On 4/17/07, Ale Sarco <[EMAIL PROTECTED]> wrote:
Hi James, Using ActiveMQ 4.1.1 with Spring I experienced this "unable to create new native thread" exception in one of my production servers last night. The thing is that server does not has a large messaging traffic, it just send 2 or 3 messages every couple of minutes to another webapp running in the same Tomcat, and this is only for 2 hours a day, and there were plenty of memory available on the heap for that VM. I agree that is probably related to the file descriptors that you mentioned, because when I tried to log in to that server via SSH I got an error about something like "insufficient resources". Only when I restarted the webapp I was able to login again. Now, what file descriptors is this about? Is a (logical) file created somewhere every time a message is sent? If so, how do I avoid this problem, I guess they should be reused or something?
File descriptors are often used for various things in the OS; files, sockets, sometimes threads etc. ActiveMQ does not create a file or socket per message :). BTW how do things look in jconsole; do you have lots of connections on your broker? I wonder if you are not closing connections after they have been used (you are really meant to only use a small number of connections and lots of sessions). http://activemq.apache.org/how-do-i-use-jms-efficiently.html Just up the file descriptors setting on your OS and it should fix this -- James ------- http://radio.weblogs.com/0112098/
