Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/4569#discussion_r134485505
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/rest/messages/ErrorResponseBody.java
---
@@ -0,0 +1,47 @@
+/*
+ * 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.rest.messages;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Generic response body for communicating errors on the server.
+ */
+public final class ErrorResponseBody implements ResponseBody {
+
+ static final String FIELD_NAME_ERRORS = "errors";
+
+ @JsonProperty(FIELD_NAME_ERRORS)
+ public final List<String> errors;
--- End diff --
The list constructor isn't meant to be private. The idea is to allow us to
provide multiple error messages, which can be useful if a handler does multiple
actions in parallel and multiple fail.
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