Fix bug stop stopSpan when not createSpan in Spring Callback (#1572)

* Fix bug stop stopSpan when not createSpan

apm-sniffer/apm-sdk-plugin/spring-plugins/concurrent-util-4.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/spring/concurrent/FailureCallbackInterceptor.java

@@ -51,12 +51,20 @@ public class FailureCallbackInterceptor implements InstanceMethodsAroundIntercep
     @Override
     public Object afterMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes,
         Object ret) throws Throwable {
+        Object[] cacheValues = (Object[])objInst.getSkyWalkingDynamicField();
+        if (cacheValues == null) {
+            return ret;
+        }
         ContextManager.stopSpan();
         return ret;
     }
 
     @Override public void handleMethodException(EnhancedInstance objInst, Method method, Object[] allArguments,
         Class<?>[] argumentsTypes, Throwable t) {
+        Object[] cacheValues = (Object[])objInst.getSkyWalkingDynamicField();
+        if (cacheValues == null) {
+            return;
+        }
         ContextManager.activeSpan().errorOccurred().log(t);
     }
 }

apm-sniffer/apm-sdk-plugin/spring-plugins/concurrent-util-4.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/spring/concurrent/SuccessCallbackInterceptor.java

@@ -51,12 +51,20 @@ public class SuccessCallbackInterceptor implements InstanceMethodsAroundIntercep
     @Override
     public Object afterMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes,
         Object ret) throws Throwable {
+        Object[] cacheValues = (Object[])objInst.getSkyWalkingDynamicField();
+        if (cacheValues == null) {
+            return ret;
+        }
         ContextManager.stopSpan();
         return ret;
     }
 
     @Override public void handleMethodException(EnhancedInstance objInst, Method method, Object[] allArguments,
         Class<?>[] argumentsTypes, Throwable t) {
+        Object[] cacheValues = (Object[])objInst.getSkyWalkingDynamicField();
+        if (cacheValues == null) {
+            return;
+        }
         ContextManager.activeSpan().errorOccurred().log(t);
     }
 }