Monday 27 November 2017

Mongo error "Two many open files", mongod server does'nt start

Solution 1(temporary and tested):

If you're using bash, ulimit -n will only display the soft limit. To get the hard limit, you need to do ulimit -Hn.

On my system, I see this:

$ ulimit -n
1024  

 Set ulimit value to new value as following:
 
 $ ulimit -Hn
4096


ulimit -n <value> (this will only set for current session, better do it in a screen mode and run it in background)

 More info: Here

Solution 2(permanent and not tested):

Modify /etc/security/limits.conf with what you need. Example:

user soft nproc 64000

Restart machine to make the changes effective.

More info: Here

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