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HBase >> mail # user >> Merging regions issue


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Jean-Marc Spaggiari 2012-12-04, 22:46
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Jean-Marc Spaggiari 2012-12-04, 22:54
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Marcos Ortiz 2012-12-05, 02:02
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Re: Merging regions issue
One last question, Jean-Marc.
Exactly, What version of HBase are you using?
What version of Hadoop are you using?

On 12/04/2012 09:02 PM, Marcos Ortiz wrote:
> Regards, Jean-Marc
> On 12/04/2012 05:54 PM, Jean-Marc Spaggiari wrote:
>> Sorry for replying so quickly to myself.
>>
>> So, here is what I did.
>>
>> I had a table with only "few" lines". about 20 000.
>>
>> Table was split over 16 regions.
>>
>> I merged all the regions into one, then asked HBase via the HTML
>> interface to split it until I got more than 64 regions.
>>
>> Then I tried to re-merged them all together again into a single one.
>>
>> Now, bin/hbase hbck is giving me 65 inconsistencies detected. for
>> this table.
>>
>> All the inconsistencies are related to the table I played with.
>>
>> I don't know at what stage the issue happend, so it'S a bit difficult
>> to reproduce, but seems something went wrong in the process.
>>
>> JM
>>
>> 2012/12/4, Jean-Marc Spaggiari <[EMAIL PROTECTED]>:
>>> Hi,
>>>
>>> While merging many regions, I'm getting this error for some of them:
>>>
>>> 12/12/04 17:45:16 FATAL util.Merge: Merge failed
>>> java.io.IOException: Files have same sequenceid: 75533866
>>>     at
>>> org.apache.hadoop.hbase.regionserver.HRegion.merge(HRegion.java:4080)
>>>     at org.apache.hadoop.hbase.util.Merge.merge(Merge.java:291)
>>>     at
>>> org.apache.hadoop.hbase.util.Merge.mergeTwoRegions(Merge.java:242)
>>>     at org.apache.hadoop.hbase.util.Merge.run(Merge.java:111)
>>>     at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
>>>     at org.apache.hadoop.hbase.util.Merge.main(Merge.java:387)
> It seems there's an error with Merge process, because it' seems which
> is repeating the ID for
> files when you repeat the process of Merging regions.
> Have you looked in HBASE's JIRAs about this problem?
>
>>>
>>> Any idea why?
>>>
>>> Thanks,
>>>
>>> JM
>>>
>>
>

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Marcos Luis Ortíz Valmaseda
about.me/marcosortiz <http://about.me/marcosortiz>
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Jean-Marc Spaggiari 2012-12-05, 17:30
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Jean-Marc Spaggiari 2012-12-05, 18:46
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Jean-Marc Spaggiari 2012-12-06, 00:30
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB