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The "BindException" page has been changed by SteveLoughran: https://wiki.apache.org/hadoop/BindException?action=diff&rev1=2&rev2=3 Comment: add mention of ports < 1024 as a possible cause 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. as root use {{{netstat -a -t --numeric-ports -p}}} to list the ports that are in use by number and process. (On OS/X you need to use {{{lsof}}}) 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. If the port number is below 1024, the OS may be preventing your program from binding to a "trusted port" 1. change the configuration of one of the programs to listen on a different port.