Failed to start namenode. java.net.BindException Port in use

[#1]

hi,

when we start the namenode we get Port in use

how to know which port is in use ?

ERROR namenode.NameNode (NameNode.java:main(1774)) - Failed to start namenode. java.net.BindException: Port in use: master01.pp.com:50070 at org.apache.hadoop.http.HttpServer2.constructBindException(HttpServer2.java:983) at org.apache.hadoop.http.HttpServer2.bindForSinglePort(HttpServer2.java:1006) at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:1063) at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:920) at org.apache.hadoop.hdfs.server.namenode.NameNodeHttpServer.start(NameNodeHttpServer.java:170) at org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:933) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:746) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:992) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:976) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1701) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1769) Caused by: java.net.BindException: Address already in use 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.bindListener(HttpServer2.java:971) at org.apache.hadoop.http.HttpServer2.bindForSinglePort(HttpServer2.java:1002) ... 9 more

[#2 · Accepted solution]

@uri ben-ari

What does the netstat output shows on the NN host?

The "java.net.BindException: Port in use master01.pp.com:50070" indicates that the port is being used by some other process. So please find the Process which is using that port and kill that then try restarting the NN.

# netstat -tnlpa | grep 50070

.

[#3]

@uri ben-ari

The error says port is 50070

Port in use master01.pp.com:50070

.

So you need to kill the Process that is listed in the netstat output.

#  netstat -tnlpa | grep 50070

#  kill  -9  $THE_PID_FROM_ABOVE_COMMAND

.

[#4]

sorry you right

[#5]

cheers @Jay Kumar SenSharma , that solved my other issue

[#6]

Jay can you please help with the case - https://community.hortonworks.com/questions/142356/how-to-recover-the-standby-name-node-in-ambari-cl...