Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/2357#discussion_r74463001
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/rpc/akka/messages/RpcInvocation.java
---
@@ -0,0 +1,98 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.rpc.akka.messages;
+
+import org.apache.flink.util.Preconditions;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+
+/**
+ * Rpc invocation message containing the remote procedure name, its
parameter types and the
+ * corresponding call arguments.
+ */
+public final class RpcInvocation implements Serializable {
+ private static final long serialVersionUID = -7058254033460536037L;
+
+ private final String methodName;
+ private final Class<?>[] parameterTypes;
--- End diff --
We should not, but it happened accidentally in the past (user exception
reporting, user state handles, user accumulators) and we always figured it out
late because it did not fail hard but only dropped the message.
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