diff --git a/conf/wide.go b/conf/wide.go
index 7be32f9..006ebae 100644
--- a/conf/wide.go
+++ b/conf/wide.go
@@ -254,6 +254,8 @@ func FixedTimeCheckEnv() {
 }
 
 func checkEnv() {
+	defer util.Recover()
+
 	cmd := exec.Command("go", "version")
 	buf, err := cmd.CombinedOutput()
 	if nil != err {
diff --git a/event/events.go b/event/events.go
index 64ecb98..00e3eae 100644
--- a/event/events.go
+++ b/event/events.go
@@ -19,6 +19,7 @@ import (
 	"os"
 
 	"github.com/b3log/wide/log"
+	"github.com/b3log/wide/util"
 )
 
 const (
@@ -69,6 +70,8 @@ var UserEventQueues = queues{}
 // Load initializes the event handling.
 func Load() {
 	go func() {
+		defer util.Recover()
+
 		for event := range EventQueue {
 			logger.Debugf("Received a global event [code=%d]", event.Code)
 
@@ -106,6 +109,8 @@ func (ueqs queues) New(sid string) *UserEventQueue {
 	ueqs[sid] = q
 
 	go func() { // start listening
+		defer util.Recover()
+
 		for evt := range q.Queue {
 			logger.Debugf("Session [%s] received an event [%d]", sid, evt.Code)
 
diff --git a/output/build.go b/output/build.go
index fc188af..79913b0 100644
--- a/output/build.go
+++ b/output/build.go
@@ -160,6 +160,8 @@ func BuildHandler(w http.ResponseWriter, r *http.Request) {
 			channelRet["output"] = "<span class='build-succ'>" + i18n.Get(locale, "build-succ").(string) + "</span>\n"
 
 			go func() { // go install, for subsequent gocode lib-path
+				defer util.Recover()
+
 				cmd := exec.Command("go", "install")
 				cmd.Dir = curDir
 
diff --git a/output/run.go b/output/run.go
index b819f14..ae4e4a4 100644
--- a/output/run.go
+++ b/output/run.go
@@ -133,6 +133,8 @@ func RunHandler(w http.ResponseWriter, r *http.Request) {
 		}
 
 		go func() {
+			defer util.Recover()
+
 			buf := outputBuf{}
 
 			for {
diff --git a/playground/run.go b/playground/run.go
index bb6788d..cbdc18a 100644
--- a/playground/run.go
+++ b/playground/run.go
@@ -129,6 +129,8 @@ func RunHandler(w http.ResponseWriter, r *http.Request) {
 		}
 
 		go func() {
+			defer util.Recover()
+
 			buf := outputBuf{}
 
 			for {
diff --git a/session/sessions.go b/session/sessions.go
index 715526f..a05aedd 100644
--- a/session/sessions.go
+++ b/session/sessions.go
@@ -101,6 +101,8 @@ var mutex sync.Mutex
 // Invalid sessions: sessions that not used within 30 minutes, refers to WideSession.Updated field.
 func FixedTimeRelease() {
 	go func() {
+		defer util.Recover()
+
 		for _ = range time.Tick(time.Hour) {
 			hour, _ := time.ParseDuration("-30m")
 			threshold := time.Now().Add(hour)
@@ -133,6 +135,8 @@ func (u *userReport) report() string {
 // FixedTimeReport reports the Wide sessions status periodically (10 minutes).
 func FixedTimeReport() {
 	go func() {
+		defer util.Recover()
+
 		for _ = range time.Tick(10 * time.Minute) {
 			users := userReports{}
 			processSum := 0
@@ -332,6 +336,8 @@ func (sessions *wSessions) New(httpSession *sessions.Session, sid string) *WideS
 	}
 
 	go func() {
+		defer util.Recover()
+
 		workspaces := filepath.SplitList(conf.GetUserWorkspace(username))
 		for _, workspace := range workspaces {
 			filepath.Walk(filepath.Join(workspace, "src"), func(dirPath string, f os.FileInfo, err error) error {
@@ -356,6 +362,8 @@ func (sessions *wSessions) New(httpSession *sessions.Session, sid string) *WideS
 	}()
 
 	go func() {
+		defer util.Recover()
+
 		for {
 			select {
 			case event := <-watcher.Events:
diff --git a/session/users.go b/session/users.go
index 959e646..ff4499c 100644
--- a/session/users.go
+++ b/session/users.go
@@ -293,6 +293,8 @@ func SignUpUserHandler(w http.ResponseWriter, r *http.Request) {
 // Main goal of this function is to save user session content, for restoring session content while user open Wide next time.
 func FixedTimeSave() {
 	go func() {
+		defer util.Recover()
+
 		for _ = range time.Tick(time.Minute) {
 			users := getOnlineUsers()