We don't know anything about it, because the blog post is slightly meager.. That said, this reads more like a byte[] array or similar to me, since you are read

We don't know anything about it, because the blog post is slightly meager.. That said, this reads more like a byte[] array or similar to me, since you are reading data from the net/a stream. Somewhere there will be a process to interpret these bytes as a string in a specific encoding, but the error 'sounds' like being related to the raw buffer of power of 2 size bytes.