Hbase学习6_<hostname>:9000 failed on connection exception: java.net.ConnectException: 拒绝连接
来源:互联网 发布:sql怎删查改 编辑:程序博客网 时间:2024/04/29 19:07
1.首先确保Hadoop相应进程是否开启,通过jps查看是否有namenode进程
2.然后通过netstat -nltp|grep 9000查看9000端口是否处于监听状态
3.接着通过telnet 远程的主机名 9000查看是否连接成功,如果提示Connection refused则进行第4步
4.通过sudo service iptables status查看防火墙是否开启,如果开启则通过sudo service iptables stop(此命令立即生效,但机器重启后又会恢复,如果想永久关闭(开启)防火墙,可以通过sudo chkconfig iptables off(on)命令),将其关闭(大部分是由于开启了防火墙导致的)
通过上面的步骤能够百分之八十解决该问题
备注:
本次遇到这个问题,原因是更改了Hbase的配置信息,将Master节点变换了,但是没有变换Hadoop的Master节点,所以遇到了问题2。
fs.defaultFS中配置的9000端口在NameNode节点上。
原文来自:http://blog.csdn.net/u014686180/article/details/51762505
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