hadoop启动start-all.sh,slave节点没有datanode的问题

启动master节点:start-all.sh

如果安装没问题jsp进程后出现:

master有四个进程:Jps、NameNode、ResourceManager、SecondaryNameNode

slave节点进程有:Jps、DataNode、NodeManager

但是我们频繁的修改配置文件执行:hdfs namenode -format,在slave节点就不会出现DataNode进程,是由于/dfs/name/current文件下的VERSION中的namespaceId不一致造成的。

解决办法:

执行stop-all.sh , 将namespaceId改成与master节点一致。或者删除配置的临时文件,日志文件等文件,然后重新格式化:

hdfs namenode -format
启动hadoop:
start-all.sh
再次jps就可以看到DataNode进程!

浏览器输入:http://IP地址:50070就可以看到namenode



[bhy@master hadoop-2.8.3]$ start-dfs.sh Starting namenodes on [master] master: master: Authorized users only. All activities may be monitored and reported. master: namenode running as process 47702. Stop it first. master: master: Authorized users only. All activities may be monitored and reported. localhost: localhost: Authorized users only. All activities may be monitored and reported. slave: slave: Authorized users only. All activities may be monitored and reported. localhost: mv: 无法获取'/home/bhy/testhadoop/hadoop-2.8.3/logs/hadoop-bhy-datanode-master.out.2' 的文件状态(stat): 没有那个文件或目录 localhost: mv: 无法获取'/home/bhy/testhadoop/hadoop-2.8.3/logs/hadoop-bhy-datanode-master.out.1' 的文件状态(stat): 没有那个文件或目录 master: starting datanode, logging to /home/bhy/testhadoop/hadoop-2.8.3/logs/hadoop-bhy-datanode-master.out localhost: mv: 无法获取'/home/bhy/testhadoop/hadoop-2.8.3/logs/hadoop-bhy-datanode-master.out' 的文件状态(stat): 没有那个文件或目录 localhost: starting datanode, logging to /home/bhy/testhadoop/hadoop-2.8.3/logs/hadoop-bhy-datanode-master.out slave: datanode running as process 35714. Stop it first. master: ulimit -a for user bhy master: core file size (blocks, -c) unlimited master: data seg size (kbytes, -d) unlimited master: scheduling priority (-e) 0 master: file size (blocks, -f) unlimited master: pending signals (-i) 11396 master: max locked memory (kbytes, -l) 64 master: max memory size (kbytes, -m) unlimited master: open files (-n) 1024 master: pipe size (512 bytes, -p) 8 Starting secondary namenodes [master] master: master: Authorized users only. All activities may be monitored and reported. master: secondarynamenode running as process 48219. Stop it first.
最新发布
06-02
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