[GitHub] spark pull request #18388: [SPARK-21175][WIP] Reject OpenBlocks when memory ...

[zsxwing <gi...@git.apache.org>]

Github user zsxwing commented on a diff in the pull request:

    https://github.com/apache/spark/pull/18388#discussion_r127131671
  
    --- Diff: common/network-common/src/main/java/org/apache/spark/network/util/PooledByteBufAllocatorWithMetrics.java ---
    @@ -0,0 +1,70 @@
    +/*
    + * 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.network.util;
    +
    +import java.util.Iterator;
    +import java.util.List;
    +
    +import io.netty.buffer.PoolArenaMetric;
    +import io.netty.buffer.PoolChunkListMetric;
    +import io.netty.buffer.PoolChunkMetric;
    +import io.netty.buffer.PooledByteBufAllocator;
    +
    +/**
    + * A {@link PooledByteBufAllocator} providing some metrics.
    + */
    +public class PooledByteBufAllocatorWithMetrics extends PooledByteBufAllocator {
    --- End diff --
    
    Instead of adding this class, can we upgrade to Netty 4.0.45.Final which allows us to use metrics APIs? (See https://github.com/netty/netty/pull/6460)


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