// Arrange
        int access = 0x01;
        int errorCode = 0xC0000022; // Example error code (STATUS_ACCESS_DENIED)
        // Simulate RPC error
        doAnswer(invocation -> {
            MsrpcSamrOpenDomain rpc = invocation.getArgument(0);
            rpc.retval = errorCode; // Simulate error
            return null;
        }).when(mockDcerpcHandle).sendrecv(any(MsrpcSamrOpenDomain.class));

// flags and shouldn't be considered as replacement
// for os.OpenFile().
func LockedOpenFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
	return lockedOpenFile(path, flag, perm, 0)
}

// Open - Call os.OpenFile
func Open(path string, flag int, perm os.FileMode) (*os.File, error) {
	return os.OpenFile(path, flag, perm)

    // Getters for all statistics...
}
```

## 9. Error Handling and Fallback

### 9.1 RDMA Error Recovery
```java
public class RdmaErrorHandler {
    public void handleRdmaError(RdmaConnection connection, Exception error) {
        log.warn("RDMA error occurred: {}", error.getMessage());
        
        if (isRecoverableError(error)) {
            // Attempt to recover connection
            try {

        verify(response).isError();
    }

    @Test
    @DisplayName("Test Response interface methods - error")
    void testError() {
        // Given
        doNothing().when(response).error();

        // When
        response.error();

        // Then
        verify(response).error();
    }

    @Test
    @DisplayName("Test Response interface methods - getExpiration")

package cmd

import (
	"context"
	"net/http"
	"net/url"
)

// Writes S3 compatible copy part range error.
func writeCopyPartErr(ctx context.Context, w http.ResponseWriter, err error, url *url.URL) {
	switch err {
	case errInvalidRange:
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopyPartRange), url)
		return
	case errInvalidRangeSource:

}

// EncodeMsg implements msgp.Encodable
func (z InQueueStats) EncodeMsg(en *msgp.Writer) (err error) {
	// map header, size 0
	_ = z
	err = en.Append(0x80)
	if err != nil {
		return
	}
	return
}

// MarshalMsg implements msgp.Marshaler
func (z InQueueStats) MarshalMsg(b []byte) (o []byte, err error) {
	o = msgp.Require(b, z.Msgsize())
	// map header, size 0
	_ = z
	o = append(o, 0x80)

	}

	vn := PoolDecommissionInfo{}
	err := msgp.Decode(&buf, &vn)
	if err != nil {
		t.Error(err)
	}

	buf.Reset()
	msgp.Encode(&buf, &v)
	err = msgp.NewReader(&buf).Skip()
	if err != nil {
		t.Error(err)
	}
}

func BenchmarkEncodePoolDecommissionInfo(b *testing.B) {
	v := PoolDecommissionInfo{}
	var buf bytes.Buffer
	msgp.Encode(&buf, &v)

		t.Log("WARNING: TestEncodeDecodeBatchJobKV Msgsize() is inaccurate")
	}

	vn := BatchJobKV{}
	err := msgp.Decode(&buf, &vn)
	if err != nil {
		t.Error(err)
	}

	buf.Reset()
	msgp.Encode(&buf, &v)
	err = msgp.NewReader(&buf).Skip()
	if err != nil {
		t.Error(err)
	}
}

func BenchmarkEncodeBatchJobKV(b *testing.B) {
	v := BatchJobKV{}
	var buf bytes.Buffer
	msgp.Encode(&buf, &v)

	}

	vn := BatchJobKeyRotateEncryption{}
	err := msgp.Decode(&buf, &vn)
	if err != nil {
		t.Error(err)
	}

	buf.Reset()
	msgp.Encode(&buf, &v)
	err = msgp.NewReader(&buf).Skip()
	if err != nil {
		t.Error(err)
	}
}

func BenchmarkEncodeBatchJobKeyRotateEncryption(b *testing.B) {
	v := BatchJobKeyRotateEncryption{}
	var buf bytes.Buffer

	}

	vn := xlMetaDataDirDecoder{}
	err := msgp.Decode(&buf, &vn)
	if err != nil {
		t.Error(err)
	}

	buf.Reset()
	msgp.Encode(&buf, &v)
	err = msgp.NewReader(&buf).Skip()
	if err != nil {
		t.Error(err)
	}
}

func BenchmarkEncodexlMetaDataDirDecoder(b *testing.B) {
	v := xlMetaDataDirDecoder{}
	var buf bytes.Buffer
	msgp.Encode(&buf, &v)