assertTrue(initialActive >= 2, "Should have at least 2 active regions");

            // Test buffer release and reuse
            bufferManager.releaseSendRegion(sendRegion);
            bufferManager.releaseReceiveRegion(recvRegion);

            // Allocate again to test pooling
            RdmaMemoryRegion newSendRegion = bufferManager.getSendRegion(4096);

            // Parse response
            ServerMessageBlock2 response = parseResponse(responseBuffer);
            request.setResponse(response);
            
        } finally {
            bufferManager.releaseSendRegion(sendRegion);
        }
    }
    
    private void waitForSendCredit() throws IOException {
        long deadline = System.currentTimeMillis() + 5000;  // 5 second timeout