Cassandra InvalidQueryException: Key may not be empty

Question

InvalidQueryException: Key may not be empty When using the Java Driver for DataStax Astra Cassandra DB.

I'm 100% sure that my partitionKey or my clusteringColumns are not empty. Can someone tell me what this error can mean besides that?

The same code worked 1 hour before what does that exception mean?

Answer 1

Thank you guys but I just found it myself.

I wrote a Long into an ByteBuffer and didn't use flip() afterwards.

 public static ByteBuffer toBB(Long x) {
    ByteBuffer bb = ByteBuffer.allocate(Long.BYTES);
    if (x == null) {
        return null;
    }
    bb.putLong(x);
    bb.flip(); //Added this line here and it works
    return bb;
}