win7下安装hadoop2.7.3报错了?报错

hadoop-mapreduce-client-shuffle-2.7.3.jar;F:\cywin2\home\Administrator\hadoop-2.

7.3\share\hadoop\mapreduce\hadoop-mapreduce-examples-2.7.3.jar

STARTUP_MSG: build = https://git-wip-us.apache.org/repos/asf/hadoop.git -r baa

91f7c6bc9cb92be5982de4719c1c8af91ccff; compiled by 'root' on 2016-08-18T01:41Z

STARTUP_MSG: java = 1.8.0_91

************************************************************/

17/07/19 14:45:52 INFO namenode.NameNode: createNameNode []

17/07/19 14:45:53 INFO impl.MetricsConfig: loaded properties from hadoop-metrics

2.properties

17/07/19 14:45:53 INFO impl.MetricsSystemImpl: Scheduled snapshot period at 10 s

econd(s).

17/07/19 14:45:53 INFO impl.MetricsSystemImpl: NameNode metrics system started

17/07/19 14:45:53 INFO namenode.NameNode: fs.defaultFS is file:///

17/07/19 14:45:53 ERROR namenode.NameNode: Failed to start namenode.

java.lang.IllegalArgumentException: Invalid URI for NameNode address (check fs.d

efaultFS): file:/// has no authority.