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Programmatically stop and restart express servers (to change ports)

Programmatically stop and restart express servers (to change ports)

Problem

I'm looking to be able to basically change ports that my express app is running on.

I've tried:

server.on('close', function() {
  server.listen(3000);
});

server.listen(8080);
server.close();

This returns a cryptic node.js error. I'm running node v0.4.11, I'm upgrading now to see if that fixes it.

EDIT Here's the error:

Assertion failed: (!io->watcher_.active), function Set, file ../src/node_io_watcher.cc, line 160.

Thanks, Matt

Problem courtesy of: Matt

Solution

The issue is that .listen is asynchronous. By calling .close immediately after calling .listen, you are closing it before it has been opened.

Try this instead.

server.listen(8080, function() {
  server.close();
});
Solution courtesy of: loganfsmyth

Discussion

View additional discussion.



This post first appeared on Node.js Recipes, please read the originial post: here

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Programmatically stop and restart express servers (to change ports)

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