How to check the open file limits
check currently limit
ulimit -n
Check hard limit
ulimit -Hn
Check soft limit
ulimit -Sn
Update it for the current shell:
ulimit -c unlimited
or
ulimit -c 1048576
Update it permenently:
vi /etc/security/limits.conf # or /etc/limits.conf
Add the following line
* soft nofile unlimited