just exit in case of duplicated volume directories were loaded

weed/command/volume.go

@@ -267,7 +267,7 @@ func (v VolumeServerOptions) startVolumeServer(volumeFolders, maxVolumeCounts, v
 
 	stopChan := make(chan bool)
 	grace.OnInterrupt(func() {
-		fmt.Println("volume server has be killed")
+		fmt.Println("volume server has been killed")
 
 		// Stop heartbeats
 		if !volumeServer.StopHeartbeat() {

weed/server/volume_grpc_client_to_master.go

@@ -3,7 +3,6 @@ package weed_server
 import (
 	"fmt"
 	"os"
-	"syscall"
 	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/operation"
@@ -121,9 +120,7 @@ func (vs *VolumeServer) doHeartbeat(masterAddress pb.ServerAddress, grpcDialOpti
 			}
 			if in.HasDuplicatedDirectory {
 				glog.Error("Shut Down Volume Server due to duplicated volume directory")
-				glog.V(0).Infof("send SIGINT to Volume Server")
-				p, _ := os.FindProcess(vs.pid)
-				p.Signal(syscall.SIGINT)
+				os.Exit(1)
 			}
 			if in.GetVolumeSizeLimit() != 0 && vs.store.GetVolumeSizeLimit() != in.GetVolumeSizeLimit() {
 				vs.store.SetVolumeSizeLimit(in.GetVolumeSizeLimit())

weed/server/volume_server.go

@@ -2,7 +2,6 @@ package weed_server
 
 import (
 	"net/http"
-	"os"
 	"sync"
 
 	"github.com/chrislusf/seaweedfs/weed/pb"
@@ -45,7 +44,6 @@ type VolumeServer struct {
 	fileSizeLimitBytes      int64
 	isHeartbeating          bool
 	stopChan                chan bool
-	pid                     int
 }
 
 func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
@@ -89,7 +87,6 @@ func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
 		inFlightDownloadDataLimitCond: sync.NewCond(new(sync.Mutex)),
 		concurrentUploadLimit:         concurrentUploadLimit,
 		concurrentDownloadLimit:       concurrentDownloadLimit,
-		pid:                           os.Getpid(),
 	}
 	vs.SeedMasterNodes = masterNodes