In fact the sender chose the standard writeDelimited and the receiver chose to read without the delimiter. Both ways are in the standard, but both ends have to

In fact the sender chose the standard writeDelimited and the receiver chose to read without the delimiter. Both ways are in the standard, but both ends have to agree. One could argue that is a flaw in protobuf itself, but the problem here was not a non-standard implementation. The problem here was lack of experience and hasty finger pointing.