Friday, 9 November 2018

How many open files ? "Too many open files"

I saw this today: -

[09/11/18 11:18:19:403 GMT] 00000176 FileDocument  E   ADMR0104E: The system is unable to read document /opt/ibm/WebSphere/AppServer/profiles/Dmgr01/config/temp/download/cells/odm892Cell01/cell.xml: java.io.IOException: Too many open files

during an IBM ODM Rules build.

This was a new RHEL 7.6 VM.

Guess what I'd forgotten ?

Yep, my ulimits etc.

<snip>
Set Ulimits etc.

vi /etc/security/limits.d/20-nproc.conf

# - nofile - max number of open files
wasadmin   soft    nofile  65536
wasadmin   hard    nofile  65536

# - nproc - max number of processes
wasadmin   soft    nproc   16384
wasadmin   hard    nproc   16384


vi /etc/security/limits.conf

* hard nofile 10240
* soft nofile 10240


vi /etc/sysctl.conf

fs.file-max = 524288
</snip>

A few vi commands and a reboot later, and we're good to go.

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