problem with get_key_range in cassandra 0.4.1

[ROGER PUIG GANZA]

Hi all.
I'm benchmarking several  nosql datastores and I'm going nuts with Cassandra.
The version of Cassandra we are using is 0.4.1 I know 0.4.1 is a bit outdated 
but my implementation is done with that version.


The thing is that every time the test runs, I need to reset the data inside the 
datastore to try with different workloads.
Easy on mysql with a trunc sentence.
I need to delete all columns on each columnFamily. What I do is getting all the 
keys with get_key_range and iterating over the list  and removing them.
Like that:

List<String> keys = client.get_key_range(keyspace, columnFamily, min_value, 
max_value, count, defaultConsistencyLevel);
            Iterator<String> iterator = keys.iterator();
            String key;
            while (iterator.hasNext()) {
                  key = iterator.next();
                  client.remove(keyspace, key, path, time, 
defaultConsistencyLevel);
}

The problem is: client.get_key_range throws Internal error processing 
get_key_range

My questions are: is there any workaround?
                                                Am I missing any configuration 
setting which could help me?


Thank you very much in advance
Roger Puig Ganza