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

  2. use netstat -a -t --numeric-ports -p to list the ports that are in use by number and process.

  3. identify the port that is in use and the program that is in use

  4. try and identify why it is in use. Telnet <port> and pointing a web browser at it are both good tricks.

  5. change the configuration of one of the programs to listen on a different port.

BindException (last edited 2011-09-30 16:38:17 by SteveLoughran)