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From 茅旭峰 <m9s...@gmail.com>
Subject Re: The whole key space is not covered by the .META.
Date Tue, 12 Apr 2011 02:12:46 GMT
>From the output of scan '.META.' I pasted before, we can see there are two
key ranges
which might cover the put key 'LCgwzrx2XTFkB2Ymz9HeJWPY0Ok='. They are

#1, 'LC3MILeAUy8HmRFgU5-ESE-9T7w=' -> 'LD4jOJWFyt4m7A3KGFST6d-uj3A='
#2, 'LC_vN8JYweYYsnKaKbpOo67kUNA=' -> 'some end key'

The output has less info about the second key range. And I also found some
log like

====
essential/hbase-0.90.1-CDH3B4/logs/hbase-hadoop-regionserver-cloud138.log.2011-03-21:2011-03-21
09:48:36,953 DEBUG
org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler: Processing
close of
table1,LC_vN8JYweYYsnKaKbpOo67kUNA=,1300594695996.ba8e0bffb79bda039f6800f78ad22dcd.
essential/hbase-0.90.1-CDH3B4/logs/hbase-hadoop-regionserver-cloud138.log.2011-03-21:2011-03-21
09:48:36,953 DEBUG org.apache.hadoop.hbase.regionserver.HRegion: Closing
table1,LC_vN8JYweYYsnKaKbpOo67kUNA=,1300594695996.ba8e0bffb79bda039f6800f78ad22dcd.:
disabling compactions & flushes
essential/hbase-0.90.1-CDH3B4/logs/hbase-hadoop-regionserver-cloud138.log.2011-03-21:2011-03-21
09:48:36,953 DEBUG org.apache.hadoop.hbase.regionserver.HRegion: Updates
disabled for region
table1,LC_vN8JYweYYsnKaKbpOo67kUNA=,1300594695996.ba8e0bffb79bda039f6800f78ad22dcd.
essential/hbase-0.90.1-CDH3B4/logs/hbase-hadoop-regionserver-cloud138.log.2011-03-21:2011-03-21
09:48:36,953 INFO org.apache.hadoop.hbase.regionserver.HRegion: Closed
table1,LC_vN8JYweYYsnKaKbpOo67kUNA=,1300594695996.ba8e0bffb79bda039f6800f78ad22dcd.
essential/hbase-0.90.1-CDH3B4/logs/hbase-hadoop-regionserver-cloud138.log.2011-03-21:2011-03-21
09:48:36,953 DEBUG
org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler: Closed
region
table1,LC_vN8JYweYYsnKaKbpOo67kUNA=,1300594695996.ba8e0bffb79bda039f6800f78ad22dcd.
====

It looks like the second had already been closed for some reason. Is it
possile that the info of that region
is not clean clearly? How can I check this in detail?

I'm guessing maybe 'getClosestRowBefore' returns the closed region in
HConnectionManager.locateRegionInMeta,
which is closed, so this leads to the problem.

2011/4/12 茅旭峰 <m9suns@gmail.com>

> We are using hadoop-CDH3B4 and hbase0.90.1-CDH3B4. I'll check the
> issue further, but my understanding is the meta info and the root
> region are saved by zookeeper, right? Do I need to check them there?
>
> m9suns
>
> 在 2011-4-12,0:40,Jean-Daniel Cryans <jdcryans@apache.org> 写道:
>
> > It's possible under some bugs, which HBase version are you using?
> >
> > J-D
> >
> > On Mon, Apr 11, 2011 at 4:50 AM, 茅旭峰 <m9suns@gmail.com> wrote:
> >> Hi,
> >>
> >> Is it possible that some table cannot cover the whole key space. What I
> saw
> >> was like
> >>
> >> ====
> >> hbase(main):006:0> put 'table1', 'abc', 'cfEStore:dasd', '123'
> >>
> >> 0 row(s) in 0.3030 seconds
> >>
> >> hbase(main):007:0> put 'table1', 'LCgwzrx2XTFkB2Ymz9HeJWPY0Ok=',
> >> 'cfEStore:dasd', '123'
> >>
> >> ERROR: java.io.IOException: HRegionInfo was null or empty in .META.,
> >>
> row=keyvalues={table1,LC_vN8JYweYYsnKaKbpOo67kUNA=,1300594695996.ba8e0bffb79bda039f6800f78ad22dcd./info:server/1300672190144/Put/vlen=14,
> >>
> table1,LC_vN8JYweYYsnKaKbpOo67kUNA=,1300594695996.ba8e0bffb79bda039f6800f78ad22dcd./info:serverstartcode/1300672190144/Put/vlen=8}
> >>
> >> Here is some help for this command:
> >> Put a cell 'value' at specified table/row/column and optionally
> >> timestamp coordinates.  To put a cell value into table 't1' at
> >> row 'r1' under column 'c1' marked with the time 'ts1', do:
> >>
> >>  hbase> put 't1', 'r1', 'c1', 'value', ts1
> >>
> >> ====
> >>
> >> I guess this means our table has lost some key range for the specific
> >> key 'LCgwzrx2XTFkB2Ymz9HeJWPY0Ok=',
> >> is this reasonable? I wonder what might cause this issue? How can I
> check
> >> it?
> >>
> >> One weird thing, I can see such lines like
> >>
> >> ====
> >>
> table1,LC3MILeAUy8HmRFgU5-ESE-9T7w=,1300519432575.0bdd3d8fa7fc710860a4ee51fc9c8625.
> >> LC3MILeAUy8HmRFgU5-ESE-9T7w= LD4jOJWFyt4m7A3KGFST6d-uj3A=
> >> ====
> >>
> >> from the web UI, which I think means the table has holds the key range
> for
> >> key 'LCgwzrx2XTFkB2Ymz9HeJWPY0Ok='
> >>
> >> I also have not seen any errors/warnings in the log file. Any
> suggestions?
> >>
> >> Thanks in advance.
> >>
>

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