Transcoder error not reported correctly

When a custom transcoder has an error, certain CAS operations fail with an error about the operation being cancelled, which is misleading and doesn't point to the transcoder as a problem.

Logs:
Mar 7, 2013 10:20:37 AM net.spy.memcached.protocol.TCPMemcachedNodeImpl setupResend
WARNING: Discarding partially completed op: Cmd: 0 Opaque: 120 Key: *****
Mar 7, 2013 10:20:40 AM net.spy.memcached.auth.AuthThread$1 receivedStatus
INFO: Authenticated to 127.0.0.1/127.0.0.1:11210

The error occurs on the get on the future. It is in fact a marshalling error in the transcoder but that never gets reported.

Code:
OperationFuture<CASValue<documentType>> future = this.client.asyncGets(key, transcoder);
return future.get(5, TimeUnit.SECONDS);

Transcoder (incorrect):

@Component
public class TranscoderImpl<T> implements Transcoder<T> {

@Autowired
@Qualifier("JSON")
Marshaller marshaler;

@Autowired
@Qualifier("JSON")
Unmarshaller unmarshaler;

@Override
public boolean asyncDecode(CachedData arg0) {
// TODO Auto-generated method stub
return false;
}

@Override
public T decode(CachedData arg0) {
// TODO Auto-generated method stub
StreamSource str = new StreamSource(new java.io.ByteArrayInputStream(arg0.getData()));

Object obj;
try {
obj = unmarshaler.unmarshal(str);
} catch (Exception e) {
// TODO Auto-generated catch block
throw new RuntimeException(e);
}

return (T)obj;
}

@Override
public CachedData encode(T arg0) {
// TODO Auto-generated method stub
ByteArrayOutputStream sink = new ByteArrayOutputStream();

try {
marshaler.marshal(arg0, new StreamResult(sink));
} catch (Exception e) {
// TODO Auto-generated catch block
throw new RuntimeException(e);
}

return new CachedData(0, sink.toByteArray(), getMaxSize());
}

@Override
public int getMaxSize() {
// TODO Auto-generated method stub
return CachedData.MAX_SIZE;
}

}