fix apache#6728, potential NPE in generic filter (apache#6785)

bouxin · Oct 5, 2020 · eed216b · eed216b
1 parent 0a14ffc
commit eed216b
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/filter/GenericFilter.java b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/filter/GenericFilter.java
@@ -71,8 +71,13 @@ public Result invoke(Invoker<?> invoker, Invocation inv) throws RpcException {
                     args = new Object[params.length];
                 }
 
+                if(types == null) {
+                    types = new String[params.length];
+                }
+
                 if (args.length != types.length) {
-                    throw new RpcException("args.length != types.length");
+                    throw new RpcException("GenericFilter#invoke args.length != types.length, please check your "
+                            + "params");
                 }
                 String generic = inv.getAttachment(GENERIC_KEY);