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

[Rob Tanner]

I thought about that but the problem isn¹t system wide.  But thanks because
you¹ve just reminded me that ulimit is shell specific although the default
of 1024 should certainly be sufficient.  I¹ve modified the catalina.sh start
up script to set ulimit to 4096 (ulimit ­n 4096).  That¹s definitely
overkill and if ulimit was the problem, I shouldn¹t see that error again.
I¹ll just need to keep an eye out.

Again thanks,

Rob


On 11/3/09 3:25 PM, "Chris Foster" <cjafoster at gmail.com> wrote:

> 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,
>> 
>> I¹m 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/log4
>>> j.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; it¹s only in Tomcat.  I did some googling and
>> found a suggestion with regard to Java arguments when Tomcat starts up.  
>> 
>> These are the options I¹m starting Tomcat with: '-XX:NewSize=128m
>> -XX:MaxNewSize=128m -XX:SurvivorRatio=8 -Xms256m -Xmx512m'
>> 
>> I¹ve 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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