diff --git a/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/disruptor/ack/SendAckSpanEventHandler.java b/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/disruptor/ack/SendAckSpanEventHandler.java
index fe9d4d023..317c5d108 100644
--- a/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/disruptor/ack/SendAckSpanEventHandler.java
+++ b/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/disruptor/ack/SendAckSpanEventHandler.java
@@ -26,19 +26,23 @@ public class SendAckSpanEventHandler implements EventHandler<AckSpanHolder> {
 
     @Override
     public void onEvent(AckSpanHolder event, long sequence, boolean endOfBatch) throws Exception {
-        if (buffer[bufferIdx] != null) {
-            return;
-        }
+        try {
+            if (buffer[bufferIdx] != null) {
+                return;
+            }
 
-        buffer[bufferIdx] = event.getData();
-        bufferIdx++;
+            buffer[bufferIdx] = event.getData();
+            bufferIdx++;
 
-        if (bufferIdx == buffer.length) {
-            bufferIdx = 0;
-        }
+            if (bufferIdx == buffer.length) {
+                bufferIdx = 0;
+            }
 
-        if (endOfBatch) {
-            HealthCollector.getCurrentHeathReading("SendAckSpanEventHandler").updateData(HeathReading.INFO, "AckSpan messages were successful consumed .");
+            if (endOfBatch) {
+                HealthCollector.getCurrentHeathReading("SendAckSpanEventHandler").updateData(HeathReading.INFO, "AckSpan messages were successful consumed .");
+            }
+        }finally {
+            event.setData(null);
         }
     }
 
diff --git a/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/disruptor/request/SendRequestSpanEventHandler.java b/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/disruptor/request/SendRequestSpanEventHandler.java
index f35f7fc5a..3899accf6 100644
--- a/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/disruptor/request/SendRequestSpanEventHandler.java
+++ b/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/disruptor/request/SendRequestSpanEventHandler.java
@@ -26,19 +26,23 @@ public class SendRequestSpanEventHandler implements EventHandler<RequestSpanHold
 
     @Override
     public void onEvent(RequestSpanHolder event, long sequence, boolean endOfBatch) throws Exception {
-        if (buffer[bufferIdx] != null) {
-            return;
-        }
+        try {
+            if (buffer[bufferIdx] != null) {
+                return;
+            }
 
-        buffer[bufferIdx] = event.getData();
-        bufferIdx++;
+            buffer[bufferIdx] = event.getData();
+            bufferIdx++;
 
-        if (bufferIdx == buffer.length) {
-            bufferIdx = 0;
-        }
+            if (bufferIdx == buffer.length) {
+                bufferIdx = 0;
+            }
 
-        if (endOfBatch) {
-            HealthCollector.getCurrentHeathReading("SendRequestSpanEventHandler").updateData(HeathReading.INFO, "Request Span messages were successful consumed .");
+            if (endOfBatch) {
+                HealthCollector.getCurrentHeathReading("SendRequestSpanEventHandler").updateData(HeathReading.INFO, "Request Span messages were successful consumed .");
+            }
+        } finally {
+            event.setData(null);
         }
     }
 
diff --git a/skywalking-storage-center/skywalking-routing/src/main/java/com/a/eye/skywalking/routing/disruptor/ack/RouteAckSpanBufferEventHandler.java b/skywalking-storage-center/skywalking-routing/src/main/java/com/a/eye/skywalking/routing/disruptor/ack/RouteAckSpanBufferEventHandler.java
index f2c532915..d8c7fc796 100644
--- a/skywalking-storage-center/skywalking-routing/src/main/java/com/a/eye/skywalking/routing/disruptor/ack/RouteAckSpanBufferEventHandler.java
+++ b/skywalking-storage-center/skywalking-routing/src/main/java/com/a/eye/skywalking/routing/disruptor/ack/RouteAckSpanBufferEventHandler.java
@@ -29,34 +29,38 @@ public class RouteAckSpanBufferEventHandler extends AbstractRouteSpanEventHandle
 
     @Override
     public void onEvent(AckSpanHolder event, long sequence, boolean endOfBatch) throws Exception {
-        buffer.add(event.getAckSpan());
+        try {
+            buffer.add(event.getAckSpan());
 
-        if (stop) {
-            try {
-                for (AckSpan ackSpan : buffer) {
-                    SpanDisruptor spanDisruptor = RoutingService.getRouter().lookup(ackSpan);
-                    spanDisruptor.saveSpan(ackSpan);
+            if (stop) {
+                try {
+                    for (AckSpan ackSpan : buffer) {
+                        SpanDisruptor spanDisruptor = RoutingService.getRouter().lookup(ackSpan);
+                        spanDisruptor.saveSpan(ackSpan);
+                    }
+                } finally {
+                    buffer.clear();
                 }
-            } finally {
-                buffer.clear();
+
+                return;
             }
 
-            return;
-        }
+            wait2Finish();
 
-        wait2Finish();
-
-        if (endOfBatch || buffer.size() == bufferSize) {
-            try {
-                SpanStorageClient spanStorageClient = getStorageClient();
-                spanStorageClient.sendACKSpan(buffer);
-                HealthCollector.getCurrentHeathReading("RouteAckSpanBufferEventHandler").updateData(HeathReading.INFO, "Batch consume %s messages successfully.", buffer.size());
-            } catch (Throwable e) {
-                logger.error("Ack messages consume failure.", e);
-                HealthCollector.getCurrentHeathReading("RouteAckSpanBufferEventHandler").updateData(HeathReading.ERROR, "Batch consume %s messages failure.", buffer.size());
-            } finally {
-                buffer.clear();
+            if (endOfBatch || buffer.size() == bufferSize) {
+                try {
+                    SpanStorageClient spanStorageClient = getStorageClient();
+                    spanStorageClient.sendACKSpan(buffer);
+                    HealthCollector.getCurrentHeathReading("RouteAckSpanBufferEventHandler").updateData(HeathReading.INFO, "Batch consume %s messages successfully.", buffer.size());
+                } catch (Throwable e) {
+                    logger.error("Ack messages consume failure.", e);
+                    HealthCollector.getCurrentHeathReading("RouteAckSpanBufferEventHandler").updateData(HeathReading.ERROR, "Batch consume %s messages failure.", buffer.size());
+                } finally {
+                    buffer.clear();
+                }
             }
+        } finally {
+            event.setAckSpan(null);
         }
     }
 }
diff --git a/skywalking-storage-center/skywalking-routing/src/main/java/com/a/eye/skywalking/routing/disruptor/request/RouteSendRequestSpanEventHandler.java b/skywalking-storage-center/skywalking-routing/src/main/java/com/a/eye/skywalking/routing/disruptor/request/RouteSendRequestSpanEventHandler.java
index 464e6ebce..7ed6cc388 100644
--- a/skywalking-storage-center/skywalking-routing/src/main/java/com/a/eye/skywalking/routing/disruptor/request/RouteSendRequestSpanEventHandler.java
+++ b/skywalking-storage-center/skywalking-routing/src/main/java/com/a/eye/skywalking/routing/disruptor/request/RouteSendRequestSpanEventHandler.java
@@ -1,6 +1,5 @@
 package com.a.eye.skywalking.routing.disruptor.request;
 
-
 import com.a.eye.skywalking.health.report.HealthCollector;
 import com.a.eye.skywalking.health.report.HeathReading;
 import com.a.eye.skywalking.logging.api.ILog;
@@ -33,34 +32,38 @@ public class RouteSendRequestSpanEventHandler extends AbstractRouteSpanEventHand
 
     @Override
     public void onEvent(RequestSpanHolder event, long sequence, boolean endOfBatch) throws Exception {
-        buffer.add(event.getRequestSpan());
+        try {
+            buffer.add(event.getRequestSpan());
 
-        if (stop) {
-            try {
-                for (RequestSpan requestSpan : buffer) {
-                    SpanDisruptor spanDisruptor = RoutingService.getRouter().lookup(requestSpan);
-                    spanDisruptor.saveSpan(requestSpan);
+            if (stop) {
+                try {
+                    for (RequestSpan requestSpan : buffer) {
+                        SpanDisruptor spanDisruptor = RoutingService.getRouter().lookup(requestSpan);
+                        spanDisruptor.saveSpan(requestSpan);
+                    }
+                } finally {
+                    buffer.clear();
                 }
-            } finally {
-                buffer.clear();
+
+                return;
             }
 
-            return;
-        }
+            wait2Finish();
 
-        wait2Finish();
-
-        if (endOfBatch || buffer.size() == bufferSize) {
-            try {
-                SpanStorageClient spanStorageClient = getStorageClient();
-                spanStorageClient.sendRequestSpan(buffer);
-                HealthCollector.getCurrentHeathReading("RouteSendRequestSpanEventHandler").updateData(HeathReading.INFO, "Batch consume %s messages successfully.", buffer.size());
-            } catch (Throwable e) {
-                logger.error("RequestSpan messages consume failure.", e);
-                HealthCollector.getCurrentHeathReading("RouteSendRequestSpanEventHandler").updateData(HeathReading.ERROR, "Batch consume %s messages failure.", buffer.size());
-            } finally {
-                buffer.clear();
+            if (endOfBatch || buffer.size() == bufferSize) {
+                try {
+                    SpanStorageClient spanStorageClient = getStorageClient();
+                    spanStorageClient.sendRequestSpan(buffer);
+                    HealthCollector.getCurrentHeathReading("RouteSendRequestSpanEventHandler").updateData(HeathReading.INFO, "Batch consume %s messages successfully.", buffer.size());
+                } catch (Throwable e) {
+                    logger.error("RequestSpan messages consume failure.", e);
+                    HealthCollector.getCurrentHeathReading("RouteSendRequestSpanEventHandler").updateData(HeathReading.ERROR, "Batch consume %s messages failure.", buffer.size());
+                } finally {
+                    buffer.clear();
+                }
             }
+        } finally {
+            event.setRequestSpan(null);
         }
     }
 }
diff --git a/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/disruptor/ack/StoreAckSpanEventHandler.java b/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/disruptor/ack/StoreAckSpanEventHandler.java
index a1496a15d..2edc3cb76 100644
--- a/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/disruptor/ack/StoreAckSpanEventHandler.java
+++ b/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/disruptor/ack/StoreAckSpanEventHandler.java
@@ -22,8 +22,8 @@ import java.util.List;
 public class StoreAckSpanEventHandler implements EventHandler<AckSpanData> {
     private static ILog logger = LogManager.getLogger(StoreAckSpanEventHandler.class);
     private DataFileWriter fileWriter;
-    private IndexOperator  operator;
-    private int            bufferSize;
+    private IndexOperator operator;
+    private int bufferSize;
     private List<SpanData> buffer;
 
     public StoreAckSpanEventHandler() {
@@ -35,20 +35,24 @@ public class StoreAckSpanEventHandler implements EventHandler<AckSpanData> {
 
     @Override
     public void onEvent(AckSpanData event, long sequence, boolean endOfBatch) throws Exception {
-        buffer.add(event);
+        try {
+            buffer.add(event);
 
-        if (endOfBatch || buffer.size() == bufferSize) {
-            try {
-                IndexMetaCollection collection = fileWriter.write(buffer);
+            if (endOfBatch || buffer.size() == bufferSize) {
+                try {
+                    IndexMetaCollection collection = fileWriter.write(buffer);
 
-                operator.batchUpdate(collection);
-                HealthCollector.getCurrentHeathReading("StoreAckSpanEventHandler").updateData(HeathReading.INFO, "Batch consume %s messages successfully.", buffer.size());
-            } catch (Throwable e) {
-                logger.error("Ack messages consume failure.", e);
-                HealthCollector.getCurrentHeathReading("StoreAckSpanEventHandler").updateData(HeathReading.ERROR, "Batch consume %s messages failure.", buffer.size());
-            } finally {
-                buffer.clear();
+                    operator.batchUpdate(collection);
+                    HealthCollector.getCurrentHeathReading("StoreAckSpanEventHandler").updateData(HeathReading.INFO, "Batch consume %s messages successfully.", buffer.size());
+                } catch (Throwable e) {
+                    logger.error("Ack messages consume failure.", e);
+                    HealthCollector.getCurrentHeathReading("StoreAckSpanEventHandler").updateData(HeathReading.ERROR, "Batch consume %s messages failure.", buffer.size());
+                } finally {
+                    buffer.clear();
+                }
             }
+        } finally {
+            event.setAckSpan(null);
         }
     }
 }
diff --git a/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/disruptor/request/StoreRequestSpanEventHandler.java b/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/disruptor/request/StoreRequestSpanEventHandler.java
index be4d69c2b..39c1e37fe 100644
--- a/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/disruptor/request/StoreRequestSpanEventHandler.java
+++ b/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/disruptor/request/StoreRequestSpanEventHandler.java
@@ -22,8 +22,8 @@ import java.util.List;
 public class StoreRequestSpanEventHandler implements EventHandler<RequestSpanData> {
     private static ILog logger = LogManager.getLogger(StoreRequestSpanEventHandler.class);
     private DataFileWriter fileWriter;
-    private IndexOperator  operator;
-    private int            bufferSize;
+    private IndexOperator operator;
+    private int bufferSize;
     private List<SpanData> buffer;
 
     public StoreRequestSpanEventHandler() {
@@ -35,21 +35,25 @@ public class StoreRequestSpanEventHandler implements EventHandler<RequestSpanDat
 
     @Override
     public void onEvent(RequestSpanData event, long sequence, boolean endOfBatch) throws Exception {
-        buffer.add(event);
+        try {
+            buffer.add(event);
 
-        if (endOfBatch || buffer.size() == bufferSize) {
-            try {
-                IndexMetaCollection collection = fileWriter.write(buffer);
+            if (endOfBatch || buffer.size() == bufferSize) {
+                try {
+                    IndexMetaCollection collection = fileWriter.write(buffer);
 
-                operator.batchUpdate(collection);
+                    operator.batchUpdate(collection);
 
-                HealthCollector.getCurrentHeathReading("StoreRequestSpanEventHandler").updateData(HeathReading.INFO, "Batch consume %s messages successfully.", buffer.size());
-            } catch (Throwable e) {
-                logger.error("Ack messages consume failure.", e);
-                HealthCollector.getCurrentHeathReading("StoreRequestSpanEventHandler").updateData(HeathReading.ERROR, "Batch consume %s messages failure.", buffer.size());
-            } finally {
-                buffer.clear();
+                    HealthCollector.getCurrentHeathReading("StoreRequestSpanEventHandler").updateData(HeathReading.INFO, "Batch consume %s messages successfully.", buffer.size());
+                } catch (Throwable e) {
+                    logger.error("Ack messages consume failure.", e);
+                    HealthCollector.getCurrentHeathReading("StoreRequestSpanEventHandler").updateData(HeathReading.ERROR, "Batch consume %s messages failure.", buffer.size());
+                } finally {
+                    buffer.clear();
+                }
             }
+        } finally {
+            event.setRequestSpan(null);
         }
     }
 }