electrum-server does not respond

Hi,

I'm setting up an electrum server and have a problem getting the run_electrum_server running correctly - this process does not seem to respond.

Steps taken:
- installed electrum server using the provided python script
- setup a user account and specified it in /etc/electrum.conf
- increased allowed file handels for user in /etc/security/limits.conf
- downloaded a leveldb dump, set ownership of all files to user

- start server:

Code:

> sudo electrum-server start
Starting server as daemon
bash: line 0: ulimit: open files: cannot modify limit: Operation not permitted
nohup: redirecting stderr to stdout

- log says:

Code:

[03/04/2015-19:01:15] Starting Electrum server on XXX.XXX.XXX.XXX
[03/04/2015-19:01:15] Database version 3
[03/04/2015-19:01:15] Blockchain height 350446
[03/04/2015-19:01:15] UTXO tree root hash: b8bcc0587c80e07e3fd56da7e85faf2676d8dc35da1b1094f236936af1eeb958
[03/04/2015-19:01:15] Coins in database: 1400838008059941
[03/04/2015-19:01:15] TCP server started on XXX.XXX.XXX.XXX:50001

Now if I try "sudo electrum-server getinfo" the electrum-server process blocks and nothing happens. The log does not show anything. Process cpu usage is at ~100%.

Any suggestions on how to debug this?