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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-832) Problem with row keys beginnig with characters < than ',' and the region location cache
Date Wed, 27 Aug 2008 17:53:44 GMT

     [ https://issues.apache.org/jira/browse/HBASE-832?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jean-Daniel Cryans updated HBASE-832:

      Component/s: regionserver
    Fix Version/s:     (was: 0.19.0)
         Priority: Blocker  (was: Major)

Getting worse. Here is another symptom:

org.apache.hadoop.hbase.regionserver.WrongRegionException: org.apache.hadoop.hbase.regionserver.WrongRegionException:
Requested row out of range for HRegion web_pages,http://www.altitude737.com/choix_centre.html,1219807997979,
startKey='http://www.altitude737.com/choix_centre.html', getEndKey()='http://www.amoll.qc.ca/',
	at org.apache.hadoop.hbase.regionserver.HRegion.checkRow(HRegion.java:1703)
	at org.apache.hadoop.hbase.regionserver.HRegion.obtainRowLock(HRegion.java:1759)
	at org.apache.hadoop.hbase.regionserver.HRegion.batchUpdate(HRegion.java:1383)
	at org.apache.hadoop.hbase.regionserver.HRegionServer.batchUpdate(HRegionServer.java:1145)
	at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:473)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:896)

Made this a blocker for 0.2.1 and 0.18.0

> Problem with row keys beginnig with characters < than ',' and the region location
> ---------------------------------------------------------------------------------------
>                 Key: HBASE-832
>                 URL: https://issues.apache.org/jira/browse/HBASE-832
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: client, regionserver
>    Affects Versions: 0.2.0
>            Reporter: Jean-Daniel Cryans
>            Priority: Blocker
>             Fix For: 0.2.1, 0.18.0
> We currently have a problem the way we design .META. row keys. When user table row keys
begin with characters lesser than ',' like a '$', any operation will fail when:
> - A client has a certain set of regions in cache
> - One region with the faulty row key splits 
> - The client receives a request for a row in the split region
> The reason is that it will first get a NSRE then it will try to locate a region using
the passed row key. For example: 
> Row in META: entities,,1216750777411
> Row passed: entities,$-94f9386f-e235-4cbd-aacc-37210a870991,99999999999999
> The passed row is lesser then the row in .META.

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