Grokbase Groups HBase user May 2016

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43 discussions - 187 posts

  • 1.Does Hbase uses ConcurrentskipListMap(CSLM) to store data in memstore? 2.When mwmstore is flushed to HDFS- does it dump the memstore Concurrentskiplist as Hfile2? Then How does it calculates blocks ...
    Shushant AroraShushant Arora
    May 1, 2016 at 10:36 am
    May 9, 2016 at 10:39 pm
  • I am working on Hbase ACLs in order to lock a particular cell value for writes by a user for an indefinite amount of time. This same user will be writing to Hbase during normal program execution, and ...
    Tokayer, Jason M.Tokayer, Jason M.
    May 3, 2016 at 12:52 pm
    May 6, 2016 at 6:57 am
  • Hi list, Last weekend I got a region server crashed, but some regions never got online again on other RSes. I've gone through the logs, and here is the timeline about some of the events: * 13:03:50 ...
    Shuai LinShuai Lin
    May 5, 2016 at 1:07 am
    Jun 4, 2016 at 10:55 am
  • Hi, We saw a very strange case in one of our production cluster. A couple regions cannot get their deleted rows or delete marker removed even after major compaction. However when the region triggered ...
    Tianying ChangTianying Chang
    May 27, 2016 at 9:32 pm
    Jun 3, 2016 at 5:06 am
  • Hi All, I have configured hbase authorization in my hbase cluster. Now i want to enable audit logs for hbase authorization to monitor users. For that i did following changes. 1.vim ...
    Mahesh SankaranMahesh Sankaran
    May 25, 2016 at 7:26 am
    May 27, 2016 at 12:43 pm
  • Hey everyone, We are noticing a file descriptor leak that is only affecting nodes in our cluster running 5.7.0, not those still running 5.3.8. I ran an lsof against an affected regionserver, and ...
    Bryan BeaudreaultBryan Beaudreault
    May 23, 2016 at 4:55 pm
    May 23, 2016 at 8:11 pm
  • On master web UI, i could see region (c371fb20c372b8edbf54735409ab5c4a) always in failed close state, So balancer could not run. i check the region on RS, and found logs about this region 2016-05-26 ...
    Heng ChenHeng Chen
    May 26, 2016 at 4:48 am
    May 31, 2016 at 2:06 am
  • Hi, I'm doing some development testing with Apache Trafodion running HBase Version 1.0.0-cdh5.4.5. All of a sudden, HBase has started to crash. First, it could not be recovered until I changed ...
    Gunnar TapperGunnar Tapper
    May 13, 2016 at 7:17 am
    May 17, 2016 at 7:53 pm
  • HI ALL: Recently,I met a strange problem, the first Region’s Memstore of one table (the only one) often blocked when flushing.(Both Version: hbase-0.98.6-cdh5.2.0 and, I updated 0.98 to ...
    May 31, 2016 at 2:03 am
    Jun 3, 2016 at 3:43 am
  • Hi, I would like some clarification on whether or not disabling autoflush affects Put and Delete operations or just Puts. The setAutoFlush doc states that it only affects Puts, but elsewhere in the ...
    Natasha d'silvaNatasha d'silva
    May 16, 2016 at 5:31 pm
    May 17, 2016 at 5:38 pm
  • Congratulations, Mikhail !
    Ted YuTed Yu
    May 26, 2016 at 6:47 pm
    May 27, 2016 at 4:34 pm
  • Hi All, I am new to Hbase database. I am planning to create rather mimic table in RDBMS which is temporal table which has below columns: Col1 Col2 From_Date To_Date Created Expired Primary Key is ...
    Subhash PophaleSubhash Pophale
    May 31, 2016 at 6:18 pm
    Jun 1, 2016 at 9:00 pm
  • Unscubscribe me too Thanks & Regards Rinku Garg C: +91 941.740.5922 <span class="m_body_email_addr" title="29f5318ea44dabb70f91cafc54f698fb"</span  Please consider the ...
    Garg, RinkuGarg, Rinku
    May 31, 2016 at 4:21 am
    May 31, 2016 at 6:54 pm
  • Hi Hbase uses MVCC for achieving consistent result for Get operations . To achieve MVCC it has to maintain multiple versions of same row/cells . How many max version of a row/cell does Hbase keeps at ...
    Shushant AroraShushant Arora
    May 16, 2016 at 11:55 pm
    May 17, 2016 at 12:38 am
  • I have very large log(50T per day), My log event as follows url,visitid,requesttime, 1, 1463387380, 1, 1463387280 ...
    May 16, 2016 at 8:47 am
    May 16, 2016 at 10:17 am
  • Hi, I used happyBase for base 0.9x, now we want to upgrade our HBase to 1.2. Any python client support 1.X ? Thanks.
    Zhun ShenZhun Shen
    May 8, 2016 at 3:45 pm
    May 12, 2016 at 7:22 am
  • I enabled Kerberos to secure hadoop and generated key tab for principal <span class="m_body_email_addr" title="55502f40dc8b7c769880b10874abc9d0"</span and provided test user RX (read ...
    May 10, 2016 at 4:49 am
    May 10, 2016 at 2:10 pm
  • Hi all, I'm having a couple of problems with exporting HBase snapshots to S3. I am running HBase version 1.2.0. I have a table called "domain" And I have created a snapshot for it: hbase(main):003:0 ...
    Lex ToumbourouLex Toumbourou
    May 5, 2016 at 3:53 am
    May 5, 2016 at 4:14 am
  • Hi all, I'm trying to run a large CopyTable job between clusters in totally different datacenters and I'm trying to determine what network connectivity is required here. As per the Cloudera blog post ...
    Lex ToumbourouLex Toumbourou
    May 29, 2016 at 4:24 am
    May 30, 2016 at 9:58 am
  • Hi, I am thinking to implement regular snapshots on HBase to protect against user mistakes, e.g. if something bad happens go back to the previous snapshot. I am thinking to keep something as one ...
    May 18, 2016 at 4:59 pm
    May 18, 2016 at 6:38 pm
  • Is your goal to protect web page access ? Take a look at HBASE-5291. If I didn't understand your use case, please elaborate. Use user@hbase in the future.
    Ted YuTed Yu
    May 17, 2016 at 2:04 pm
    May 17, 2016 at 4:06 pm
  • In Hfile v2 block level blommfilters are stored inb scanned section along with data block and leaf index. Load on open section contains bloomfilter data . Whats this bloom filter data? 1.Does it ...
    Shushant AroraShushant Arora
    May 15, 2016 at 12:05 pm
    May 16, 2016 at 4:52 am
  • Hello, I am fairly new to the HBase community and wanted to understand the difference between two different releases listed here: We have 1.1.4 and 1.2.1 with 1.1.4 ...
    Sumeet MaruSumeet Maru
    May 12, 2016 at 11:00 pm
    May 12, 2016 at 11:09 pm
  • HI, We're running a CDH 5.5.2 HBase cluster (HBase Version 1.0.0-cdh5.5.2, revision=Unknown). We are using the per-cell TTL feature (Mutation.setTTL) As I learn more about and read up on HBase, I ...
    Saad MuftiSaad Mufti
    May 6, 2016 at 1:43 pm
    May 7, 2016 at 6:04 am
  • 1.Why is it better to have single file per region than multiple files for read performance. Why can't multile threads read multiple file and give better performance? 2Does hbase regionserver has ...
    Shushant AroraShushant Arora
    May 6, 2016 at 1:36 am
    May 6, 2016 at 10:56 pm
  • Is there a way to implement a simple user/pass authentication in HBase instead of using a Kerberos? Are the coprocessor the right way of implementing such authentication?
    Mohit AnchliaMohit Anchlia
    May 6, 2016 at 5:51 pm
    May 6, 2016 at 6:07 pm
  • 1.Can I use Uniform split for non hex keys? 2.if yes, how to specify key range for split. 3.If no then whats the diff between HexSplit and Uniform Split. Thanks!
    Shushant AroraShushant Arora
    May 31, 2016 at 2:30 pm
    May 31, 2016 at 2:41 pm
  • Please use user@hbase for future correspondence. Here is related code from ZooKeeperWatcher (NPE seems to have come from the for loop): public List<String getMetaReplicaNodes() throws KeeperException ...
    Ted YuTed Yu
    May 28, 2016 at 3:58 pm
    May 31, 2016 at 1:48 am
  • We had a regionserver fall out of our cluster, I assume due to the process hitting a limit as the region servers .out log file just contained "Killed" which I've experienced when hitting open file ...
    Harry WayeHarry Waye
    May 27, 2016 at 4:39 pm
    May 29, 2016 at 11:59 pm
  • Hi Hbase uses zookeeper for various purposes. e.g for region split. Regionserver creates a znode in zookeeper with splitting state and master gets notification of this directory , since zookeeper is ...
    Shushant AroraShushant Arora
    May 15, 2016 at 2:43 am
    May 16, 2016 at 12:18 am
  • can a hbase table with single column family hve its row spawned on multiple blocks in a same HFile ? Suppose there is only one hfile in that case is it possile a column family having 5-6 columns is ...
    Shushant AroraShushant Arora
    May 15, 2016 at 5:46 am
    May 16, 2016 at 12:09 am
  • Hi, Guys Recently we are debating the usage for hbase as our destination for data pipeline job. Basically, we want to save our logs into hbase, and our pipeline can generate 2-4 terabytes data ...
    Yi JiangYi Jiang
    May 12, 2016 at 1:05 am
    May 12, 2016 at 4:01 am
  • Hi there, I have a use case here where I have a table that have low billions of rows and less than 50 columns. This is a very popular data sources where there is a huge demand internally people want ...
    Bin WangBin Wang
    May 11, 2016 at 9:21 pm
    May 11, 2016 at 11:11 pm
  • Dear team, While starting Hbase master from newly installed HDP 2.4 we are getting" Error: Could not find or load main class org.hadoop.hbase.master.HMaster". Please advice on this. Thanks in advance!
    Raghuveera RamamoorthiRaghuveera Ramamoorthi
    May 9, 2016 at 4:55 pm
    May 9, 2016 at 9:51 pm
  • Hi, I have HBase cluster running on HBase 1.0.0-cdh5.4.4 I do periodically get NotServingRegionException and I can't find the reason for such exception. It happens randomly on different tables ...
    Serega SheypakSerega Sheypak
    May 6, 2016 at 7:19 pm
    May 7, 2016 at 7:44 pm
  • Hi, Suppose I have an HBase table with many regions, and possibly many rows in the memstore from recent additions. Suppose I have a program that opens a Scan on the table, from start to finish. Full ...
    Dave BirdsallDave Birdsall
    May 4, 2016 at 10:21 pm
    May 4, 2016 at 10:23 pm
  • Hi, Looking in the archives, there's an old thread on this topic: ...
    Gunnar TapperGunnar Tapper
    May 31, 2016 at 7:05 pm
    May 31, 2016 at 7:05 pm
  • ________________________________
    Manisha SethiManisha Sethi
    May 31, 2016 at 4:19 am
    May 31, 2016 at 4:19 am
  • ​I am running through some issues related to Hbase REST API. Let me give you a little background first: I built an HBase table in my company's CDH cluster. The row key is "<some string |<some string ...
    Diwanshu ShekharDiwanshu Shekhar
    May 25, 2016 at 10:39 pm
    May 25, 2016 at 10:39 pm
  • This is great. Thanks James for organizing! Enis
    Enis SöztutarEnis Söztutar
    May 20, 2016 at 3:04 am
    May 20, 2016 at 3:04 am
  • Hi HBase mailling list, This is a non-technical question but please let me know if I should post it somewhere else. I really don't think any place other than the HBase mailling list will be a better ...
    Bin WangBin Wang
    May 16, 2016 at 11:07 pm
    May 16, 2016 at 11:07 pm
  • I just took a pass through the talks. This is the best set we've had at any of the hbasecons. You should all come. End of Message, Thanks all, St.Ack
    Michael StackMichael Stack
    May 11, 2016 at 9:17 pm
    May 11, 2016 at 9:17 pm
  • While running with set to true I ran into an OOM on a region server that subsequently died. Probably this was due to too little direct memory config. However, after ...
    Henning BlohmHenning Blohm
    May 10, 2016 at 4:22 pm
    May 10, 2016 at 4:22 pm
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56 users for May 2016

Michael Stack: 27 posts Ted Yu: 23 posts Shushant Arora: 15 posts Ramkrishna vasudevan: 9 posts Heng Chen: 7 posts Bryan Beaudreault: 6 posts Gunnar Tapper: 6 posts Mahesh Sankaran: 6 posts Shuai Lin: 6 posts Anoop John: 5 posts Lex Toumbourou: 5 posts Tokayer, Jason M.: 5 posts Ashish singhi: 4 posts Tianying Chang: 4 posts Benedict Whittamsmith: 3 posts Horaamit: 3 posts Natasha d'silva: 3 posts Bin Wang: 2 posts Dave Birdsall: 2 posts Enis Söztutar: 2 posts
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