diff --git a/skywalking-collector/pom.xml b/skywalking-collector/pom.xml
index bf65dec4b..8e09f8cd1 100644
--- a/skywalking-collector/pom.xml
+++ b/skywalking-collector/pom.xml
@@ -30,6 +30,12 @@
             <groupId>com.typesafe.akka</groupId>
             <artifactId>akka-slf4j_2.11</artifactId>
             <version>${akka.version}</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-api</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
@@ -45,6 +51,7 @@
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-slf4j-impl</artifactId>
             <version>${log4j.version}</version>
+            <scope>runtime</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
diff --git a/skywalking-collector/skywalking-collector-cluster/src/test/java/com/a/eye/skywalking/collector/actor/AbstractClusterWorkerTestCase.java b/skywalking-collector/skywalking-collector-cluster/src/test/java/com/a/eye/skywalking/collector/actor/AbstractClusterWorkerTestCase.java
index 96c2de6ea..20d84eb72 100644
--- a/skywalking-collector/skywalking-collector-cluster/src/test/java/com/a/eye/skywalking/collector/actor/AbstractClusterWorkerTestCase.java
+++ b/skywalking-collector/skywalking-collector-cluster/src/test/java/com/a/eye/skywalking/collector/actor/AbstractClusterWorkerTestCase.java
@@ -10,6 +10,7 @@ import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.powermock.api.mockito.PowerMockito;
+import org.powermock.core.classloader.annotations.PowerMockIgnore;
 import org.powermock.core.classloader.annotations.PrepareForTest;
 import org.powermock.modules.junit4.PowerMockRunner;
 import org.powermock.reflect.Whitebox;
@@ -24,6 +25,7 @@ import static org.mockito.Mockito.when;
  */
 @RunWith(PowerMockRunner.class)
 @PrepareForTest({ClusterEvent.MemberUp.class, Address.class})
+@PowerMockIgnore({"javax.management.*"})
 public class AbstractClusterWorkerTestCase {
 
     private AbstractClusterWorker.WorkerWithAkka workerWithAkka = mock(AbstractClusterWorker.WorkerWithAkka.class, CALLS_REAL_METHODS);
diff --git a/skywalking-collector/skywalking-collector-cluster/src/test/java/com/a/eye/skywalking/collector/actor/AbstractWorkerProviderTestCase.java b/skywalking-collector/skywalking-collector-cluster/src/test/java/com/a/eye/skywalking/collector/actor/AbstractWorkerProviderTestCase.java
index 5ff6ca51f..eeb974f70 100644
--- a/skywalking-collector/skywalking-collector-cluster/src/test/java/com/a/eye/skywalking/collector/actor/AbstractWorkerProviderTestCase.java
+++ b/skywalking-collector/skywalking-collector-cluster/src/test/java/com/a/eye/skywalking/collector/actor/AbstractWorkerProviderTestCase.java
@@ -6,6 +6,7 @@ import org.junit.runner.RunWith;
 import static org.powermock.api.mockito.PowerMockito.*;
 
 import org.mockito.Mockito;
+import org.powermock.core.classloader.annotations.PowerMockIgnore;
 import org.powermock.core.classloader.annotations.PrepareForTest;
 import org.powermock.modules.junit4.PowerMockRunner;
 
@@ -14,6 +15,7 @@ import org.powermock.modules.junit4.PowerMockRunner;
  */
 @RunWith(PowerMockRunner.class)
 @PrepareForTest({AbstractWorker.class})
+@PowerMockIgnore({"javax.management.*"})
 public class AbstractWorkerProviderTestCase {
 
     @Test(expected = IllegalArgumentException.class)
diff --git a/skywalking-collector/skywalking-collector-cluster/src/test/resources/log4j2.xml b/skywalking-collector/skywalking-collector-cluster/src/test/resources/log4j2.xml
index e6e23fe93..cc2fe771e 100644
--- a/skywalking-collector/skywalking-collector-cluster/src/test/resources/log4j2.xml
+++ b/skywalking-collector/skywalking-collector-cluster/src/test/resources/log4j2.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<Configuration status="debug">
+<Configuration status="error">
     <Appenders>
         <Console name="Console" target="SYSTEM_OUT">
             <PatternLayout charset="UTF-8" pattern="[%d{yyyy-MM-dd HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
diff --git a/skywalking-collector/skywalking-collector-worker/pom.xml b/skywalking-collector/skywalking-collector-worker/pom.xml
index fdae9454e..200d37d01 100644
--- a/skywalking-collector/skywalking-collector-worker/pom.xml
+++ b/skywalking-collector/skywalking-collector-worker/pom.xml
@@ -51,11 +51,6 @@
             <version>${project.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.jetbrains</groupId>
-            <artifactId>annotations</artifactId>
-            <version>RELEASE</version>
-        </dependency>
     </dependencies>
 
     <build>
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..0e2c12e8b 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 status="error">
     <Properties>
         <Property name="log-path">../logs</Property>
     </Properties>
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..070276a29
--- /dev/null
+++ b/skywalking-collector/skywalking-collector-worker/src/test/resources/log4j2.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="error">
+    <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>
+    <Loggers>
+        <logger name="com.a.eye.skywalking.collector" level="ERROR">
+            <AppenderRef ref="RollingFile"/>
+        </logger>
+        <Root level="ERROR">
+            <AppenderRef ref="RollingFile"/>
+        </Root>
+    </Loggers>
+</Configuration>