net: multiple listen() events fail silently #6190
Description
- Version: >= v4.x
- Platform: All
- Subsystem: net
It's possible to run listen() on a net.Server that's already listening to a port. The result is silent failure, with the side effect of changing the _connectionKey and or _pipeName.
More expected behavior would be to emit an error on the server's 'error' event handler.
Example test:
const assert = require('assert'); const net = require('net'); const server = net.createServer(); server.on('error', () => { process._rawDebug('server had an error'); }); server.listen(8080).listen(8081); process.on('exit', () => { assert.equal(server.address().port, 8080); const key = server._connectionKey; assert.equal(key.substr(key.lastIndexOf(':')), ':8080'); });