add 'errFlag = true' when got err in pkgHandler.Read loop clause in...

add 'errFlag = true' when got err in pkgHandler.Read loop clause in session.go:(Session)handlePackage

codec.go

@@ -21,6 +21,7 @@ type SessionCallback func(*Session) error
 // Reader is used to unmarshal a complete pkg from buffer
 type Reader interface {
 	// Parse pkg from buffer and if possible return a complete pkg
+	// If length of buf is not long enough, u should return {nil, nil}
 	Read(*Session, *bytes.Buffer) (interface{}, error)
 }
 

session.go

@@ -494,6 +494,7 @@ func (this *Session) handlePackage() {
 			pkg, err = this.pkgHandler.Read(this, pktBuf)
 			if err != nil {
 				log.Info("%s, [session.pkgHandler.Read] = error{%+v}", this.sessionToken(), err)
+				errFlag = true
 				exit = true
 				break
 			}