hadoop - 除了namenode以外，所有其他一切都从Hadoop伪分布式开始

Question

我在Ubuntu上有Hadoop 2.9.0

/usr/local/hadoop

但是当我尝试 start-dfs.sh启动namenode时未显示任何错误
但是当我输入 jps时，只有

10900 SecondaryNameNode
11047 Jps
10696 DataNode

接缝已经开始，而不是名称节点

尝试过的事情:
=>删除了临时文件并格式化了namenode hadoop namenode -format
终奌站:

blaze@blazian:/tmp$ start-dfs.sh
Starting namenodes on [localhost]
blaze@localhost's password: 
localhost: starting namenode, logging to /usr/local/hadoop/logs/hadoop-blaze-namenode-blazian.out
blaze@localhost's password: 
localhost: starting datanode, logging to /usr/local/hadoop/logs/hadoop-blaze-datanode-blazian.out
Starting secondary namenodes [0.0.0.0]
blaze@0.0.0.0's password: 
0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop/logs/hadoop-blaze-secondarynamenode-blazian.out
blaze@blazian:/tmp$ jps
10900 SecondaryNameNode
11047 Jps
10696 DataNode

Answer 1

您没有使用localhost的SSH设置。请按照以下步骤操作，您将能够运行namenode。

进入系统终端并输入:

cd(It will redirect you to ~)

ssh-keygen(hit enter three times and it will create a .ssh directory in ~)

cat id_rsa.pub >> authorized_keys(it will make sure that your localhost is the trusted source and give permission to make passwordless ssh.)

然后只需运行 start-all.sh就可以了。