Strange behavior of pidof function

I have application based on node server file. The path to it:

Code:

/var/www/clients/client11/web28/web/nodejs/biodermagame

directory listing:

Code:

root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# ls
biogame-server.js  biogame-server-local.js  biogame-server-prod.js  config  libs  modules  node_modules  package.json  package-lock.json  webpack.node.js

Server file is biogame-server-prod.js and it is running but somehow pidof function does not find the process id under:

Code:

root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-server-prod.js
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-server-prod.j
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-server-prod.
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-server-pro
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-server-pr
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-server-p
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-server-
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-server
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-serve
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-serv
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-ser
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-se
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-s
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame-
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogame
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biogam
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof bioga
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof biog

but under "bio":

Code:

root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# pidof bio
28405
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame#

Server process is biogame-server-prod.js as shows attached screen from ProcessMonitor2 (pm2 for node servers). Does anybody know what happens?

PS
I wrote another example here.

 

I don't think there is any formal support for node.js here, but I could be wrong.

 

I wrote thread here, because I think it's not related with node but with pidof function, which is Linux thing and here are many Linux specialists. I thought that maybe for some node servers is too long path and pidof cut some letters, because for one node server is path:

Code:

/var/www/clients/client11/web28/web/nodejs/biodermagame/biogame-server-prod.js

and result of pidof is like I put in earlier post, but for example this server

Code:

/var/www/clients/client31/web91/web/quiz3m-server-prod.js

has result without cutting any letters:

Code:

root@s1:~#pidof quiz3m-server-prod.js
22836

Another example with testing env node server:

Code:

/var/www/clients/client4/web4/web/tquiz3m/quiz3m-server-test.js

has result with cutting letters:

Code:

root@s1:~#pidof quiz3m-server-tes
1763

 

You should check what is the name of the process with:

Code:

ps -ef | grep -i bio

 

There is output:

Code:

root@s1:~# ps -ef | grep -i bio
root      8368  2084  0 10:37 ?        00:00:01 node /var/www/clients/client11/web28/web/nodejs/biodermagame/bio

but there isn't server file called "bio":

Code:

root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame# ls -l
total 412
-rw-r--r--   1 web28 client11    816 Jun 21 13:54 biogame-server.js
-rw-r--r--   1 web28 client11  16063 Jun 21 13:54 biogame-server-local.js
-rw-r--r--   1 web28 client11  16384 Jun 25 11:22 biogame-server-prod.js
drwxr-xr-x   3 web28 client11   4096 Jun 21 13:54 config
drwxr-xr-x   2 web28 client11   4096 Jun 21 13:54 libs
drwxr-xr-x   3 web28 client11   4096 Jun 21 13:54 modules
drwxr-xr-x 773 root  root      28672 Jun 25 10:12 node_modules
-rw-r--r--   1 web28 client11   1065 Jun 21 13:54 package.json
-rw-r--r--   1 web28 client11 332632 Jun 25 10:12 package-lock.json
-rw-r--r--   1 web28 client11   2272 Jun 21 13:54 webpack.node.js

 

Actually the process is node and not bio. The /var/www/clients/client11/web28/web/nodejs/biodermagam/bio is just the parameter of node. So it seems that node.js is cutting it off and not pidof.

From what i have been reading this might have to do with how parameters are given to node.js.

You might try to execute it manually in the following ways:

1. run node.js with the entire path to the server as parameter
2. go to the folder were the server is located and run node.js with only the servername (excluding the path)

and see what the results into after doing another
ps -ef | grep -i bio

 

When run:

Code:

node /var/www/clients/client11/web28/web/nodejs/biodermagame/biogame-server-prod.js

I have - result of ps -ef | grep -i bio ("bio" in biodermagame and in biogame-server-prod.js are marked in red):

Code:

root     18428  3761  2 15:08 pts/0    00:00:01 node /var/www/clients/client11/web28/web/nodejs/biodermagame/biogame-server-prod.js

pidof result:

Code:

root@s1:~# pidof biogame-server-prod.js
root@s1:~# pidof /var/www/clients/client11/web28/web/nodejs/biodermagame/biogame-server-prod.js
root@s1:~# pidof bio
root@s1:~#

---
When run from path /var/www/clients/client11/web28/web/nodejs/biodermagame where is stored server file:

Code:

root@s1:~# cd /var/www/clients/client11/web28/web/nodejs/biodermagame/
root@s1:/var/www/clients/client11/web28/web/nodejs/biodermagame#node biogame-server-prod.js

pidof result:

Code:

root@s1:~# pidof bio
root@s1:~# pidof biogame-server-prod.js
root@s1:~# pidof /var/www/clients/client11/web28/web/nodejs/biodermagame/biogame-server-prod.js
root@s1:~#

result of ps -ef | grep -i bio:

Code:

root@s1:~# ps -ef | grep -i bio
root     25403  3761  0 15:15 pts/0    00:00:01 node biogame-server-prod.js

PS
When I run this server using ProcessManager2, there is something funny:

Code:

root@s1:~# pm2 start /var/www/clients/client11/web28/web/nodejs/biodermagame/biogame-server-prod.js
root@s1:~# ps -ef | grep -i bio
root     26669  2084  0 15:20 ?        00:00:01 node /var/www/clients/client11/web28/web/nodejs/biodermagame/bio
root@s1:~# ps -ef | grep 26669
root     26669  2084  0 15:20 ?        00:00:01 node /var/www/clients/client11/web28/web/nodejs/biodermagame/bio
root@s1:~# pidof bio
26669

So it looks like ProcessManager cut letters but why...

 

Hmm... so in both cases it's actually showing the parameter completely, including the long path. So it's definitely not a node.js problem, neither a pidof problem.
However when you run the application manually pidof is not finding anything...., it should be showing though if you run

Code:

pidof -x %scriptname%

But the point of this test was to see if the scriptname would get cutoff or not, and it's not.
What proces/application/script is responsible for starting the server? have a look at that, how it passes the parameter to node.js.

 

I uses ProcessManager2 (pm2), because then started node server works also when console is closed. So it looks like ProcessManager cut letters. Hmm...

 

So basically with

Code:

pm2 start %scriptname%

How about trying with with the scriptname inside quotes?

 

Script name in form like below?

Code:

pm2 start %/var/www/clients/client11/web28/web/nodejs/biodermagame/biogame-server-prod.js%

 

no, in this form

Code:

pm2 start '/var/www/clients/client11/web28/web/nodejs/biodermagame/biogame-server-prod.js'

I must immediately say i don't know pm2 that well (or at all ) but i read here and there a problem of passing these parameters without quotes inside javascripts to nodejs

 

Thank you I will check it.

EDIT
I checked. Result is exactly this same like without quotes.

 

All i can do now is to suggest you to raise an issue with pm2 on:
https://github.com/Unitech/pm2/issues

 

Yea, very good idea. I suppose I will have to describe whole problem in details there.

PS
I have created some thread