我是hadoop的新手，正在尝试在windows中创建一个独立的hadoop集群。启动名称节点时出现错误，如下所示。但是，在windows中使用端口50070检查进程时，我找不到任何进程
hadoop错误：

20/04/18 08:32:24 ERROR namenode.NameNode: Failed to start namenode.
java.net.BindException: Port in use: 0.0.0.0:50070
        at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:919)
        at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:856)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeHttpServer.start(NameNodeHttpServer.java:142)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:752)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:638)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:811)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:795)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1488)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1554)
Caused by: java.net.BindException: Address already in use: bind
        at sun.nio.ch.Net.bind0(Native Method)
        at sun.nio.ch.Net.bind(Net.java:433)
        at sun.nio.ch.Net.bind(Net.java:425)
        at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
        at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:216)
        at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:914)
        ... 8 more
20/04/18 08:32:24 INFO util.ExitUtil: Exiting with status 1
20/04/18 08:32:24 INFO namenode.NameNode: SHUTDOWN_MSG:

windows端口检查：

λ netstat -ano | findstr :50070

c:\work\hadoop-2.7.2\sbin
有人能帮忙解决这个问题吗？