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  • Hi, I'm using HBase 0.94-23 with Hadoop 2.7.2. In my hadoop namenode log file, I'm getting below log info message over and over again. No jobs are running still seeing the same log appearing. When I ...
    Chathuri WimalasenaChathuri Wimalasena
    Jun 18, 2016 at 3:30 pm
    Jun 18, 2016 at 5:14 pm
  • Hello, We are running 1.2.0-cdh5.7.0 on our server side, and 1.0.0-cdh5.4.5 on the client side. We're in the process of upgrading the client, but aren't there yet. I'm trying to figure out the ...
    Bryan BeaudreaultBryan Beaudreault
    Jun 17, 2016 at 11:15 pm
    Jun 18, 2016 at 3:00 pm
  • Wondering if anyone knows the cause of messages like : "MemstoreFlusherChore requesting flush of <TABLE ,,1465289533949.94286e3c616b8b4635c9f0665e424a05. because <COLUMN_FAMILY has an old edit so ...
    TedTed
    Jun 17, 2016 at 6:50 pm
    Jun 17, 2016 at 9:30 pm
  • I am trying out HBase bulk loading. The command looks like this: $HADOOP_CLASSPATH=`${HBASE_HOME}/bin/hbase classpath` ${HADOOP_HOME}/bin/hadoop jar ${HBASE_HOME}/hbase-server-1.2.1.jar importtsv ...
    Mahesha999Mahesha999
    Jun 17, 2016 at 10:41 am
    Jun 17, 2016 at 11:03 am
  • I have a table with hundred of million records. This table contains data about servers and events genereated on them. Following is the row key of the table: rowkey = md5(serverId) + timestamp [32 hex ...
    Ravi SingalRavi Singal
    Jun 17, 2016 at 9:32 am
    Jun 17, 2016 at 9:32 am
  • in hbase 0.98.10, if we use LruBlockCache, and set regionServer's max heap to 10G in default: the size of in_memory priority of LruBlockCache is : 10G * 0.4 * 0.25 = 1G 0.4: hfile.block.cache.size ...
    WangYQWangYQ
    Jun 16, 2016 at 8:21 am
    Jun 17, 2016 at 12:57 am
  • HBASE_HEAP_SIZE=10G, use LruBlockCache with 0.4 of HBASE_HEAP_SIZE after hbase run 15 days , in find in some RS, there are 200M free block cache, but hit ration is 10%, too low i think the hit ration ...
    WangYQWangYQ
    Jun 16, 2016 at 5:41 am
    Jun 16, 2016 at 5:41 am
  • Since you already have hadoop 2.7.1, why is alluxio 1.1.0 needed ? Can you illustrate your use case ? Thanks
    Ted YuTed Yu
    Jun 16, 2016 at 2:32 am
    Jun 16, 2016 at 3:31 am
  • Good book on interview preparation for big data https://notionpress.com/read/big-data-interview-faqs
    Chaturvedi CholaChaturvedi Chola
    Jun 15, 2016 at 11:41 am
    Jun 15, 2016 at 12:53 pm
  • Hi, As per the official documentation of HBase it is mentioned that HBase typical schema should contain 1 to 3 column families per table ...
    Siddharth UbaleSiddharth Ubale
    Jun 15, 2016 at 11:11 am
    Jun 16, 2016 at 5:00 pm
  • Hi, Does the Heartbeat protocol in HBase 1.1 work for calls to the aggregation coprocessor? Or put another way, if I do a rowCount on a very large table, should I expect to encounter timeouts? ...
    Dave BirdsallDave Birdsall
    Jun 14, 2016 at 6:56 pm
    Jun 14, 2016 at 6:56 pm
  • Currently, we found sometimes our RS handlers were occupied by some big request. For example, when handlers read one same big block from hdfs simultaneously, all handlers will wait, except one ...
    Heng ChenHeng Chen
    Jun 14, 2016 at 3:35 am
    Jun 15, 2016 at 2:53 am
  • in hbase 0.98.10 class CacheConfig in line 417, we get lruCacheSize from heap conf and cachePercentage in line 450, when we use combineWithLru, we get a new lruCacheSize again from bucketCacheSize ...
    WangYQWangYQ
    Jun 13, 2016 at 7:33 am
    Jun 13, 2016 at 2:08 pm
  • Hi, I have configured secure HBase-1.1.3. Hadoop version using 2.7.2. I have enabled authorization in HBase. When executing any authorization command like user_permission, grant, revoke, etc. Its ...
    Kumar rKumar r
    Jun 13, 2016 at 5:19 am
    Jun 18, 2016 at 1:13 pm
  • hi,stack: Do you have any ideas?We confused for a long time. ------------------ 原始邮件 ------------------ 发件人: "wgq.wu";<<span class="m_body_email_addr" title="2aa161d746a9287006aae7e0780074a8" ...
    聪聪聪聪
    Jun 12, 2016 at 5:57 am
    Jun 12, 2016 at 5:57 am
  • in hbase 0.98.10 doc, section 6.2 "on the number of column families" " we currently does not do well with anything above two or three column families" i am wondering are there any new improvements on ...
    WangYQWangYQ
    Jun 12, 2016 at 3:30 am
    Jun 12, 2016 at 2:51 pm
  • Hi there, I started the built-in REST API server for HBase and I am planning to retrieve the complete column family for a given row using the URL format here ...
    Bin WangBin Wang
    Jun 11, 2016 at 6:22 pm
    Jun 12, 2016 at 4:58 am
  • Which version of hbase / Hadoop are you using ? (So that line number matching can be more accurate) It would be good if you can show your code snippet. Thanks
    Ted YuTed Yu
    Jun 11, 2016 at 11:40 am
    Jun 15, 2016 at 6:05 pm
  • Our regionservers are periodically seg faulting, roughly once a day, and I would appreciate some help debugging. Some version details: Java HotSpot(TM) 64-Bit Server VM (24.80-b11) for linux-amd64 ...
    Harry WayeHarry Waye
    Jun 10, 2016 at 4:36 pm
    Jun 15, 2016 at 6:46 pm
  • Hi All, I have problems when combining PageFilter with other filters. I am combining SingleColumnValueFilter, KeyOnlyFilter, and PageFilter. Scan returns different total number of row when pageFilter ...
    Eko SusiloEko Susilo
    Jun 9, 2016 at 10:41 am
    Jun 10, 2016 at 4:55 am
  • Hi, Is there any command to get complete description about hbase table such as owner, database, modified time, etc. In hive, i can get those information using desc formatted tablename; But in hbase ...
    Kumar rKumar r
    Jun 8, 2016 at 7:10 am
    Jun 8, 2016 at 8:34 am
  • Hi: I'm currently using HBase 1.1.2 and am in the process of determining how best to proceed with the column layout for an upcoming expansion of our data pipeline. Background: Table A: billions of ...
    Ken HampsonKen Hampson
    Jun 8, 2016 at 2:53 am
    Jun 13, 2016 at 2:34 am
  • Hi, I was wondering if it's possible/how to write Visibility Labels to an HFileOutputFormat2? I believe Visibility Labels are just implemented as Tags, but with the normal way of writing them with ...
    Ellis, Tom (Financial Markets IT)Ellis, Tom (Financial Markets IT)
    Jun 7, 2016 at 10:06 am
    Jun 17, 2016 at 6:37 am
  • Hello, We're running hbase 1.2.0-cdh5.7.0. According to the HBase book, in order to enable stripe compactions on a table we need to first disable the table. We basically can't disable tables in ...
    Bryan BeaudreaultBryan Beaudreault
    Jun 6, 2016 at 7:19 pm
    Jun 7, 2016 at 7:49 pm
  • Hi, Andrew again, I still have a question that if we move the encryption to HDFS level, we no longer can enable encryption per table I think? I assume encryption will impact performance to some ...
    Liu, Ming (Ming)Liu, Ming (Ming)
    Jun 6, 2016 at 4:08 pm
    Jun 7, 2016 at 3:12 am
  • Hi, We met a weird scenario in our production environment. IndexOutOfBoundsException is thrown while retrieving mid key of the storefile after region compaction. Log Snippet : ----------------- ...
    Pankaj krPankaj kr
    Jun 3, 2016 at 3:13 pm
    Jun 6, 2016 at 8:51 am
  • in hbase 0.98.10, class HRegionServer method openRegion line 3827 when RS open region, if this region is already opened by RS, we will check hbase:meta to see if hbase:meta is updated. but, if the RS ...
    WangYQWangYQ
    Jun 3, 2016 at 9:17 am
    Jun 3, 2016 at 2:26 pm
  • in hbase 0.98.10, class HRegion, line 1277 to 1286: there are two methods: "getStoreOpenAndCloseThread" and "getStoreFileOpenAndCloseThreadPool", getStoreOpenAndCloseThread is to get the thread pool ...
    WangYQWangYQ
    Jun 3, 2016 at 6:15 am
    Jun 3, 2016 at 6:33 am
  • Hi, all, We are trying to deploy the 'transparent encryption' feature of HBase , described in HBase reference guide: https://hbase.apache.org/book.html#hbase.encryption.server , in our product. We ...
    Liu, Ming (Ming)Liu, Ming (Ming)
    Jun 3, 2016 at 12:52 am
    Jun 3, 2016 at 4:27 am
  • Hi all, Running HBase 1.1.2: I'm running into an issue where during forced region failover (kill -9 on the regionserver), the new region location is not being updated in meta (and never is updated, ...
    DonmaiDonmai
    Jun 2, 2016 at 5:07 pm
    Jun 2, 2016 at 5:07 pm
  • in hbase 0.98.10, class HMaster, method startServiceThread, hmaster open a thread poolwith type MASTER_OPEN_REGION, but this pool is not used in any place can remove this. thanks
    WangYQWangYQ
    Jun 2, 2016 at 11:56 am
    Jun 3, 2016 at 2:30 pm
  • Hello, There is very little information that I can find online with regards to recommended dfs.block.size setting for HBase. Often it conflates with the HBase blocksize, which we know should be ...
    Bryan BeaudreaultBryan Beaudreault
    Jun 1, 2016 at 3:52 pm
    Jun 1, 2016 at 6:22 pm
  • Hi, Looking in the archives, there's an old thread on this topic: http://mail-archives.apache.org/mod_mbox/hbase-user/201407.mbox/%3C1405526793.13450.YahooMailNeo@web140605.mail.bf1.yahoo.com%3E ...
    Gunnar TapperGunnar Tapper
    May 31, 2016 at 7:05 pm
    May 31, 2016 at 7:05 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
  • 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
  • Unscubscribe me too Thanks & Regards Rinku Garg C: +91 941.740.5922 <span class="m_body_email_addr" title="29f5318ea44dabb70f91cafc54f698fb" rinku.garg@fisglobal.com</span  Please consider the ...
    Garg, RinkuGarg, Rinku
    May 31, 2016 at 4:21 am
    May 31, 2016 at 6:54 pm
  • ________________________________
    Manisha SethiManisha Sethi
    May 31, 2016 at 4:19 am
    May 31, 2016 at 4:19 am
  • 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 1.0.1.1, I updated 0.98 to ...
    聪聪聪聪
    May 31, 2016 at 2:03 am
    Jun 3, 2016 at 3:43 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
  • 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
  • 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 13, 2016 at 5:36 pm
  • 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
  • Congratulations, Mikhail !
    Ted YuTed Yu
    May 26, 2016 at 6:47 pm
    May 27, 2016 at 4:34 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
  • ​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
  • 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
  • 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, 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 ...
    ThibThib
    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
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