hadoop - 如何处理Hadoop中的java.net.ConnectException？

Question

我正在尝试使用以下脚本将一些本地文件复制到HDFS:

bin/hadoop fs -copyFromLocal '/home/czy/IdeaProjects/HadoopInAction/FirstHadoop/src/main/resources/crossView.txt' /user/czy

它是这样的:

copyFromLocal: Call From ubuntu/127.0.1.1 to localhost:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused

但是，当我使用这样的脚本(没有hdfs:// localhost /)时，它运行良好:

bin/hadoop fs -copyFromLocal '/home/czy/IdeaProjects/HadoopInAction/FirstHadoop/src/main/resources/crossView.txt' /user/czy

为什么会这样呢？将namenode端口配置为9000时为什么会收到 to localhost:8020 failed？

Answer 1

检查您的core-site.xml文件中的有效参数，服务器和端口名称

检查下面的链接..它可能有用...

https://datashine.wordpress.com/2014/09/06/java-net-connectexception-connection-refused-for-more-details-see-httpwiki-apache-orghadoopconnectionrefused/