Current workaround as documented in the readme:

[2015-01-24 17:51:54:375] info  - Pulse Process | Pulse REST API is ready.
events.js:85
      throw er; // Unhandled 'error' event
            ^
Error: listen EADDRINUSE
  at exports._errnoException (util.js:742:11)
  at Server._listen2 (net.js:1148:14)
  at listen (net.js:1170:10)
  at net.js:1253:9
  at dns.js:82:18
  at process._tickCallback (node.js:343:11)

This is the point when NodeSocket attemtps to create the web socket connection.

Check that a node process has not been left on port 8000 with:

lsof -i tcp:8000

If it has, you’ll get something like this back:

COMMAND   PID USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
node    54866 aral   18u  IPv4 0xaa9f31e18a8024bb      0t0  TCP *:irdmi (LISTEN)

Then kill the PID e.g.

kill 54866