And also, what are your cell values look like?
Himanshu
On Sun, Jul 29, 2012 at 3:54 PM, <yuzhihong@gmail.com> wrote:
> Can you use 0.94 for your client jar ?
>
> Please show us the NullPointerException stack.
>
> Thanks
>
>
>
> On Jul 29, 2012, at 2:49 PM, Cyril Scetbon <cyril.scetbon@free.fr> wrote:
>
>> Hi,
>>
>> I'm testing AggregationClient functions to check if we could use coprocessors for
mathematical functions.
>>
>> The code I use is the following :
>>
>> package coreprocessor;
>>
>> import org.apache.hadoop.conf.Configuration;
>> import org.apache.hadoop.hbase.HBaseConfiguration;
>> import org.apache.hadoop.hbase.client.Scan;
>> import org.apache.hadoop.hbase.client.coprocessor.AggregationClient;
>> import org.apache.hadoop.hbase.util.Bytes;
>>
>> public class AggregationClientTest {
>>
>> private static final byte[] TABLE_NAME = Bytes.toBytes("ise");
>> private static final byte[] CF = Bytes.toBytes("core");
>>
>> public static void main(String[] args) throws Throwable {
>>
>> Configuration configuration = HBaseConfiguration.create();
>>
>> configuration.setLong("hbase.client.scanner.caching", 1000);
>> AggregationClient aggregationClient = new AggregationClient(
>> configuration);
>> Scan scan = new Scan();
>> scan.addColumn(CF, Bytes.toBytes("value"));
>> System.out.println("row count is " + aggregationClient.rowCount(TABLE_NAME,
null, scan));
>> System.out.println("avg is " + aggregationClient.avg(TABLE_NAME, null, scan));
>> System.out.println("sum is " + aggregationClient.sum(TABLE_NAME, null, scan));
>> }
>> }
>>
>> The only one working is the rowCount function. For others I get a NPE error !
>> I've checked that my table use only Long values for the column on which I work, and
I've only one row in my table :
>>
>> ROW COLUMN+CELL
>> id-cyr1 column=core:value, timestamp=1343596419845,
value=\x00\x00\x00\x00\x00\x00\x00\x0A
>>
>> The only thing I can add is that my hbase server's version is 0.94.0 and that I use
version 0.92.0 of the hbase jar
>>
>> any idea why it doesn't work ?
>>
>> thanks
>> Cyril SCETBON
>>
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