錯誤資訊

初看的時候還以為是端口占用：Address already in use: bind，不要被錯誤提示矇蔽了，實則是 xxl-job 的執行器註解 @Bean 配置的問題。

2020-12-29 09:24:00.494  INFO 9284,// --- [      Thread-40] com.xxl.rpc.remoting.net.Server          : >>>>>>>>>>> xxl-rpc remoting server start success, nettype = com.xxl.rpc.remoting.net.impl.netty_http.server.NettyHttpServer, port = 9991Exception in thread "Thread-44" java.net.BindException: Address already in use: bind	at sun.nio.ch.Net.bind0(Native Method)	at sun.nio.ch.Net.bind(Net.java:433)	at sun.nio.ch.Net.bind(Net.java:425)	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)	at io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:134)	at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:550)	at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1334)	at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:504)	at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:489)	at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:973)	at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:248)	at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:348)	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute$$$capture(AbstractEventExecutor.java:164)	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java)	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500)	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)	at java.lang.Thread.run(Thread.java:745)12345678910111213141516171819202122

在低版本的 xxl-job 中， 初始化 XxlJobSpringExecutor 執行器需要在 @Bean 中加上 initMethod = "start", destroyMethod = "destroy"。

但是在高版本的 xxl-job（如 2.1.2）則需要刪除 initMethod = "start", destroyMethod = "destroy"

報錯前

@Bean(initMethod = "start", destroyMethod = "destroy")public XxlJobSpringExecutor xxlJobExecutor() {    log.info(">>>>>>>>>>> xxl-job config init.");    XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor();    xxlJobSpringExecutor.setAdminAddresses(jobProperties.getAdminAddresses());    xxlJobSpringExecutor.setAppName(jobProperties.getAppName());    xxlJobSpringExecutor.setPort(jobProperties.getPort());    xxlJobSpringExecutor.setLogPath(jobProperties.getLogPath());    xxlJobSpringExecutor.setLogRetentionDays(jobProperties.getLogRetentionDays());    xxlJobSpringExecutor.setIp(jobProperties.getIp());    xxlJobSpringExecutor.setAccessToken(jobProperties.getAccessToken());    return xxlJobSpringExecutor;}12345678910111213

把 @Bean 的屬性 initMethod = "start", destroyMethod = "destroy" 刪除即可，程式碼如下：

@Beanpublic XxlJobSpringExecutor xxlJobExecutor() {    log.info(">>>>>>>>>>> xxl-job config init.");    XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor();    xxlJobSpringExecutor.setAdminAddresses(jobProperties.getAdminAddresses());    xxlJobSpringExecutor.setAppName(jobProperties.getAppName());    xxlJobSpringExecutor.setPort(jobProperties.getPort());    xxlJobSpringExecutor.setLogPath(jobProperties.getLogPath());    xxlJobSpringExecutor.setLogRetentionDays(jobProperties.getLogRetentionDays());    xxlJobSpringExecutor.setIp(jobProperties.getIp());    xxlJobSpringExecutor.setAccessToken(jobProperties.getAccessToken());    return xxlJobSpringExecutor;

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