解决hive启动异常：Exception in thread "main" java.lang.RuntimeException

Exception in thread "main" java.lang.RuntimeException: The root scratch dir: hdfs://master:8020/hive/scratchdir on HDFS should be writable. Current permissions are: rwx------
        at org.apache.hadoop.hive.ql.session.SessionState.createRootHDFSDir(SessionState.java:720)
        at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:650)
        at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:582)
        at org.apache.hadoop.hive.ql.session.SessionState.beginStart(SessionState.java:549)
        at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:750)
        at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:686)
        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:498)
        at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
 

提示是访问权限的问题，按异常中的提示把HDFS上相应的文件夹删除(再次启动时会自动创建)