当我使用start-all.cmd时，则datanode，resourcemanager，nodemanager正常工作，但namenode不工作！

19/11/04 22:09:14 WARN namenode.Fsnamesystem: Encountered exception loading fsimage
java.io.IOException: NameNode is not formatted.
        at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:220)
        at org.apache.hadoop.hdfs.server.namenode.Fsnamesystem.loadFSImage(Fsnamesystem.java:1012)
        at org.apache.hadoop.hdfs.server.namenode.Fsnamesystem.loadFromDisk(Fsnamesystem.java:691)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:634)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:695)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:898)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:877)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1603)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1671)
19/11/04 22:09:14 INFO mortbay.log: Stopped HttpServer2$SelectChannelConnectorWithSafeStartup@0.0.0.0:50070
19/11/04 22:09:14 INFO impl.MetricsSystemImpl: Stopping NameNode metrics system...
19/11/04 22:09:14 INFO impl.MetricsSystemImpl: NameNode metrics system stopped.
19/11/04 22:09:14 INFO impl.MetricsSystemImpl: NameNode metrics system shutdown complete.
19/11/04 22:09:14 ERROR namenode.NameNode: Failed to start namenode.
java.io.IOException: NameNode is not formatted.
        at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:220)
        at org.apache.hadoop.hdfs.server.namenode.Fsnamesystem.loadFSImage(Fsnamesystem.java:1012)
        at org.apache.hadoop.hdfs.server.namenode.Fsnamesystem.loadFromDisk(Fsnamesystem.java:691)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:634)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:695)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:898)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:877)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1603)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1671)
19/11/04 22:09:14 INFO util.ExitUtil: Exiting with status 1
19/11/04 22:09:14 INFO namenode.NameNode: SHUTDOWN_MSG: