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Too many open files (once again)

goldmar

Hello,

I've got the following problem: I've followed the guidelines on increasing the open files limit but Alfresco still crashes now and then. Before I increased the limit, Alfresco was crashing several times a day; now it's better… but it still crashes a few times per week with lots of exceptions and socket failures due to "too many open files".

My limits are actually quite high:

*               soft    nofile          32768
*               hard    nofile          65536‍‍

Is this normal behaviour? Is there anything else I can do?

I'm using Alfresco CE 3.4.d.

Regards,
Mark

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Comments

loftux

What OS are you running?
Have you followed all the advice in http://wiki.alfresco.com/wiki/Too_many_open_files?

If you run the command found in that article to verify that the settings has taken effect, what is the result?

dranakan

Hello,

Check if the values are setted… Sample if your user is alfresco :

su - alfresco
ulimit -n # Soft
ulimit -Hn # Hard
‍‍‍‍

goldmar

Thanks for your suggestions. I'm using Ubuntu 10.04.3 Server LTS. I've rechecked all the stuff and it's really strange.

As expected:

root@myserver:~# su - tomcat6
$ ulimit -n
4096
$ ulimit -Hn
65536‍‍‍‍‍

But if I run for pid in `pidof java`; do echo "$(< /proc/$pid/cmdline)"; egrep 'files|Limit' /proc/$pid/limits; echo "Currently open files: $(ls -1 /proc/$pid/fd | wc -l)"; echo; done as suggested in the wiki:
(this is Alfresco; I've used the WAR package)

/usr/lib/jvm/java-6-sun/bin/java-Djava.util.logging.config.file=/var/lib/tomcat6/conf/logging.properties-Djava.awt.headless=true-Xms2048m-Xmx4096m-Xss1024k-XX:MaxPermSize=256m-XX:NewSize=1024m-Drun.mode=production-XX:+UseConcMarkSweepGC-Djava.net.preferIPv4Stack=true-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager-Djava.endorsed.dirs=/usr/share/tomcat6/endorsed-classpath/usr/share/tomcat6/bin/bootstrap.jar-Dcatalina.base=/var/lib/tomcat6-Dcatalina.home=/usr/share/tomcat6-Djava.io.tmpdir=/tmp/tomcat6-tmporg.apache.catalina.startup.Bootstrapstart
Limit                     Soft Limit           Hard Limit           Units
Max open files            1024                 1024                 files
Currently open files: 142‍‍‍‍

However, at the same time:

/opt/atlassian/jira/jre//bin/java-Djava.util.logging.config.file=/opt/atlassian/jira/conf/logging.properties-XX:MaxPermSize=256m-Xms256m-Xmx768m-Djava.awt.headless=true-Datlassian.standalone=JIRA-Dorg.apache.jasper.runtime.BodyContentImpl.LIMIT_BUFFER=true-Dmail.mime.decodeparameters=true-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager-Djava.endorsed.dirs=/opt/atlassian/jira/endorsed-classpath/opt/atlassian/jira/bin/bootstrap.jar-Dcatalina.base=/opt/atlassian/jira-Dcatalina.home=/opt/atlassian/jira-Djava.io.tmpdir=/opt/atlassian/jira/temporg.apache.catalina.startup.Bootstrapstart
Limit                     Soft Limit           Hard Limit           Units
Max open files            65536                65536                files
Currently open files: 457‍‍‍‍

Why does it work for JIRA but not for Alfresco? 😞

goldmar

It seems that this is the solution…