深圳哪些设计公司做网站比较出名门户网站建设经验总结报告
关掉虚拟机后，重新启动后，按照Hadoop和Hive的流程重新启动，发现无法启动成功，特别是元数据服务无法启动，出现以下错误:
Exception in thread “main” java.lang.RuntimeException: java.net.ConnectException: Call From hadoop-master/192.168.19.137 to hadoop-master:9000 failed on connection exception: java.net.ConnectException: Connection refused;
Caused by: java.net.ConnectException: Call From hadoop-master/192.168.19.137 to hadoop-master:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
at
重新启动Hadoop和Hive都是相同的错误，查看jps发现NameNode没有启动：
7235 RunJar
11235 NodeManager
10661 ResourceManager
10041 DataNode
10490 SecondaryNameNode
11387 Jps
需要删除core-site配置文件中hadoop.tmp.dir映射的文件目，一般在hadoop/tmp文件夹下。下面是解决步骤：
- 进入hadoop/sbin目录下，启动stop-all.sh停止所有服务
./stop-all.sh
- 删除core-site配置文件中hadoop.tmp.dir映射的文件目
rm -rf tmp
- 进入hadoop目录下，格式化NameNode
./bin/hdfs namenode -format
- 进入hadoop/sbin目录，重新启动
./start-all.sh
- 启动元数据服务
hive --service metastore&
- 启动hive
hive