spark MapOutputMetadata 源码
spark MapOutputMetadata 代码
文件路径：/core/src/main/java/org/apache/spark/shuffle/api/metadata/MapOutputMetadata.java
/*
* 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.spark.shuffle.api.metadata;
import java.io.Serializable;
/**
* :: Private ::
* An opaque metadata tag for registering the result of committing the output of a
* shuffle map task.
* <p>
* All implementations must be serializable since this is sent from the executors to
* the driver.
*/
public interface MapOutputMetadata extends Serializable {}
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