diff --git a/app/proxy/proxy.go b/app/proxy/proxy.go
index d1db774fb..4b354ac2f 100644
--- a/app/proxy/proxy.go
+++ b/app/proxy/proxy.go
@@ -92,7 +92,7 @@ func (this *ProxyConnection) Read(b []byte) (int, error) {
 
 func (this *ProxyConnection) Write(b []byte) (int, error) {
 	if this.closed {
-		return 0, io.EOF
+		return 0, errors.New("Proxy|Outbound: Writing into closed connection.")
 	}
 	return this.writer.Write(b)
 }
diff --git a/common/io/buffered_writer.go b/common/io/buffered_writer.go
index 0095c7900..c6b339586 100644
--- a/common/io/buffered_writer.go
+++ b/common/io/buffered_writer.go
@@ -27,7 +27,7 @@ func (this *BufferedWriter) ReadFrom(reader io.Reader) (int64, error) {
 	defer this.Unlock()
 
 	if this.writer == nil {
-		return 0, io.EOF
+		return 0, io.ErrClosedPipe
 	}
 
 	totalBytes := int64(0)
@@ -49,7 +49,7 @@ func (this *BufferedWriter) Write(b []byte) (int, error) {
 	defer this.Unlock()
 
 	if this.writer == nil {
-		return 0, io.EOF
+		return 0, io.ErrClosedPipe
 	}
 
 	if !this.cached {
@@ -67,7 +67,7 @@ func (this *BufferedWriter) Flush() error {
 	defer this.Unlock()
 
 	if this.writer == nil {
-		return io.EOF
+		return io.ErrClosedPipe
 	}
 
 	return this.FlushWithoutLock()
diff --git a/common/io/chain_writer.go b/common/io/chain_writer.go
index 4d6fc4797..3c51b10f3 100644
--- a/common/io/chain_writer.go
+++ b/common/io/chain_writer.go
@@ -20,7 +20,7 @@ func NewChainWriter(writer Writer) *ChainWriter {
 
 func (this *ChainWriter) Write(payload []byte) (int, error) {
 	if this.writer == nil {
-		return 0, io.EOF
+		return 0, io.ErrClosedPipe
 	}
 
 	size := len(payload)
@@ -30,7 +30,7 @@ func (this *ChainWriter) Write(payload []byte) (int, error) {
 	this.Lock()
 	defer this.Unlock()
 	if this.writer == nil {
-		return 0, io.EOF
+		return 0, io.ErrClosedPipe
 	}
 
 	err := this.writer.Write(buffer)
diff --git a/proxy/vmess/outbound/outbound.go b/proxy/vmess/outbound/outbound.go
index f8da7b60e..5ba962763 100644
--- a/proxy/vmess/outbound/outbound.go
+++ b/proxy/vmess/outbound/outbound.go
@@ -102,6 +102,7 @@ func (this *VMessOutboundHandler) handleRequest(session *encoding.ClientSession,
 	}
 	if !payload.IsEmpty() {
 		if err := streamWriter.Write(payload); err != nil {
+			log.Info("VMess|Outbound: Failed to write payload. Disabling connection reuse.")
 			conn.SetReusable(false)
 		}
 	}
diff --git a/transport/internet/ws/wsconn.go b/transport/internet/ws/wsconn.go
index 073c8da25..2e310002c 100644
--- a/transport/internet/ws/wsconn.go
+++ b/transport/internet/ws/wsconn.go
@@ -30,9 +30,7 @@ func (ws *wsconn) Read(b []byte) (n int, err error) {
 }
 
 func (ws *wsconn) read(b []byte) (n int, err error) {
-
 	if ws.connClosing {
-
 		return 0, io.EOF
 	}
 
@@ -79,9 +77,8 @@ func (ws *wsconn) readNext(b []byte) (n int, err error) {
 
 func (ws *wsconn) Write(b []byte) (n int, err error) {
 	ws.wlock.Lock()
-
 	if ws.connClosing {
-		return 0, io.EOF
+		return 0, io.ErrClosedPipe
 	}
 
 	n, err = ws.write(b)
diff --git a/transport/ray/direct.go b/transport/ray/direct.go
index 86dcc9319..719b9e4f6 100644
--- a/transport/ray/direct.go
+++ b/transport/ray/direct.go
@@ -1,7 +1,6 @@
 package ray
 
 import (
-	"errors"
 	"io"
 	"sync"
 	"time"
@@ -13,10 +12,6 @@ const (
 	bufferSize = 128
 )
 
-var (
-	ErrIOTimeout = errors.New("IO Timeout")
-)
-
 // NewRay creates a new Ray for direct traffic transport.
 func NewRay() Ray {
 	return &directRay{
@@ -79,24 +74,24 @@ func (this *Stream) Read() (*alloc.Buffer, error) {
 func (this *Stream) Write(data *alloc.Buffer) error {
 	for !this.closed {
 		err := this.TryWriteOnce(data)
-		if err != ErrIOTimeout {
+		if err != io.ErrNoProgress {
 			return err
 		}
 	}
-	return io.EOF
+	return io.ErrClosedPipe
 }
 
 func (this *Stream) TryWriteOnce(data *alloc.Buffer) error {
 	this.access.RLock()
 	defer this.access.RUnlock()
 	if this.closed {
-		return io.EOF
+		return io.ErrClosedPipe
 	}
 	select {
 	case this.buffer <- data:
 		return nil
 	case <-time.After(2 * time.Second):
-		return ErrIOTimeout
+		return io.ErrNoProgress
 	}
 }