CODEWITHSUNDEEP
javascriptlinuxnode.js
arleitiss
arleitiss

Reputation: 1304

Node.js - Server crashes when started on startup, doesn't crash when manually started

I am running Node.js and Socket.io for online chat. I have created a file in:

/etc/init/example.conf

it has two lines:

start on startup
exec forever start /var/www/example.com/html/server.js //location of server file.

Whenever I start file upload in chat application, it crashes but instantly restarts.

Whenever I kill node process though, and start it manually - it works fine.

I also can't get any logs or anything from terminal as when it's auto started - it doesn't print me anything to terminal.

I am still new to Node.js and Linux in general. Node.js is running on Express + Jade.

How do I determine specific cause?

Upvotes: 0

Views: 401

Answers (1)

arleitiss
arleitiss

Reputation: 1304

I managed to solve my problem, after a bit of searching around I found out about tail command.

My issue was a bit harder to trace because Node.js was a process started by autostart so when I launched terminal and connected to server, process was just running in background basically and I wouldn't get any output (including exception messages).

Anyway, solution that worked for me was:

I typed 

ps aux | grep node //to find PID of node process

then I went to following directory

cd /proc/[pid of running node service]/fd

In fd directory there are few objects you can get output from but if you want to attach and listen to servers output including uncaught exceptions, you need 1. So:

tail -f 1

that way I was able to cause website to crash and see the output.

Upvotes: 1

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