Management port is sensitive to packetization of input

[philandstuff]

If I enter an interactive netcat session with the statsd management port, I can enter multiple commands one by one:

$ nc 127.0.0.1 8126
counters
{ 'statsd.bad_lines_seen': 0, 'statsd.packets_received': 0 }
END

gauges
{}
END

quit

However, if I try to script this session, the management port doesn't understand:

$ echo -e "counters\ngauges\nquit" | nc 127.0.0.1 8126
ERROR

I think that this is because the management port assumes that each incoming line will be in a separate packet. But here it's getting a single packet with three separate lines in it, which it doesn't understand.

[philandstuff]

I had a brief look at using node's readline module to fix this, but that seems to do way more than just the line-buffering that is desirable here.

[draco2003]

Correct. The current implementation doesn't do any packet parsing for multiple commands.
We're looking to extract the management code out of the main stats.js into a module and at that point, we can look into adding or implementing something similar to this : https://github.com/pgte/carrier