diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 673d691..03f2166 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -7,33 +7,17 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [7, 8, 9, 10, 11 ]
+        java: [7, 8, 11, 17 ]
     steps:
       - uses: actions/checkout@v2
-      - name: Setup java
-        uses: actions/setup-java@v1
-        with:
-          java-version: ${{ matrix.java }} 
-      - name: Build with Maven
-        run: |
-          mvn clean package -DskipTests
-          mvn test
-
-  build_jdk_ge_12:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        java: [12, 13, 14, 15]
-    steps:
-      - uses: actions/checkout@v2
-      - name: Set up JDK 1.8
+      - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
-          java-version: 8
-      - name: save java8 home
+          java-version: 11
+      - name: save java11 home
         run: |
-          export JAVA8_HOME=$JAVA_HOME && echo $JAVA8_HOME
-          echo "export JAVA8_HOME=$JAVA_HOME" > ~/.testenv
+          export JAVA11_HOME=$JAVA_HOME && echo $JAVA11_HOME
+          echo "export JAVA11_HOME=$JAVA_HOME" > ~/.testenv
 
       - name: Setup java
         uses: actions/setup-java@v1
@@ -42,5 +26,5 @@ jobs:
       - name: Build with Maven
         run: |
           source ~/.testenv 
-          mvn -Dmaven.compiler.fork=true -Dmaven.compiler.executable=$JAVA8_HOME/bin/javac clean package -DskipTests
-          mvn -Dmaven.compiler.fork=true -Dmaven.compiler.executable=$JAVA8_HOME/bin/javac test
\ No newline at end of file
+          mvn -Dmaven.compiler.fork=true -Dmaven.compiler.executable=$JAVA11_HOME/bin/javac clean package -DskipTests --batch-mode
+          mvn -Dmaven.compiler.fork=true -Dmaven.compiler.executable=$JAVA11_HOME/bin/javac test --batch-mode
\ No newline at end of file
diff --git a/fastjson-demo-plugin/pom.xml b/fastjson-demo-plugin/pom.xml
index bc21a1a..62f9e48 100644
--- a/fastjson-demo-plugin/pom.xml
+++ b/fastjson-demo-plugin/pom.xml
@@ -23,7 +23,7 @@
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
-            <version>1.2.76</version>
+            <version>1.2.83</version>
         </dependency>
 
     </dependencies>
diff --git a/one-java-agent-plugin/src/main/java/com/alibaba/oneagent/plugin/PluginManagerImpl.java b/one-java-agent-plugin/src/main/java/com/alibaba/oneagent/plugin/PluginManagerImpl.java
index 0261eaa..e2b85e2 100644
--- a/one-java-agent-plugin/src/main/java/com/alibaba/oneagent/plugin/PluginManagerImpl.java
+++ b/one-java-agent-plugin/src/main/java/com/alibaba/oneagent/plugin/PluginManagerImpl.java
@@ -275,6 +275,7 @@ public void run() {
                         }
                     }
                 }, "oneagent plugin " + plugin.name() + " init");
+                thread.setDaemon(true);
                 thread.start();
             }
 
@@ -340,6 +341,7 @@ public void run() {
                         }
                     }
                 }, "oneagent plugin " + plugin.name() + " start");
+                thread.setDaemon(true);
                 thread.start();
             }
 
diff --git a/one-java-agent/src/main/java/com/alibaba/oneagent/BootstrapAgent.java b/one-java-agent/src/main/java/com/alibaba/oneagent/BootstrapAgent.java
index 5127466..e2c10ed 100644
--- a/one-java-agent/src/main/java/com/alibaba/oneagent/BootstrapAgent.java
+++ b/one-java-agent/src/main/java/com/alibaba/oneagent/BootstrapAgent.java
@@ -1,5 +1,7 @@
 package com.alibaba.oneagent;
 
+import com.alibaba.oneagent.inst.InstrumentationWrapper;
+
 import java.lang.instrument.Instrumentation;
 
 /**
@@ -28,6 +30,7 @@ public static void destroy() {
     }
 
     private static synchronized void main(String args, Instrumentation inst, boolean premain) {
+        inst = InstrumentationWrapper.newInstrumentationWrapper(inst);
         if (NopAgent.INSTANCE == AGENT) {
             Agent agent = new AgentImpl();
             agent.init(args, inst, premain);
diff --git a/one-java-agent/src/main/java/com/alibaba/oneagent/inst/InstrumentationInvocationHandler.java b/one-java-agent/src/main/java/com/alibaba/oneagent/inst/InstrumentationInvocationHandler.java
new file mode 100644
index 0000000..a3e4e21
--- /dev/null
+++ b/one-java-agent/src/main/java/com/alibaba/oneagent/inst/InstrumentationInvocationHandler.java
@@ -0,0 +1,28 @@
+package com.alibaba.oneagent.inst;
+
+import java.lang.instrument.Instrumentation;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+
+public class InstrumentationInvocationHandler implements InvocationHandler {
+    private final Instrumentation instrumentation;
+
+    private final Object lockForAppend = new Object();
+
+    public InstrumentationInvocationHandler(Instrumentation instrumentation) {
+        this.instrumentation = instrumentation;
+    }
+
+    @Override
+    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+        if (method.getName().equals("appendToBootstrapClassLoaderSearch") ||
+                method.getName().equals("appendToSystemClassLoaderSearch")
+        ) {
+            synchronized (lockForAppend) {
+                return method.invoke(instrumentation, args);
+            }
+        } else {
+            return method.invoke(instrumentation, args);
+        }
+    }
+}
diff --git a/one-java-agent/src/main/java/com/alibaba/oneagent/inst/InstrumentationWrapper.java b/one-java-agent/src/main/java/com/alibaba/oneagent/inst/InstrumentationWrapper.java
new file mode 100644
index 0000000..66cd513
--- /dev/null
+++ b/one-java-agent/src/main/java/com/alibaba/oneagent/inst/InstrumentationWrapper.java
@@ -0,0 +1,13 @@
+package com.alibaba.oneagent.inst;
+
+import java.lang.instrument.Instrumentation;
+import java.lang.reflect.Proxy;
+
+public class InstrumentationWrapper {
+    public static Instrumentation newInstrumentationWrapper(Instrumentation instrumentation) {
+        return (Instrumentation) Proxy.newProxyInstance(
+                instrumentation.getClass().getClassLoader(),
+                new Class[]{Instrumentation.class},
+                new InstrumentationInvocationHandler(instrumentation));
+    }
+}