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From Shuge Lee <shuge....@gmail.com>
Subject UUIDs must be exactly 16 bytes ?
Date Wed, 05 May 2010 09:34:52 GMT
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

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