diff --git a/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/httpserver/AbstractGet.java b/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/httpserver/AbstractGet.java
index b7bb77a9d..0c2c0c3a2 100644
--- a/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/httpserver/AbstractGet.java
+++ b/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/httpserver/AbstractGet.java
@@ -26,6 +26,7 @@ public abstract class AbstractGet extends AbstractLocalSyncWorker {
         } catch (Exception e) {
             ((JsonObject)response).addProperty("isSuccess", false);
             ((JsonObject)response).addProperty("reason", e.getMessage());
+            logger().error(e);
         }
     }
 
diff --git a/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/segment/persistence/SegmentTopSearchWithTimeSlice.java b/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/segment/persistence/SegmentTopSearchWithTimeSlice.java
index 14eb9fcf4..0dbdde6de 100644
--- a/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/segment/persistence/SegmentTopSearchWithTimeSlice.java
+++ b/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/segment/persistence/SegmentTopSearchWithTimeSlice.java
@@ -1,6 +1,11 @@
 package com.a.eye.skywalking.collector.worker.segment.persistence;
 
-import com.a.eye.skywalking.collector.actor.*;
+import com.a.eye.skywalking.collector.actor.AbstractLocalSyncWorker;
+import com.a.eye.skywalking.collector.actor.AbstractLocalSyncWorkerProvider;
+import com.a.eye.skywalking.collector.actor.ClusterWorkerContext;
+import com.a.eye.skywalking.collector.actor.LocalWorkerContext;
+import com.a.eye.skywalking.collector.actor.ProviderNotFoundException;
+import com.a.eye.skywalking.collector.actor.Role;
 import com.a.eye.skywalking.collector.actor.selector.RollingSelector;
 import com.a.eye.skywalking.collector.actor.selector.WorkerSelector;
 import com.a.eye.skywalking.collector.worker.segment.SegmentCostIndex;
@@ -13,6 +18,7 @@ import com.a.eye.skywalking.collector.worker.storage.EsClient;
 import com.a.eye.skywalking.collector.worker.tools.CollectionTools;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
+import java.util.List;
 import org.elasticsearch.action.search.SearchRequestBuilder;
 import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.action.search.SearchType;
@@ -22,15 +28,13 @@ import org.elasticsearch.index.query.RangeQueryBuilder;
 import org.elasticsearch.search.SearchHit;
 import org.elasticsearch.search.sort.SortOrder;
 
-import java.util.List;
-
 /**
  * @author pengys5
  */
 public class SegmentTopSearchWithTimeSlice extends AbstractLocalSyncWorker {
 
     private SegmentTopSearchWithTimeSlice(Role role, ClusterWorkerContext clusterContext,
-                                          LocalWorkerContext selfContext) {
+        LocalWorkerContext selfContext) {
         super(role, clusterContext, selfContext);
     }
 
@@ -42,7 +46,7 @@ public class SegmentTopSearchWithTimeSlice extends AbstractLocalSyncWorker {
     @Override
     protected void onWork(Object request, Object response) throws Exception {
         if (request instanceof RequestEntity) {
-            RequestEntity search = (RequestEntity) request;
+            RequestEntity search = (RequestEntity)request;
 
             SearchRequestBuilder searchRequestBuilder = EsClient.INSTANCE.getClient().prepareSearch(SegmentCostIndex.INDEX);
             searchRequestBuilder.setTypes(SegmentCostIndex.TYPE_RECORD);
@@ -77,17 +81,18 @@ public class SegmentTopSearchWithTimeSlice extends AbstractLocalSyncWorker {
             for (SearchHit searchHit : searchResponse.getHits().getHits()) {
                 JsonObject topSegmentJson = new JsonObject();
                 topSegmentJson.addProperty("num", num);
-                String segId = (String) searchHit.getSource().get(SegmentCostIndex.SEG_ID);
+                String segId = (String)searchHit.getSource().get(SegmentCostIndex.SEG_ID);
                 topSegmentJson.addProperty(SegmentCostIndex.SEG_ID, segId);
-                topSegmentJson.addProperty(SegmentCostIndex.START_TIME, (Number) searchHit.getSource().get(SegmentCostIndex.START_TIME));
+                topSegmentJson.addProperty(SegmentCostIndex.START_TIME, (Number)searchHit.getSource().get(SegmentCostIndex.START_TIME));
                 if (searchHit.getSource().containsKey(SegmentCostIndex.END_TIME)) {
-                    topSegmentJson.addProperty(SegmentCostIndex.END_TIME, (Number) searchHit.getSource().get(SegmentCostIndex.END_TIME));
+                    topSegmentJson.addProperty(SegmentCostIndex.END_TIME, (Number)searchHit.getSource().get(SegmentCostIndex.END_TIME));
                 }
 
-                topSegmentJson.addProperty(SegmentCostIndex.OPERATION_NAME, (String) searchHit.getSource().get(SegmentCostIndex.OPERATION_NAME));
-                topSegmentJson.addProperty(SegmentCostIndex.COST, (Number) searchHit.getSource().get(SegmentCostIndex.COST));
+                topSegmentJson.addProperty(SegmentCostIndex.OPERATION_NAME, (String)searchHit.getSource().get(SegmentCostIndex.OPERATION_NAME));
+                topSegmentJson.addProperty(SegmentCostIndex.COST, (Number)searchHit.getSource().get(SegmentCostIndex.COST));
 
                 String segmentSource = EsClient.INSTANCE.getClient().prepareGet(SegmentIndex.INDEX, SegmentIndex.TYPE_RECORD, segId).get().getSourceAsString();
+                logger().debug("segmentSource:" + segmentSource);
                 Segment segment = SegmentDeserialize.INSTANCE.deserializeSingle(segmentSource);
                 List<GlobalTraceId> distributedTraceIdList = segment.getRelatedGlobalTraces();
 
@@ -114,7 +119,7 @@ public class SegmentTopSearchWithTimeSlice extends AbstractLocalSyncWorker {
                 topSegArray.add(topSegmentJson);
             }
 
-            JsonObject resJsonObj = (JsonObject) response;
+            JsonObject resJsonObj = (JsonObject)response;
             resJsonObj.add("result", topSegPaging);
         }
     }
diff --git a/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/span/persistence/SpanSearchWithId.java b/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/span/persistence/SpanSearchWithId.java
index fe753148e..6e981c686 100644
--- a/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/span/persistence/SpanSearchWithId.java
+++ b/skywalking-collector/skywalking-collector-worker/src/main/java/com/a/eye/skywalking/collector/worker/span/persistence/SpanSearchWithId.java
@@ -39,6 +39,7 @@ public class SpanSearchWithId extends AbstractLocalSyncWorker {
 
             for (Span span : spanList) {
                 if (String.valueOf(span.getSpanId()).equals(search.spanId)) {
+                    span.setJsonStr("");
                     String spanJsonStr = gson.toJson(span);
                     dataJson = gson.fromJson(spanJsonStr, JsonObject.class);
                 }
diff --git a/skywalking-collector/skywalking-collector-worker/src/main/resources/log4j2.xml b/skywalking-collector/skywalking-collector-worker/src/main/resources/log4j2.xml
index d139c48ed..b2a7cc07b 100644
--- a/skywalking-collector/skywalking-collector-worker/src/main/resources/log4j2.xml
+++ b/skywalking-collector/skywalking-collector-worker/src/main/resources/log4j2.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<Configuration status="DEBUG">
+<Configuration>
     <Properties>
         <Property name="log-path">../logs</Property>
     </Properties>
@@ -15,12 +15,17 @@
             <DefaultRolloverStrategy max="30"/>
         </RollingFile>
     </Appenders>
+    <Appenders>
+        <Console name="Console" target="SYSTEM_OUT">
+            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
+        </Console>
+    </Appenders>
     <Loggers>
         <logger name="com.a.eye.skywalking.collector" level="debug">
-            <AppenderRef ref="RollingFile"/>
+            <AppenderRef ref="Console"/>
         </logger>
         <Root level="INFO">
-            <AppenderRef ref="RollingFile"/>
+            <AppenderRef ref="Console"/>
         </Root>
     </Loggers>
 </Configuration>
diff --git a/skywalking-collector/skywalking-collector-worker/src/test/resources/log4j2.xml b/skywalking-collector/skywalking-collector-worker/src/test/resources/log4j2.xml
new file mode 100644
index 000000000..05d825327
--- /dev/null
+++ b/skywalking-collector/skywalking-collector-worker/src/test/resources/log4j2.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration>
+    <Properties>
+        <Property name="log-path">../logs</Property>
+    </Properties>
+    <Appenders>
+        <RollingFile name="RollingFile" fileName="${log-path}/skywalking-server-log4j2.log"
+                     filePattern="${log-path}/skywalking-server-log4j2-%d{yyyy-MM-dd}-%i.log">
+            <PatternLayout>
+                <pattern>%d - %c -%-4r [%t] %-5p %x - %m%n</pattern>
+            </PatternLayout>
+            <Policies>
+                <SizeBasedTriggeringPolicy size="102400KB"/>
+            </Policies>
+            <DefaultRolloverStrategy max="30"/>
+        </RollingFile>
+    </Appenders>
+    <Appenders>
+        <Console name="Console" target="SYSTEM_OUT">
+            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+        <logger name="com.a.eye.skywalking.collector" level="ERROR">
+            <AppenderRef ref="RollingFile"/>
+        </logger>
+        <Root level="ERROR">
+            <AppenderRef ref="RollingFile"/>
+        </Root>
+    </Loggers>
+</Configuration>