Too Many Open Files with Hudson
November 15, 2010
I was getting an error during the build of my java project though Hudson, which was saying:
ZoneInfo: /usr/java/jdk1.6.0_22/jre/lib/zi/ZoneInfoMappings (Too many open files)
Looking around, this was caused because my user had too many files open (surprise, surprise!)
$ cat /proc/sys/fs/file-max 387511
gives the the total number of file handles available on the machine. I couldn't see that I was hitting this.
However,
$ ulimit -n 1024
gives the number of file handles available to the currently logged in user. 1024 is a bit low, given the complexity of my code.
I was on fedora 14, the way to change this is to edit /etc/security/limits.conf and add:
hudson hard nofile 4096
