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HBase, mail # user - HRegionInfo returns empty values.


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RE: HRegionInfo returns empty values.
Anoop Sam John 2012-10-19, 08:57

Actually how many regions in your table?
Only one region? In that case it will be having startkey and endkey as empty.. So your case what it prints looks to be correct.
-Anoop-
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From: Henry JunYoung KIM [[EMAIL PROTECTED]]
Sent: Friday, October 19, 2012 2:13 PM
To: [EMAIL PROTECTED]
Subject: HRegionInfo returns empty values.

Hi, hbase-users.

To get a start-key and end-key from each region, I implemented simple code like this.

        HTable table = new HTable(admin.getConf(), admin.getTableName());
        NavigableMap<HRegionInfo, ServerName> locations = table.getRegionLocations();
        for (Map.Entry<HRegionInfo, ServerName> entry: locations.entrySet()) {
            HRegionInfo info = entry.getKey();

            System.out.println("server : " + entry.getValue().getHostname());
            System.out.println("start : " + info.getStartKey().length);
            System.out.println("end : " + info.getEndKey().length);
        }
but, this code returns

server : one-of-servers-name
start : 0
end : 0

start-key and end-key is empty. nothing!
data size is very strong. it's about 10,000.
from integer 0 to integer 10,000.

how could I get correct range of a region?

thanks for your concerns.