网站整站,微信公众号推广文案范文,滁州医院网站建设费用,长春网站设计制作培训以后都会将学习Hadoop中遇到的问题写到这里#xff0c;供自己参考#xff0c;能帮到大家更好SecondaryNameNode未启动解决办法#xff1a;可能是端口被占用#xff08;我没遇到#xff09;hadoop104未在/etc/hosts配置映射路径我在hadoop104的/etc/hosts 添加了所有hadoop…以后都会将学习Hadoop中遇到的问题写到这里供自己参考能帮到大家更好SecondaryNameNode未启动解决办法可能是端口被占用我没遇到hadoop104未在/etc/hosts配置映射路径我在hadoop104的/etc/hosts 添加了所有hadoop服务器的地址以防万一192.168.xx.xxx hadoop102 hadoop102
192.168.xx.xxx hadoop103 hadoop103
192.168.xx.xxx hadoop104 hadoop104重启hdfssbin/stop-dfs.sh #关闭hdfs
sbin/start-dfs.sh #开启hdfs运行成功SecondaryNameNode恢复以后遇到启动异常的情况可以查看hadoop3.3.0/logs这个文件夹具体大家各自是什么版本自己看浏览器打不开hadoop102:9870原因windows下的hosts为设置hadoop服务器ip解决在windows找到hostsC:\Windows\System32\drivers\etc拖到桌面打开添加语句ip地址 服务器名称放回原路径错误: 找不到或无法加载主类 org.apache.hadoop.mapreduce.v2.app.MRAppMaster原因yarn-site.xml内未配置hadoop的类路径classpath解决办法打开/hadoop3.3.0/etc/hadoop目录vim ./yarn-site.xmllinux输入以下内容查看hadoop类路径hadoop classpath将获取的路径写到yarn-site.xml内propertynameyarn.application.classpath/namevalue/opt/module/hadoop-3.3.0/etc/hadoop:/opt/module/hadoop-3.3.0/share/hadoop/common/lib/*:/opt/module/hadoop-3.3.0/share/hadoop/common/*:/opt/module/hadoop-3.3.0/share/hadoop/hdfs:/opt/module/hadoop-3.3.0/share/hadoop/hdfs/lib/*:/opt/module/hadoop-3.3.0/share/hadoop/hdfs/*:/opt/module/hadoop-3.3.0/share/hadoop/mapreduce/*:/opt/module/hadoop-3.3.0/share/hadoop/yarn/lib/*:/opt/module/hadoop-3.3.0/share/hadoop/yarn/*/value
/property保存内容重启集群#先切换到hadoop3.3.0/sbin目录
#1.先关闭集群
stop-yarn.sh
stop-dfs.sh
#2.再启动集群
start-dfs.sh
start-dfs.shok
