spark standalone集群配置好后，启动sbin/start-all.sh报错，其中一个worker没有正常启动起来，查看此worker上的sparklogs目录下的 log文件，有显示如下的错误
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 WARN Utils: Service 'sparkWorker' could not bind on a random free port. You may check whether configuring an appropriate binding address.
20/04/01 02:46:08 ERROR SparkUncaughtExceptionHandler: Uncaught exception in thread Thread[main,5,main]
java.net.BindException: Cannot assign requested address: Service 'sparkWorker' failed after 16 retries (on a random free port)! Consider explicitly setting the appropriate binding address for the service 'sparkWorker' (for example spark.driver.bindAddress for SparkDriver) to the correct binding address.
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:128)
at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:558)
at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1283)
at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:501)
at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:486)
at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:989)
at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:254)
at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:364)
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:403)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463)
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138)
at java.lang.Thread.run(Thread.java:748)
从上面红色字体部分，可以判断是地址绑定错误，先检查此worker的ip地址：ifconfig，确认ip地址为：192.28.12.243
然后检查此worker的/etc/hosts 文件，发现其ip配置为：
179.28.120.243 dxhost8002
由此确定是hosts文件的ip地址配置错误，导致worker启动异常，修改hosts文件为正确的ip地址：192.28.12.243，然后重新启动spark，一切恢复正常