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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: UUIDs must be exactly 16 bytes ?
Date Wed, 05 May 2010 14:25:31 GMT
to elaborate, your row key is a uuid, but not your column name

On Wed, May 5, 2010 at 4:46 AM, roger schildmeijer
<schildmeijer@gmail.com> wrote:
> "'CompareWith' tells Cassandra how to sort the columns for slicing
> operations". It looks like your column name isn't using the correct type
> (TimeUUIDType).
>
> // Roger Schildmeijer
>
> On Wed, May 5, 2010 at 11:34 AM, Shuge Lee <shuge.lee@gmail.com> wrote:
>>
>> Hi all:
>>
>> in storage-conf.xml
>> ...
>>
>> <Keyspace Name="t">
>>   <ColumnFamily CompareWith="UTF8Type" Name="tt" />
>>
>> <ReplicaPlacementStrategy>org.apache.cassandra.locator.RackUnawareStrategy</ReplicaPlacementStrategy>
>>   <ReplicationFactor>1</ReplicationFactor>
>>
>> <EndPointSnitch>org.apache.cassandra.locator.EndPointSnitch</EndPointSnitch>
>>
>>   <ColumnFamily Name="tt"
>>                 CompareWith="TimeUUIDType" />
>> </Keyspace>
>> ...
>>
>> Python code
>> #!/usr/bin/env python
>>
>> import uuid
>> from pprint import pprint as pp
>>
>> import pycassa
>> from cassandra.ttypes import ConsistencyLevel
>>
>> keyspace = 't'
>> column_family = 'tt'
>> write_consistency_level = ConsistencyLevel.ONE
>>
>> cli = pycassa.connect()
>> cf = pycassa.ColumnFamily(cli, keyspace, column_family)
>>
>> key = uuid.uuid4().bytes_le
>> columns = {'subject': 'a'}
>> cf.insert(key, columns, write_consistency_level)
>>
>> Traceback
>>
>>     Traceback (most recent call last):
>>   File "/backup/code/luna/t.py", line 19, in <module>
>>     cf.insert(key, columns, write_consistency_level)
>>   File "/usr/lib/python2.6/site-packages/pycassa/columnfamily.py", line
>> 338, in insert
>>     self._wcl(write_consistency_level))
>>   File "/usr/lib/python2.6/site-packages/pycassa/connection.py", line 135,
>> in client_call
>>     return getattr(self._client, attr)(*args, **kwargs)
>>   File "/usr/lib/python2.6/site-packages/cassandra/Cassandra.py", line
>> 781, in batch_mutate
>>     self.recv_batch_mutate()
>>   File "/usr/lib/python2.6/site-packages/cassandra/Cassandra.py", line
>> 804, in recv_batch_mutate
>>     raise result.ire
>> cassandra.ttypes.InvalidRequestException:
>> InvalidRequestException(why='UUIDs must be exactly 16 bytes')
>>
>>
>> What's going on ?
>>
>>
>> --
>> Shuge Lee | Lee Li | 李蠡
>
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

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