diff --git a/src/main/java/com/loafle/overflow/Server.java b/src/main/java/com/loafle/overflow/Server.java
index 516a101..2d9146d 100644
--- a/src/main/java/com/loafle/overflow/Server.java
+++ b/src/main/java/com/loafle/overflow/Server.java
@@ -143,10 +143,12 @@ public class Server {
             Object obj = null;
             for (Init in : list) {
                 Crawler crawler = crawlerMap.get(in.getName().name());
-                try {
-                    obj =  crawler.init(in.getData().toByteArray());
-                } catch (Exception e) {
-                    e.printStackTrace();
+                if (crawler != null) {
+                    try {
+                        obj =  crawler.init(in.getData().toByteArray());
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    }
                 }
             }
 
diff --git a/src/test/java/com/loafle/overflow/ServerTest.java b/src/test/java/com/loafle/overflow/ServerTest.java
index cb3c513..8fa5806 100644
--- a/src/test/java/com/loafle/overflow/ServerTest.java
+++ b/src/test/java/com/loafle/overflow/ServerTest.java
@@ -1,5 +1,8 @@
 package com.loafle.overflow;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.protobuf.ByteString;
 import com.loafle.overflow.crawler.Crawler;
 import com.loafle.overflow.crawler.config.Config;
 import com.loafle.overflow.rpc.*;
@@ -11,6 +14,9 @@ import org.junit.Before;
 import org.junit.Test;
 
 import java.io.*;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.logging.Logger;
 
 import static org.junit.Assert.assertEquals;
@@ -54,14 +60,16 @@ public class ServerTest {
         return ManagedChannelBuilder.forAddress(ip,port).usePlaintext(true).build();
     }
 
-    public Output init() {
+    public Output init() throws IOException {
         ConfigGrpc.ConfigBlockingStub client = newConfigClient("localhost",50052);
 
         ClassLoader classLoader = getClass().getClassLoader();
+        Path path = Paths.get(classLoader.getResource("config/example.json").getFile());
+        byte[] data = Files.readAllBytes(path);
+        ByteString sss = ByteString.copyFrom(data);
 
-        // path is test resources/config/example.json
         Init input = Init.newBuilder().
-                setPath(classLoader.getResource("config").getFile()).
+                setData(sss).
                 setName(Crawlers.REDIS).build();
         InputArray arr = InputArray.newBuilder().addIn(input).build();
 
@@ -89,13 +97,15 @@ public class ServerTest {
 
         ConfigGrpc.ConfigBlockingStub client = newConfigClient("localhost",50052);
 
-        ClassLoader classLoader = getClass().getClassLoader();
-
         // path is test resources/config/example.json
-        Input input = Input.newBuilder().
-                setId("example.json").
-                setName(Crawlers.REDIS).build();
+        ClassLoader classLoader = getClass().getClassLoader();
+        Path path = Paths.get(classLoader.getResource("config/example.json").getFile());
+        byte[] data = Files.readAllBytes(path);
+        ByteString sss = ByteString.copyFrom(data);
 
+        InputAdd input = InputAdd.newBuilder().
+                setData(sss).
+                setName(Crawlers.REDIS).build();
 
         Output out = client.add(input);
 
@@ -141,7 +151,7 @@ public class ServerTest {
 
         DataGrpc.DataBlockingStub client = newDataClient("localhost",50052);
         Input input = Input.newBuilder().
-                setId("example.json").
+                setId("SOEJWEOJWOEJOSDJFOASDJFOSDFO2903870928734").
                 setName(Crawlers.REDIS).build();
 
         Output out = client.get(input);
diff --git a/src/test/java/com/loafle/overflow/TestClient.java b/src/test/java/com/loafle/overflow/TestClient.java
index 2f2d594..c255bc7 100644
--- a/src/test/java/com/loafle/overflow/TestClient.java
+++ b/src/test/java/com/loafle/overflow/TestClient.java
@@ -35,7 +35,7 @@ public class TestClient {
 
     /** Say hello to server. */
     public void add() {
-        Input request = Input.newBuilder().setId("test111").setName(Crawlers.SNMP).build();
+        InputAdd request = InputAdd.newBuilder().setData(null).setName(Crawlers.SNMP).build();
         Output response;
         try {
             response = configStub.add(request);