fix non-idempotent unit test (#14135)
diff --git a/dubbo-common/src/test/java/org/apache/dubbo/common/bytecode/ClassGeneratorTest.java b/dubbo-common/src/test/java/org/apache/dubbo/common/bytecode/ClassGeneratorTest.java
index 9d760b6..afaa592 100644
--- a/dubbo-common/src/test/java/org/apache/dubbo/common/bytecode/ClassGeneratorTest.java
+++ b/dubbo-common/src/test/java/org/apache/dubbo/common/bytecode/ClassGeneratorTest.java
@@ -22,6 +22,7 @@
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
+import java.util.UUID;
import java.util.concurrent.CountDownLatch;
import javassist.ClassPool;
@@ -184,7 +185,7 @@
fname.setAccessible(true);
ClassGenerator cg = ClassGenerator.newInstance();
- cg.setClassName(Bean.class.getName() + "$Builder");
+ cg.setClassName(Bean.class.getName() + "$Builder" + UUID.randomUUID().toString());
cg.addInterface(Builder.class);
cg.addField("public static java.lang.reflect.Field FNAME;");