Fix an issue with reusing closed network connetion, changing the way rateLimitedListener is initialized

pkg/server/minhttp/listen.go

@@ -27,7 +27,10 @@ import (
 // rateLimitedListener returns a Listener that accepts at most n simultaneous
 // connections from the provided Listener.
 func rateLimitedListener(l net.Listener, nconn int) net.Listener {
+	if nconn > 0 {
 		return &rateLimitListener{l, make(chan struct{}, nconn)}
+	}
+	return l
 }
 
 type rateLimitListener struct {

pkg/server/minhttp/net.go

@@ -92,11 +92,11 @@ func (n *minNet) getInheritedListeners() error {
 			l, err := net.FileListener(file)
 			if err != nil {
 				file.Close()
-				retErr = fmt.Errorf("error inheriting socket fd %d: %s", i, err)
+				retErr = iodine.New(fmt.Errorf("error inheriting socket fd %d: %s", i, err), nil)
 				return
 			}
 			if err := file.Close(); err != nil {
-				retErr = fmt.Errorf("error closing inherited socket fd %d: %s", i, err)
+				retErr = iodine.New(fmt.Errorf("error closing inherited socket fd %d: %s", i, err), nil)
 				return
 			}
 			n.inheritedListeners = append(n.inheritedListeners, l)
@@ -159,10 +159,7 @@ func (n *minNet) ListenTCP(nett string, laddr *net.TCPAddr) (net.Listener, error
 	if err != nil {
 		return nil, iodine.New(err, nil)
 	}
-	if n.connLimit > 0 {
+	n.activeListeners = append(n.activeListeners, rateLimitedListener(l, n.connLimit))
-		l = rateLimitedListener(l, n.connLimit)
-	}
-	n.activeListeners = append(n.activeListeners, l)
 	return l, nil
 }
 
@@ -197,10 +194,7 @@ func (n *minNet) ListenUnix(nett string, laddr *net.UnixAddr) (net.Listener, err
 	if err != nil {
 		return nil, iodine.New(err, nil)
 	}
-	if n.connLimit > 0 {
+	n.activeListeners = append(n.activeListeners, rateLimitedListener(l, n.connLimit))
-		l = rateLimitedListener(l, n.connLimit)
-	}
-	n.activeListeners = append(n.activeListeners, l)
 	return l, nil
 }
 

pkg/server/server.go

@@ -87,7 +87,7 @@ func getAPIServer(conf api.Config, apiHandler http.Handler) (*http.Server, error
 func getRPCServer(rpcHandler http.Handler) *http.Server {
 	// Minio server config
 	httpServer := &http.Server{
-		Addr:           "127.0.0.1:9001", // TODO make this configurable
+		Addr:           ":9001", // TODO make this configurable
 		Handler:        rpcHandler,
 		MaxHeaderBytes: 1 << 20,
 	}