Tips for solving "Too many open files" issue

When I tried to start Eclipse today, my Eclipse just popup an error which points to an log doesn't exists. I kept getting this error when I tried to restart it again.

So I executed it from command line console, and I got this error said:

java.util.zip.ZipException: error in openning zip file

So I removed some of jar files in features & plugins directory, and then the error change to:

and there's a line in frone of error said:

ZoneInfo: /usr/lib/jvm/java-6-sun-1.6.0.07/jre/lib/zi/ZoneInfoMappings (Too many open files)

I use the lsof to check the open file count of eclipse and found it's only 2107, so I use:

ulimit -n 4096 

to change the limitation to 4096, but it still doesn't work.

So I google a little and found someone said that actually eclipse will open files more than 10000, which are all in temporary directory. So I change the ulimit to 65535, and the probem solve.

To make the change permanently:

vi /etc/security/limits.conf

or 

echo 65535> /proc/sys/fs/file-max

echo 65535 > /proc/sys/fs/inode-max

use other number in your case.

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