Hadoop解决java.net.BindException:Portinuse:hadoop103:8088

java.net.BindException: Port in use: hadoop103:8088
at org.apache.hadoop.http.HttpServer2.constructBindException(HttpServer2.java:1213)
at org.apache.hadoop.http.HttpServer2.bindForSinglePort(HttpServer2.java:1235)
at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:1294)
at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:1149)
at org.apache.hadoop.yarn.webapp.WebApps$Builder.start(WebApps.java:439)
at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.startWepApp(ResourceManager.java:1203)
at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceStart(ResourceManager.java:1312)
at org.apache.hadoop.service.AbstractService.start(AbstractService.java:194)
at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:1507)
Caused by: java.net.BindException: 无法指定被请求的地址
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 sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:351) 115,


去网上查的时候发现大部分都是netstat grep一下自己的端口号是否被占用什么的，查完之后发现并没有。

直到最近发现问题，在我的yarn-site.xml文件中配置的



yarn.resourcemanager.hostname
hadoop103



才明白，启动yarn的时候必须在你这个resoucemanager的地址才可以。由于以前懒省事，想在一台机子上直接start-all.sh。但是最近考虑到负载均衡问题，所以要手动配置一下resourcemanager和2nn的地址。而start-all.sh = （在一台机子上）start-dfs.sh + start-yarn.sh 这样很容易导致负载不均衡。使用此命令的时候也会报提示 This is deprecated。

下面粘上群起脚本hdp.sh（在~/bin/目录下创建）
我的集群规划是

#!/bin/bash
if [ $# -lt 1 ]
then
echo "No Args Input..."
exit ;
fi
case $1 in
"start")
echo " =================== 启动 hadoop集群 ==================="
#路径要是自己的路径才可以 用户名别忘了修改！
#以下都根据自己的实际路径来配置
echo " --------------- 启动 hdfs ---------------"
ssh hadoop102 "/opt/module/hadoop-3.1.3/sbin/start-dfs.sh"
echo " --------------- 启动 yarn ---------------"
ssh hadoop103 "/opt/module/hadoop-3.1.3/sbin/start-yarn.sh"
#historyserver
echo " --------------- 启动 historyserver ---------------"
ssh hadoop102 "/opt/module/hadoop-3.1.3/bin/mapred --daemon start historyserver"
;;
"stop")
echo " =================== 关闭 hadoop集群 ==================="
echo " --------------- 关闭 historyserver ---------------"
ssh hadoop102 "/opt/module/hadoop-3.1.3/bin/mapred --daemon stop historyserver"
echo " --------------- 关闭 yarn ---------------"
ssh hadoop103 "/opt/module/hadoop-3.1.3/sbin/stop-yarn.sh"
echo " --------------- 关闭 hdfs ---------------"
ssh hadoop102 "/opt/module/hadoop-3.1.3/sbin/stop-dfs.sh"
;;
*)
echo "Input Args Error..."
;;
esac