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[CELEBORN-1912] ReadClientHandler should support reconnection for ChannelInboundHandler#channelInactive #3154
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82 changes: 82 additions & 0 deletions
82
common/src/main/java/org/apache/celeborn/common/network/client/ReconnectHandler.java
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Original file line number | Diff line number | Diff line change |
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/* | ||
* 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. | ||
*/ | ||
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package org.apache.celeborn.common.network.client; | ||
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import java.util.concurrent.TimeUnit; | ||
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import io.netty.bootstrap.Bootstrap; | ||
import io.netty.channel.ChannelFuture; | ||
import io.netty.channel.ChannelHandlerContext; | ||
import io.netty.channel.ChannelInboundHandlerAdapter; | ||
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import org.apache.celeborn.common.network.util.TransportConf; | ||
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public class ReconnectHandler extends ChannelInboundHandlerAdapter { | ||
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private final int maxReconnectRetries; | ||
private final int reconnectRetryWaitTimeMs; | ||
private final Bootstrap bootstrap; | ||
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private volatile boolean shouldReconnect = true; | ||
private int reconnectRetries = 0; | ||
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public ReconnectHandler(TransportConf conf, Bootstrap bootstrap) { | ||
this.maxReconnectRetries = conf.maxReconnectRetries(); | ||
this.reconnectRetryWaitTimeMs = conf.reconnectRetryWaitTimeMs(); | ||
this.bootstrap = bootstrap; | ||
} | ||
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@Override | ||
public void channelActive(ChannelHandlerContext context) throws Exception { | ||
reconnectRetries = 0; | ||
super.channelActive(context); | ||
} | ||
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@Override | ||
public void channelInactive(ChannelHandlerContext context) throws Exception { | ||
if (shouldReconnect && reconnectRetries < maxReconnectRetries) { | ||
scheduleReconnect(context); | ||
} else { | ||
super.channelInactive(context); | ||
} | ||
} | ||
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private void scheduleReconnect(ChannelHandlerContext context) { | ||
reconnectRetries++; | ||
context | ||
.channel() | ||
.eventLoop() | ||
.schedule( | ||
() -> { | ||
bootstrap | ||
.connect() | ||
.addListener( | ||
(ChannelFuture future) -> { | ||
if (!future.isSuccess()) { | ||
scheduleReconnect(context); | ||
} | ||
}); | ||
}, | ||
reconnectRetryWaitTimeMs, | ||
TimeUnit.MILLISECONDS); | ||
} | ||
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public void stopReconnect() { | ||
shouldReconnect = false; | ||
} | ||
} |
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If the connection fails, there is a risk that Netty will attempt to connect indefinitely.
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I think you should check the reconnectRetries is lesser than maxReconnectRetries in the
scheduleReconnect
method.