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From: de Souza Medeiros Andre <andre.medeiros@aalto.fi>
To: "user@hbase.apache.org" <user@hbase.apache.org>
Subject: RE: HTable.getEndKeys() returning empty results
Thread-Topic: HTable.getEndKeys() returning empty results
Thread-Index: Acz9SAYLFo+KE3P3RaCnK/UmIMbmXf//5RGAgABUW6M=
Date: Thu, 8 Mar 2012 19:50:54 +0000
Message-ID: <460ED1013765BD4A92CDA53C2082DCC68DD8D49D@EXMDB02.org.aalto.fi>
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Thanks for the answer.=0A=
This is quite confusing though, what is the point of having a method to ret=
rieve the last key if we know that anyway it will be an empty byte array?=
=0A=
=0A=
Or does this happen only with one-region tables?=0A=
=0A=
Any way, is there some way of getting the last _data_ row of a table? Other=
 than scanning the whole thing...=0A=
=0A=
Thanks,=0A=
- Andre Medeiros=0A=
________________________________________=0A=
From: saint.ack@gmail.com [saint.ack@gmail.com] on behalf of Stack [stack@d=
uboce.net]=0A=
Sent: Thursday, March 08, 2012 18:48=0A=
To: user@hbase.apache.org=0A=
Subject: Re: HTable.getEndKeys() returning empty results=0A=
=0A=
On Thu, Mar 8, 2012 at 8:25 AM, de Souza Medeiros Andre=0A=
<andre.medeiros@aalto.fi> wrote:=0A=
> Hi all,=0A=
>=0A=
> Has someone had problems with HTable.getEndKeys() method? In my applicati=
on it returns an array of byte[], but the first (and only) byte[] is empty,=
 so essentially it's telling me that the (single) region has no end key.=0A=
>=0A=
> The table has 3 rows and I'm running standalone HBase 0.90.4 CDH3u3 on my=
 local machine. Moreover, the call getEndKeys() is executed immediately aft=
er I put rows in the table.=0A=
>=0A=
> Do I need to wait until the .META. table gets updated with the regions' e=
nd row keys?=0A=
> Does HTable.getEndKeys() work only in a fully distributed mode?=0A=
> Is there any other way of getting the last row in a table? (this is my ob=
jective after all)=0A=
>=0A=
=0A=
An empty byte array is the last key in a table of one region only.  An=0A=
hbase table uses empty byte array as both the start and end row=0A=
signifier as per the bigtable paper (I don't see this explicitly=0A=
called out in the reference guide but I'm probably not looking in=0A=
right place).=0A=
=0A=
St.Ack=0A=