byte[] requestBuffer = negotiation.getRequestRaw();
        assertSame(testRequestBuffer, requestBuffer);

        // Verify multiple calls return the same instance
        assertSame(requestBuffer, negotiation.getRequestRaw());

        // Verify content is correct
        assertArrayEquals(new byte[] { 0x01, 0x02, 0x03, 0x04 }, requestBuffer);
    }

    @Test

            waitForSendCredit();
        }
        
        // Serialize request
        ByteBuffer requestBuffer = serializeRequest(request);
        
        // Register buffer if needed
        RdmaMemoryRegion sendRegion = bufferManager.getSendRegion(requestBuffer.remaining());
        sendRegion.getBuffer().put(requestBuffer);
        sendRegion.getBuffer().flip();
        
        try {
            // Send via RDMA