After Hive starts, the following exception occurs
hive> in metadata:metaexception (Message:got exception:java.net.ConnectException centos7-/192.168. 146.135:9000return1 from Org.apache.hadoop.hive.ql.exec.DDLTask
The reason is that the Hadoop cluster does not start (note port number 9000)
[[Email protected] onconf]# start-all.sh //start Hadoopstarting Namenode, logging to/opt/sw/hadoop-0.20.2/bin/. /logs/hadoop-root-namenode-centos7- on. outCentos7-Geneva: Starting Datanode, logging to/opt/sw/hadoop-0.20.2/bin/. /logs/hadoop-root-datanode-centos7-Geneva. outCentos7- Geneva: Starting Datanode, logging to/opt/sw/hadoop-0.20.2/bin/. /logs/hadoop-root-datanode-centos7- Geneva. outCentos7- on: Starting Secondarynamenode, logging to/opt/sw/hadoop-0.20.2/bin/. /logs/hadoop-root-secondarynamenode-centos7- on. outstarting Jobtracker, logging to/opt/sw/hadoop-0.20.2/bin/. /logs/hadoop-root-jobtracker-centos7- on. outCentos7-Geneva: Starting Tasktracker, logging to/opt/sw/hadoop-0.20.2/bin/. /logs/hadoop-root-tasktracker-centos7-Geneva. outCentos7- Geneva: Starting Tasktracker, logging to/opt/sw/hadoop-0.20.2/bin/. /logs/hadoop-root-tasktracker-centos7- Geneva. out[[Email protected]- onconf]# JPS2608NameNode2753Secondarynamenode2818Jobtracker2904Jps2475Runjar
There's no problem.
Hive> show Databases;okdefault1.104 seconds
Failed:execution Error, return code 1 from Org.apache.hadoop.hive.ql.exec.DDLTask