change the number of open files limit
cat /proc/<pid>/limits
lsof -p <pid>
diagnose too many open files issue
systemomap
I just put the line ulimit -n 8192 inside the catalina.sh, so when I do the catalina start, java runs with the specified limit above.
As a system administrator: The /etc/security/limits.conf file controls this on most Linux installations; it allows you to set per-user limits. You’ll want a line like myuser - nofile 1000.
Within a process: The getrlimit and setrlimit calls control most per-process resource allocation limits. RLIMIT_NOFILE controls the maximum number of file descriptors. You will need appropriate permissions to call it.
