zentol commented on a change in pull request #16601:
URL: https://github.com/apache/flink/pull/16601#discussion_r677184518
##########
File path:
flink-runtime/src/test/java/org/apache/flink/runtime/rpc/TestingRpcService.java
##########
@@ -51,7 +52,11 @@
* verify(testGateway, timeout(1000)).theTestMethod(any(UUID.class),
anyString());
* }</pre>
*/
-public class TestingRpcService extends AkkaRpcService {
+public class TestingRpcService implements RpcService {
+
+ // load RpcSystem only once to save initialization costs
Review comment:
```suggestion
// load RpcSystem once to save initialization costs
```
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