Hive启动报错：Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: java.io.

Hive启动时报如下错误：

<span style="font-size:18px;">Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: java.io.IOException: Permission denied
	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:522)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:677)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.RuntimeException: java.io.IOException: Permission denied
	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:515)
	... 8 more
Caused by: java.io.IOException: Permission denied
	at java.io.UnixFileSystem.createFileExclusively(Native Method)
	at java.io.File.createTempFile(File.java:2024)
	at org.apache.hadoop.hive.ql.session.SessionState.createTempFile(SessionState.java:818)
	at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:513)
	... 8 more
</span>

问题分析：未开启Hadoop

解决办法：开启Hadoop

并用jps查看：

14944 SecondaryNameNode
15218 ResourceManager
15366 NodeManager
23846 SparkSubmit
14488 NameNode
14648 DataNode
39498 Jps

表示启动成功，然后再启动hive，启动成功