From dev-return-78223-archive-asf-public=cust-asf.ponee.io@zookeeper.apache.org Wed Feb 6 16:12:40 2019 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id 7998F18067A for ; Wed, 6 Feb 2019 17:12:39 +0100 (CET) Received: (qmail 44974 invoked by uid 500); 6 Feb 2019 16:12:38 -0000 Mailing-List: contact dev-help@zookeeper.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@zookeeper.apache.org Delivered-To: mailing list dev@zookeeper.apache.org Received: (qmail 44960 invoked by uid 99); 6 Feb 2019 16:12:38 -0000 Received: from ec2-52-202-80-70.compute-1.amazonaws.com (HELO gitbox.apache.org) (52.202.80.70) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 06 Feb 2019 16:12:38 +0000 From: GitBox To: dev@zookeeper.apache.org Subject: [GitHub] ivmaykov commented on a change in pull request #753: ZOOKEEPER-3204: Reconfig tests are constantly failing on 3.5 after applying Java 11 fix Message-ID: <154946955730.8621.5064402139440450081.gitbox@gitbox.apache.org> Date: Wed, 06 Feb 2019 16:12:37 -0000 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit ivmaykov commented on a change in pull request #753: ZOOKEEPER-3204: Reconfig tests are constantly failing on 3.5 after applying Java 11 fix URL: https://github.com/apache/zookeeper/pull/753#discussion_r254337773 ########## File path: zookeeper-server/src/main/java/org/apache/zookeeper/common/NettyUtils.java ########## @@ -0,0 +1,76 @@ +/** + * 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.zookeeper.common; + +import io.netty.channel.EventLoopGroup; +import io.netty.channel.epoll.Epoll; +import io.netty.channel.epoll.EpollEventLoopGroup; +import io.netty.channel.epoll.EpollServerSocketChannel; +import io.netty.channel.epoll.EpollSocketChannel; +import io.netty.channel.nio.NioEventLoopGroup; +import io.netty.channel.socket.ServerSocketChannel; +import io.netty.channel.socket.SocketChannel; +import io.netty.channel.socket.nio.NioServerSocketChannel; +import io.netty.channel.socket.nio.NioSocketChannel; + +/** + * Helper methods for netty code. + */ +public class NettyUtils { + /** + * If {@link Epoll#isAvailable()} == true, returns a new + * {@link EpollEventLoopGroup}, otherwise returns a new + * {@link NioEventLoopGroup}. + * @return a new {@link EventLoopGroup}. + */ + public static EventLoopGroup newNioOrEpollEventLoopGroup() { + if (Epoll.isAvailable()) { + return new EpollEventLoopGroup(); Review comment: For clients it's not a huge deal because there is typically 1 client per process. So it will use 32 threads (for example) instead of 1, but that's typically per machine - not a huge deal. On server side, there is one boss group per server so again, we are only wasting 31 (or maybe 63, or 127 ... depending on number of cores) threads per machine - will not crash anything. I will fix it, but I don't think it's a blocking issue. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: users@infra.apache.org With regards, Apache Git Services