015 at 3:20 pm
  • Hello, We have a table in HBase that has very large rows and it goes OOM when the table mapper attempts to read the entire row into a result. We would like to be able to map over each Cell in the ...
    Webb, Ryan L.Webb, Ryan L.
    May 11, 2015 at 3:48 pm
    May 11, 2015 at 10:52 pm
  • Hi, I want to run MR job on snapshot of large HBase table but I am getting timeout errors while doing so. Can you tell me what I am doing wrong ? I am using hbase-0.98.6-cdh5.2.0. hbase-site.xml ...
    Rahul MalviyaRahul Malviya
    May 8, 2015 at 6:21 pm
    May 8, 2015 at 8:32 pm
  • Hi, I using exportSnapshot tool, and observed a strange behaviour. I have HBase HA configured in my destination cluster. I have hbm1 and hbm2 which are HBase masters. Currently hbm2 is active, and ...
    Akmal AbbasovAkmal Abbasov
    May 3, 2015 at 2:54 pm
    May 5, 2015 at 1:54 am
  • Hi, I need to set tight timeout for get/scan operations and I think HBase Client already support it. I found three related keys: - hbase.client.operation.timeout - hbase.rpc.timeout - ...
    Jianshi HuangJianshi Huang
    May 18, 2015 at 6:11 am
    May 28, 2015 at 2:33 am
  • Hi I'm trying to emit, on reduce phase, a list of puts *context.write(null , puts);* puts is *List<Put puts=new ArrayList<Put ();* and the Reduce signature is: *public static class Reduce extends ...
    Silvio Di gregorioSilvio Di gregorio
    May 19, 2015 at 1:05 pm
    May 19, 2015 at 7:12 pm
  • Hi All, We are using hbase version 0.96.1.1-cdh5.0.0 and need to selectively delete some regions from a table. I can afford to disable the table for sometime in order to perform this activity but ...
    Gaurav AgarwalGaurav Agarwal
    May 10, 2015 at 7:59 pm
    May 11, 2015 at 3:23 pm
  • Hi, I kept running into this whenever I remove tables WARN catalog.MetaReader: No serialized HRegionInfo in ...
    Tom ChanTom Chan
    May 29, 2015 at 2:39 am
    Jun 3, 2015 at 2:21 am
  • Hi All, In our cluster region server logs are filled with response too slow message. This is causing jobs to slow down. How can I debug what is the reason for this slowness. We have enabled short ...
    Rahul malviyaRahul malviya
    May 29, 2015 at 3:38 pm
    May 29, 2015 at 5:20 pm
  • Hello, Currently we're running a MapReduce over live htables to do table merge (introduced at https://hbase.apache.org/0.94/book/mapreduce.example.html); At the samtime these tables are still serving ...
    ShaoFeng ShiShaoFeng Shi
    May 26, 2015 at 7:35 am
    May 29, 2015 at 8:30 am
  • Can I avoid hotspot of region with custom region split policy in hbase Key is of the form timestamp#guid. So can I have custom region split policy and use second part of key (i.e) guid as region ...
    Shushant AroraShushant Arora
    May 22, 2015 at 4:58 am
    May 22, 2015 at 9:43 am
  • Hi, My HBase cluster went through a rough patch recently where lot of region server started dying because of sudden increase in amount of data being funneled to the HBase cluster and we have to place ...
    Rahul malviyaRahul malviya
    May 9, 2015 at 10:05 pm
    May 10, 2015 at 4:36 pm
  • Hi, all, Our hbase is hbase-0.96.0, we found one region server not work normally, can any body know the reason? The time is about 2015-04-29 17:04:00 Attachment is the region server log. Any idea ...
    Mail listMail list
    May 4, 2015 at 5:40 am
    May 5, 2015 at 3:57 am
  • Hi, I am inserting data from my java application into two HBase tables back to back. And I am running my application sequentially as part of stress testing. I am getting strange error ...
    Jithender BoreddyJithender Boreddy
    May 21, 2015 at 8:58 am
    May 25, 2015 at 11:40 am
  • Hi, I have developed a baseRegionObserver coprocessor overriding preGetop, preScan which will be returning a top elements of each cell. Now I want to enable this coprocessor only for myself or some ...
    Navdeep AgrawalNavdeep Agrawal
    May 21, 2015 at 3:43 pm
    May 22, 2015 at 11:20 am
  • Hi, I am kind of new to HBase. Currently our production run IBM BigInsight V3, comes with Hadoop 2.2 and HBase 0.96.0. We are mostly using HDFS and Hive/Pig for our BigData project, it works very ...
    Java8964Java8964
    May 8, 2015 at 1:18 am
    May 14, 2015 at 2:17 pm
  • Hi All, I have been MapReduce on HBase for a while now and this has been really successful for me. But I have some MRs jobs in my pipeline which scan every row on hbase. So I was wondering I move ...
    Rahul MalviyaRahul Malviya
    May 8, 2015 at 3:18 pm
    May 8, 2015 at 6:39 pm
  • Hello, I am trying to test hbase 0.94.18 against hadoop 2.2.0. I changed hadoop.version in haddop-2.0 profile to 2.2.0. And on running tests i get following failure. Results : Tests in error ...
    Kuldeep BoraKuldeep Bora
    May 7, 2015 at 1:23 pm
    May 8, 2015 at 5:44 pm
  • Hi, HBASE-11658 <https://issues.apache.org/jira/browse/HBASE-11658 adds a non interactive mode to HBase shell and return modes depending on the success or failure. But, I am using HBase ...
    Akmal AbbasovAkmal Abbasov
    May 5, 2015 at 11:18 am
    May 5, 2015 at 4:57 pm
  • I have below issue on Hbase & Thrift: Is node configured so that Java applications can access HBase tables? Is Thrift installed on Access Node ? If Thrift is installed, where will I find the files ...
    AnkushAnkush
    May 4, 2015 at 7:35 pm
    May 4, 2015 at 10:17 pm
  • Hello, We have a scenario which need merge multiple Hbase tables into one table periodically; To gain better performance and minimal the impact to HBase server, we are evaluating the method of using ...
    Shi, ShaofengShi, Shaofeng
    May 22, 2015 at 9:35 am
    May 31, 2015 at 11:51 pm
  • Hi, What's the best (recommended) way to benchmark IO from one HBase cluster? What we are trying to achieve is to get some numbers in IO between 'old' and 'new' clusters, and this would be useful ...
    Dejan MengesDejan Menges
    May 26, 2015 at 3:22 pm
    May 26, 2015 at 4:21 pm
  • hi everyone: I encount a HBase issue: HBase can not put data after deleteall operation My HBase version: CDH5.3.0 My operation steps: 1.create a table 2.put value on a rowKey('abc')) 3.scan the ...
    XufengXufeng
    May 21, 2015 at 2:49 am
    May 26, 2015 at 8:55 am
  • Hi, http://hbase.apache.org/apidocs/ shows the latest version, but where I find the document for a specific version such as 0.98.5? Thanks,
    Guxiaobo1982Guxiaobo1982
    May 18, 2015 at 8:33 am
    May 18, 2015 at 6:36 pm
  • I'm attempting to write a Crunch pipeline to read various rows from a table in HBase and then do processing on these results. I am doing this from a cluster deployed using CDH 5.3.2 running Kerberos ...
    Edward C. SkoviakEdward C. Skoviak
    May 13, 2015 at 6:47 pm
    May 14, 2015 at 3:53 pm
  • Hi, I am creating a table using hive and getting this error. [127.0.0.1:10000] hive CREATE TABLE hbase_table_1(key int, value string) [Hive Error]: Query returned non-zero code: 1, cause: FAILED ...
    Ibrar AhmedIbrar Ahmed
    May 13, 2015 at 7:37 pm
    May 13, 2015 at 8:21 pm
  • Hi HBase community, I'm seeing a problem with hbase snapshot with 0.94.7 (CDH 4.2.0) When I manually run "snapshot <table name , <snapshot name " to take a snapshot, I keep getting error about ...
    Neutron sharcNeutron sharc
    May 15, 2015 at 10:49 pm
    Jun 17, 2015 at 5:49 pm
  • Hi all, The default size of Hbase.hregion.memstore.flush.size is define as 128 MB . Could anyone kindly explain what would be the impact if we increase this to a higher value 512 MB or 800 MB or ...
    Gautam BorahGautam Borah
    May 27, 2015 at 8:58 pm
    May 28, 2015 at 1:01 am
  • Hi, I am trying to use co processor to do some aggregations(eg topn) over all versions of a cell and return it . I found most of the aggregation implementation with coprocessors are done on column ...
    Navdeep AgrawalNavdeep Agrawal
    May 14, 2015 at 3:29 pm
    May 17, 2015 at 2:37 pm
  • Hi, I have observered major compaction on our hbase cluster it seems it compacts only one region at a time per region server. So I wanted to know if there is parameter to set to make it multi ...
    Rahul malviyaRahul malviya
    May 15, 2015 at 4:11 pm
    May 15, 2015 at 4:50 pm
  • We are trying to benchmark/test Phoenix with large tables.A 'select * from table1 limit 100000' hangs on a 1.4 billion row table (in sqlline.py or SQuirreL)The same select of 1million rows works on ...
    Kiru PakkirisamyKiru Pakkirisamy
    May 12, 2015 at 12:50 am
    May 12, 2015 at 11:34 am
  • Hi all, I’ve added the following configurations to my hbase-site.xml file. <property <name hbase.regionserver.optionalcacheflushinterval</name <value 86400000</value </property <property <name ...
    Akmal AbbasovAkmal Abbasov
    May 7, 2015 at 9:54 pm
    May 8, 2015 at 11:41 pm
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96 users for May 2015

Ted Yu: 70 posts Rahul Malviya: 22 posts Louis Hust: 21 posts Michael Segel: 17 posts Serega Sheypak: 17 posts Esteban Gutierrez: 16 posts Akmal Abbasov: 13 posts Bryan Beaudreault: 13 posts Nick Dimiduk: 12 posts David chen: 11 posts Michael Stack: 11 posts Jean-Marc Spaggiari: 9 posts Lars hofhansl: 8 posts Sean Busbey: 8 posts Talat Uyarer: 8 posts Tianying Chang: 8 posts Dejan Menges: 7 posts Andrew Purtell: 6 posts Donmai: 6 posts Shahab Yunus: 6 posts
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