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The "BindException" page has been changed by SteveLoughran: http://wiki.apache.org/hadoop/BindException Comment: entry on bind exceptions New page: = BindException = 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. 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. 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.
