Tuesday, October 20, 2009

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- (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

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

use other number in your case.

Saturday, October 10, 2009

when i saw Micello

I know that digital earth will finally come true.

we just need more people create these kind of fun application.

check micello from video on their website:

I promise this is not an ad.