这实际上是备用HA名称节点。它配置了与主要设置相同的设置，并且hdfs namenode -bootstrapStandby已成功运行。它开始出现在配置文件中定义的标准HTTP端口50070上：
<property>
<name>dfs.namenode.http-address.ha-hadoop.namenode2</name>
<value>namenode2:50070</value>
</property>
启动开始然后点击：
15/02/02 08:06:17 INFO hdfs.DFSUtil: Starting Web-server for hdfs at: http://hadoop1:50070
15/02/02 08:06:17 INFO mortbay.log: Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog
15/02/02 08:06:17 INFO http.HttpRequestLog: Http request log for http.requests.namenode is not defined
15/02/02 08:06:17 INFO http.HttpServer2: Added global filter 'safety' (class=org.apache.hadoop.http.HttpServer2$QuotingInputFilter)
15/02/02 08:06:17 INFO http.HttpServer2: Added filter static_user_filter (class=org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter) to context hdfs
15/02/02 08:06:17 INFO http.HttpServer2: Added filter static_user_filter (class=org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter) to context logs
15/02/02 08:06:17 INFO http.HttpServer2: Added filter static_user_filter (class=org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter) to context static
15/02/02 08:06:17 INFO http.HttpServer2: Added filter 'org.apache.hadoop.hdfs.web.AuthFilter' (class=org.apache.hadoop.hdfs.web.AuthFilter)
15/02/02 08:06:17 INFO http.HttpServer2: addJerseyResourcePackage: packageName=org.apache.hadoop.hdfs.server.namenode.web.resources;org.apache.hadoop.hdfs.web.resources, pathSpec=/webhdfs/v1/*
15/02/02 08:06:17 INFO http.HttpServer2: HttpServer.start() threw a non Bind IOException
java.net.BindException: Port in use: hadoop1:50070
at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:890)
at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:826)
at org.apache.hadoop.hdfs.server.namenode.NameNodeHttpServer.start(NameNodeHttpServer.java:142)
at org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:695)
at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:585)
at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:754)
at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:738)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1427)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1493)
Caused by: java.net.BindException: Cannot assign requested address
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:444)
at sun.nio.ch.Net.bind(Net.java:436)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)
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:885)
... 8 more
15/02/02 08:06:17 INFO impl.MetricsSystemImpl: Stopping NameNode metrics system...
15/02/02 08:06:17 INFO impl.MetricsSystemImpl: NameNode metrics system stopped.
15/02/02 08:06:17 INFO impl.MetricsSystemImpl: NameNode metrics system shutdown complete.
15/02/02 08:06:17 FATAL namenode.NameNode: Failed to start namenode.
java.net.BindException: Port in use: hadoop1:50070
at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:890)
at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:826)
at org.apache.hadoop.hdfs.server.namenode.NameNodeHttpServer.start(NameNodeHttpServer.java:142)
at org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:695)
at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:585)
at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:754)
at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:738)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1427)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1493)
Caused by: java.net.BindException: Cannot assign requested address
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:444)
at sun.nio.ch.Net.bind(Net.java:436)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)
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:885)
... 8 more
15/02/02 08:06:17 INFO util.ExitUtil: Exiting with status 1
15/02/02 08:06:17 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at hadoop1.marketstudies.com/192.168.1.125
************************************************************/
我尝试通过设置：
来更改http-address端口<property>
<name>dfs.namenode.http-address.local1-hadoop.hadoop1</name>
<value>hadoop1:10070</value>
</property>
但是我只使用新端口获得与上面相同的内容：
15/02/02 08:16:51 INFO hdfs.DFSUtil: Starting Web-server for hdfs at: http://hadoop1:10070
...
java.net.BindException: Port in use: hadoop1:10070
...
java.net.BindException: Port in use: hadoop1:10070
这是在主名称节点上使用相同的配置。
This Question似乎与我的问题相似，但答案并没有帮助。我尝试将dfs.http.address设置为其他内容并且它没有改变任何内容。我相信这是HA中用dfs.namenode.http-address.ha-name.namenodename
从这里可以看到实际上没有听到http端口：
# netstat -anp |grep LIST
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 946/sshd
tcp 0 0 0.0.0.0:46712 0.0.0.0:* LISTEN 2066/java
tcp 0 0 0.0.0.0:50010 0.0.0.0:* LISTEN 28892/java
tcp 0 0 0.0.0.0:50075 0.0.0.0:* LISTEN 28892/java
tcp 0 0 0.0.0.0:8480 0.0.0.0:* LISTEN 1471/java
tcp 0 0 0.0.0.0:10050 0.0.0.0:* LISTEN 2358/zabbix_agentd
tcp 0 0 0.0.0.0:50020 0.0.0.0:* LISTEN 28892/java
tcp 0 0 0.0.0.0:8485 0.0.0.0:* LISTEN 1471/java
tcp 0 0 0.0.0.0:8040 0.0.0.0:* LISTEN 2066/java
tcp 0 0 0.0.0.0:8042 0.0.0.0:* LISTEN 2066/java
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 1020/mysqld
tcp6 0 0 :::22 :::* LISTEN 946/sshd
尝试以root用户身份启动，看看它是否存在某种类型的perms问题，因为它会收听同样的错误。
答案 0 :(得分：4)
发现了这个问题。这来自此服务器的短历史记录，其中IP地址已更改，但/ etc / hosts文件只是附加了新文件而不是替换。我认为这让Hadoop启动困惑，因为它试图在一个不存在的界面上打开50070。错误是＆＃34;端口正在使用＆＃34;让这有点令人困惑。
答案 1 :(得分：2)
下载osquery https://code.facebook.com/projects/658950180885092
并安装
发出此命令osqueryi
当出现提示时，使用此sql命令查看所有正在运行的java进程并找到pids
SELECT name，path，pid FROM processes name =“java”;
你会在Mac上看到这样的东西
+------+--------------------------------------------------------------------------+-------+
| name | path | pid |
+------+--------------------------------------------------------------------------+-------+
| java | /Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home/bin/java | 59446 |
| java | /Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home/bin/java | 59584 |
| java | /Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home/bin/java | 59676 |
| java | /Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home/bin/java | 59790 |
+------+--------------------------------------------------------------------------+-------+
对所有进程发出sudo kill-PID命令，以确保它杀死正在使用的端口0.0.0.0:50070
然后在重试之后sbin / start-dfs.sh和namenode现在应该显示
答案 2 :(得分：0)
使用以下命令检查正在运行的进程并使用java：
ps aux | grep java
之后，使用上述命令中的PID终止与hadoop相关的所有进程，如下所示：
sudo kill -9 PID