diff --git a/weed/filer2/filer_notify.go b/weed/filer2/filer_notify.go
index 29ba3eead..f85ee1db4 100644
--- a/weed/filer2/filer_notify.go
+++ b/weed/filer2/filer_notify.go
@@ -81,6 +81,7 @@ func (f *Filer) ReadLogBuffer(lastReadTime time.Time, eachEventFn func(fullpath
 
 	var buf []byte
 	newLastReadTime, buf = f.metaLogBuffer.ReadFromBuffer(lastReadTime)
+	var processedTs int64
 
 	for pos := 0; pos+4 < len(buf); {
 
@@ -103,7 +104,10 @@ func (f *Filer) ReadLogBuffer(lastReadTime time.Time, eachEventFn func(fullpath
 
 		err = eachEventFn(event.Directory, event.EventNotification)
 
+		processedTs = logEntry.TsNs
+
 		if err != nil {
+			newLastReadTime = time.Unix(0, processedTs)
 			return
 		}
 
@@ -111,6 +115,7 @@ func (f *Filer) ReadLogBuffer(lastReadTime time.Time, eachEventFn func(fullpath
 
 	}
 
+	newLastReadTime = time.Unix(0, processedTs)
 	return
 
 }
diff --git a/weed/queue/log_buffer.go b/weed/queue/log_buffer.go
index 325fcbf48..0a8298be4 100644
--- a/weed/queue/log_buffer.go
+++ b/weed/queue/log_buffer.go
@@ -1,6 +1,8 @@
 package queue
 
 import (
+	"fmt"
+	"runtime/debug"
 	"sync"
 	"time"
 
@@ -11,6 +13,12 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
+type dataToFlush struct {
+	startTime time.Time
+	stopTime  time.Time
+	data      []byte
+}
+
 type LogBuffer struct {
 	buf           []byte
 	idx           []int
@@ -22,6 +30,7 @@ type LogBuffer struct {
 	flushFn       func(startTime, stopTime time.Time, buf []byte)
 	notifyFn      func()
 	isStopping    bool
+	flushChan     chan *dataToFlush
 	sync.RWMutex
 }
 
@@ -32,8 +41,10 @@ func NewLogBuffer(flushInterval time.Duration, flushFn func(startTime, stopTime
 		flushInterval: flushInterval,
 		flushFn:       flushFn,
 		notifyFn:      notifyFn,
+		flushChan:     make(chan *dataToFlush, 256),
 	}
 	go lb.loopFlush()
+	go lb.loopInterval()
 	return lb
 }
 
@@ -62,7 +73,7 @@ func (m *LogBuffer) AddToBuffer(ts time.Time, key, data []byte) {
 	}
 
 	if m.startTime.Add(m.flushInterval).Before(ts) || len(m.buf)-m.pos < size+4 {
-		m.flush()
+		m.flushChan <- m.copyToFlush()
 		m.startTime = ts
 		if len(m.buf) < size+4 {
 			m.buf = make([]byte, 2*size+4)
@@ -83,27 +94,45 @@ func (m *LogBuffer) Shutdown() {
 	}
 	m.isStopping = true
 	m.Lock()
-	m.flush()
+	toFlush := m.copyToFlush()
 	m.Unlock()
+	m.flushChan <- toFlush
+	close(m.flushChan)
 }
 
 func (m *LogBuffer) loopFlush() {
+	for d := range m.flushChan {
+		if d != nil {
+			m.flushFn(d.startTime, d.stopTime, d.data)
+		}
+	}
+}
+
+func (m *LogBuffer) loopInterval() {
 	for !m.isStopping {
 		m.Lock()
-		m.flush()
+		toFlush := m.copyToFlush()
 		m.Unlock()
+		m.flushChan <- toFlush
 		time.Sleep(m.flushInterval)
 	}
 }
 
-func (m *LogBuffer) flush() {
+func (m *LogBuffer) copyToFlush() *dataToFlush {
 
 	if m.flushFn != nil && m.pos > 0 {
-		// fmt.Printf("flush buffer %d pos %d empty space %d\n", len(m.buf), m.pos, len(m.buf)-m.pos)
-		m.flushFn(m.startTime, m.stopTime, m.buf[:m.pos])
+		fmt.Printf("flush buffer %d pos %d empty space %d\n", len(m.buf), m.pos, len(m.buf)-m.pos)
+		debug.PrintStack()
+		d := &dataToFlush{
+			startTime: m.startTime,
+			stopTime:  m.stopTime,
+			data:      copiedBytes(m.buf[:m.pos]),
+		}
 		m.pos = 0
 		m.idx = m.idx[:0]
+		return d
 	}
+	return nil
 }
 
 func (m *LogBuffer) ReadFromBuffer(lastReadTime time.Time) (ts time.Time, bufferCopy []byte) {
@@ -125,8 +154,14 @@ func (m *LogBuffer) ReadFromBuffer(lastReadTime time.Time) (ts time.Time, buffer
 
 	lastTs := lastReadTime.UnixNano()
 	l, h := 0, len(m.idx)-1
+	/*
+		for i, pos := range m.idx {
+			ts := readTs(m.buf, pos)
+			fmt.Printf("entry %d ts: %v offset:%d\n", i, time.Unix(0,ts), pos)
+		}
+		fmt.Printf("l=%d, h=%d\n", l, h)
+	*/
 
-	// fmt.Printf("l=%d, h=%d\n", l, h)
 	for {
 		mid := (l + h) / 2
 		pos := m.idx[mid]