[PJUG Javamail] What causes "Too many open files" in Tomcat

[Chris Foster]

Check your ulimit. Chances are the Linux (or unix) file limit is too low.

- Chris

On Nov 3, 2009, at 2:53 PM, Rob Tanner <rtanner at linfield.edu> wrote:

Hi,

I’m getting messages like these in the catalina.out log:

java.net.SocketException: Too many open files
java.io.FileNotFoundException: /usr/dict/wordlist.pwd (Too many open files)
java.io.FileNotFoundException:
/var/apache/apache-tomcat-5.5.23/webapps/AccountManager/WEB-INF/classes/log4j.properties
(Too many open files)
java.net.SocketException: Too many open files



And, of course, I have to stop and restart Tomcat to get it to work again.
 This is not a system error; it’s only in Tomcat.  I did some googling and
found a suggestion with regard to Java arguments when Tomcat starts up.

These are the options I’m starting Tomcat with: '-XX:NewSize=128m
-XX:MaxNewSize=128m -XX:SurvivorRatio=8 -Xms256m -Xmx512m'

I’ve also gone through the most active apps and made sure that I was not
leaving any database or LDAP connections open.

Any ideas?

Thanks,
Rob



*Rob Tanner
*JAVA Developer
Linfield College, McMinnville Oregon



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