解决：java.net.NoRouteToHostException: 没有到主机的路由

mahan

解决：java.net.NoRouteToHostException: 没有到主机的路由

在执行spark程序的jar包时，出现下面问题

2022-05-26 08:54:06,392 INFO retry.RetryInvocationHandler: java.net.NoRouteToHostException: No Route to Host from  spark1/192.168.40.30 to spark2:8032 failed on socket timeout exception: java.net.NoRouteToHostException: 没有到主机的路由; For more details see:  http://wiki.apache.org/hadoop/NoRouteToHost, while invoking ApplicationClientProtocolPBClientImpl.getClusterMetrics over null after 13 failover attempts. Trying to failover after sleeping for 38541ms.

查看： http://wiki.apache.org/hadoop/NoRouteToHost中，提示如下





可以根据上面查找问题

我出现java.net.NoRouteToHostException: 没有到主机的路由是虚拟机之间的防火墙没有关闭

systemctl stop firewalld
systemctl disable firewalld.service


查看防火墙状态

systemctl status firewalld