Whats the full error stack on the client ?
Are you using a pre-build thrift client or you own ? If the later try using a pre built client first, like Hector or pycassa. If it works there look into how that code works and go from there.
Freelance Cassandra Developer
BTW, thanks for chiming in!
No-no, I'm using Thrift client, not inserting via cql.
I'm serializing via CompositeType, actually. CompositeType.getInstance(UTF8Type, UTF8Type).decompose(["firstkeypart", "secondkeypart"]);
Hm... From what you say I understand that it's technically possible :/
So I must be wrong somewhere,