Should check the return value of protobuf Message.mergeDelimitedFrom

    /**
     * Like {@link #mergeFrom(InputStream)}, but does not read until EOF. Instead, the size of the
     * message (encoded as a varint) is read first, then the message data. Use {@link
     * MessageLite#writeDelimitedTo(OutputStream)} to write messages in this format.
     *
     * @return true if successful, or false if the stream is at EOF when the method starts. Any
     *     other error (including reaching EOF during parsing) causes an exception to be thrown.
     * @throws InvalidProtocolBufferException the bytes read are not syntactically correct
     *     according to the protobuf wire format specification. The data is corrupt, incomplete,
     *     or was never a protobuf in the first place.
     * @throws IOException an I/O error reading from the stream
     */