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The "BindException" page has been changed by SteveLoughran: http://wiki.apache.org/hadoop/BindException?action=diff&rev1=1&rev2=2 Comment: fix formatting You can get a BindException {{{java.net.BindException: Address already in use}}} if a socket on a machine is already in use and a service (NameNode, JobTracker, DataNode, TaskTracker, HTTP Server, etc.) tries to create a sort on that same port to listen for incoming requests. How to track down the problem - 1. identify which port the program is trying to bind to + 1. identify which port the program is trying to bind to - 1. use {{{netstat -a -t --numeric-ports -p}}} to list the ports that are in use by number and process. + 1. use {{{netstat -a -t --numeric-ports -p}}} to list the ports that are in use by number and process. - 1. identify the port that is in use and the program that is in use + 1. identify the port that is in use and the program that is in use - 1. try and identify why it is in use. Telnet <port> and pointing a web browser at it are both good tricks. + 1. try and identify why it is in use. Telnet <port> and pointing a web browser at it are both good tricks. - 1. change the configuration of one of the programs to listen on a different port. + 1. change the configuration of one of the programs to listen on a different port.
