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Region locality and .META. region
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| May 16, 2011 | |||||
 Ophir Cohen |
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Region containing .META. frozen March 23, 2011 06:23:41 AM Hi all, We are using CDH3B4. The RegionServer containing .META. stopped working under normal load. The region server process was up, it could be viewed in hbase admin interface, but the requests, regions, usedHeap, maxHeap metrics were … meta region cpu contention December 23, 2010 06:30:38 PM We are doing a map-reduce run to extract all keys from 500 tables with few million records each. What we noticed is that it seems that the region server that holds the .meta. is somewhat CPU bound. Question, is it possible to nail or create… Inconsistent META data for a region. January 27, 2011 11:15:43 PM Howdy, I was trying to use "add_table.rb" to restore a table that I had copied the hdfs files for, and I had some trouble. Now when I run "hbase hbck" I get the following: ... ERROR: Region test,,1296067171940.0200bfe58a9e9fadf8ebfa523c47332f.… region server hosting .META. table July 23, 2010 12:38:11 PM Hi, We are using HBase 0.20.5 We recently experienced loss of region server hosting .META. table If someone can point me to the code which handles this scenario, that would be great. Re: bug report: opening hbase region takes too long , making the region not available for more than August 19, 2010 11:38:45 AM Jonathan: We saw similar issue using HBASE 0.20.6 with HBASE-2473 Caused by: org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region HB_INC_POST_0818-ERROR_SAMPLES-1282193650093,,1282193650831 at… Worried about NoServerForRegionException: No server address listed in .META. for region November 12, 2010 07:14:43 AM Hi again, we have a 1 master, 3 data nodes Hadoop+HBase cluster for a PoC. I ran into "Too many open files" errors on the region server during load testing. No problem as such. But now, after shutting down and starting up again, when trying to… Region server blocking updates for a region for 90s September 24, 2010 11:12:05 AM Hey, We seem to have come across a bug in hbase with how it is flushing the memstore when it is full, I think it's related to this… Trying to contact region "Some region" February 22, 2011 08:28:52 AM What does this exception signify: org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact region server Some server, retryOnlyOne=true, index=0, islastrow=false, tries=9, numtries=10, i=0, listsize=405,… Region splits in 0.89... August 26, 2010 02:00:44 PM My hbase table issued a mass split after I loaded regions with greater sizes than maxfilesize.. (my bad..) Now, when I try accessing the master through the web interface, it just hangs... And, if I scan the META, I get the parent regions set to… What's the region server doing? March 1, 2011 07:08:49 PM My cluster (10 nodes, hbase-0.20.6 + hadoop 0.20.2) is very very slow for any operation like disable table or delete. Master's thread dump says they are blocked by the metaScanner thread. When I looked at the log file on the .META RS there are no… getting region PUT errors. September 28, 2010 12:54:33 PM I am using rest and getting following errors on some insertions: 2010-09-28 10:51:07,215 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: org.apache.hadoop.hbase.regionserver.WrongRegionException: Requested row out of range for HRegion… Region server OME April 17, 2011 08:02:51 PM Hi, My HBase deployment has been working great but recently the regionservers always got out of memory error. The symptom is like this: region servers failed with OME, and then I restarted them. One of region servers used up the maximum memory I… Re: Region replication? April 19, 2011 03:10:04 PM This is kind of true. There is only one regionserver to handle the reads, but there are multiple copies of the data to handle fail-over. On Tue, Apr 19, 2011 at 12:33 PM, Otis Gospodnetic <otis_gosp### @yahoo.com> wrote: > My question… region not served October 23, 2010 04:01:26 PM This is after namenode crash, and cold restart of everything, it seems that meta data is wrong about multiple regions; http://pastebin.com/yMVmqpUY http://pastebin.com/8hXqJM7R Any ideas? Maybe some flushing race condition when a region was… RE: Region servers down... August 24, 2010 08:37:08 PM Thank you J-D. The out file is like this. It has an "NullPointerException" error. 2010-08-24 02:30:14.187::INFO: Logging to STDERR via org.mortbay.log.StdErrLog 2010-08-24 02:30:14.187::INFO: jetty-6.1.14 2010-08-24 02:30:14.122::INFO: … Re: Region servers down... August 24, 2010 11:10:12 AM It would be beneficial to separate the RS on 192.168.158.179 onto another machine. 2010/8/23 xiujin yang <xiujin### @hotmail.com> > > Hi > > My cluster is in this way. > Hadoop & HBase are deployed on different machine.… Re: Region servers down... August 24, 2010 01:01:31 AM I don't really see the cause of the shutdown in there, it seems it was already under way. Do you see messages starting with "We slept" and then telling how long it slept? It should be not very far from that in the log. J-D 2010/8/23 xiujin yang… Region Balancing February 2, 2011 01:52:04 PM I know there were some changes in .90 in terms of how region balancing occurs. Is there a resource somewhere that describes the options for the configuration? Per Jonathan Gray's recommendation we are trying to keep our region count down to 100 per… region doesn't split after 32+ GB September 27, 2010 06:27:03 PM I'm sequentially importing ~1 billion small rows (32 byte keys) into a table called StatAreaModelLink. I realize that sequential insertion isn't efficient by design, but I'm not in a hurry so I let it run all weekend. It's been proceeding quickly… Region loadbalancing December 13, 2010 10:37:49 AM Hi all, we are using HBase 0.20.6 on a cluster of about 25 nodes with about 30k regions and are experiencing as issue which causes running M/R jobs to fail. When we restart single RegionServer, then happens the following: 1) all regions of… How to set region with _SESSION April 26, 2011 hi how can I set the region (en, da, de etc) with mod_rewrite? the rewrite condition has to look like this www.domain.com/en/ www.domain.com/dk/… C# Regex for a match outside a specific region April 8, 2011 I have to find occurrences of a certain string (needle) within another string (haystack) that don't occur between specific "braces". For example… Should I Populate Country/Region Names at DB or Application Level? January 9, 2011 I'm going through a tough decision (at least for me)... My website would have a list of countries in dropdown list and list of cities based on… MySQL relations for country region and town tables February 18, 2011 Hi all, I am trying to figure out the best method to relate country, region and town tables. On my website I want the user to be able to just enter… Meta http-equiv - is it sent as part of an HTTP header, or does the client parse the body for meta tags? March 8, 2011 Howdy: Wikipedia seems to imply that <meta http-equiv> in a web page causes the server to update the response header, but that doesn't sound… Set the path of web app in META-INF/context.xml? November 26, 2009 I'm tryin to change the path of a deployed war file in Tomcat. Reading the documentation I can't figure out if this is possible without moving the… Why meta refresh followed by 2 redirects? January 13, 2011 I have encountered several websites where the initial visit by a user results in a http-equiv refresh to another (usually gibberish) url, which then… META Charset html April 4, 2011 Is possible to add two meta , I mean something like this <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"> <META… Wordpress query_posts to look at meta info April 19, 2011 Hey. I am looking to run a query with query_posts that lets me look at meta_fields. I have done this once before and achieved the result I wanted… Php exploding text in keywords meta tag March 16, 2011 I am trying to explode every individual word in my page titles to use as separate keywords. So if I had the page title "This is my web page" then my… Trouble getting meta description from some sites using php February 6, 2011 I cannot fetch the meta description tag from some sites, one in particular is you-tube. I have tried using "get_meta_tags" however it does not… Export partial mysql meta data, possible? March 8, 2011 I want to save some specific records from a database to a file, thus: "select, export etc" * from tbl1 where ClientName = 'DemoAccount'; should… How would you use Meta Value to mimic this Google Maps Query? April 10, 2011 There is a wonderful example of using Google maps for a store locator here: http://code.google.com/apis/maps/articles/phpsqlsearch_v3.html The… How to determine if a mobile browser is meta-refresh capable? February 25, 2011 Many browsers in Japan (EZWeb, i-mode, etc) don't allow meta refresh, and in fact, they may display warning messages such as "This page uses newer… Mongodb/gridfs java-driver use with utf-8 meta data April 25, 2011 I am trying to use GridFS to load a file along with some meta data using the java-driver. (2.5.3) Things work fine as long as the meta-data is in… Java regular expression and escaping meta characters April 23, 2011 I am trying to write regexp for matching token embedded between two curly braces. For example if buffer Hello {World}, I want to get "World" token… Moving contents of META-INF/context.xml to tomcat/conf April 13, 2011 We are trying to take the environment specific configuration settings out of our war files, so we can deploy the same war file to dev/test/prod… Where to store page titles and meta descriptions of subpages? February 16, 2011 Hi Everyone, For the website I work on, all page data is in database (page title, meta tags, content), and I store all that in one table. Now, I… How to run SQL Query for multiple meta keys as columns, and their values as rows? April 7, 2011 Inside phpMyAdmin, I am working with custom meta fields in WordPress. Say I have custom meta for 3 fields- Address, Latitude, Longitude and wish to… Django: Creating a unique identifier for a user based on request.META values February 22, 2011 I'm looking at creating an anonymous poll. However, I want to prevent users from voting twice. I was thinking of hashing some request.META values… | |||||
(24 lines) May 16, 2011 13:28