Hi,
I am new in Linux OS, and I setup a server with Ubuntu 10.04 and openfire 3.6.4. I can login this openfire server with pidgin, but server will be no responding after over 900 accounts are logged in. Please give me some idea to solve this problem.
Symptoms:
- Server will be no responding after over 900 accounts are logged in.
lsof -p XXXX | wc -l command returns 1078~1085 in many testing cycles (XXXX is ID of Java)
- I found following information in log files of openfire (warn.log)
java.io.IOException: Too many open files
at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:145)
at org.mortbay.jetty.nio.SelectChannelConnector$1.acceptChannel(SelectChannelConne ctor.java:75)
at org.mortbay.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:475)
at org.mortbay.io.nio.SelectorManager.doSelect(SelectorManager.java:166)
at org.mortbay.jetty.nio.SelectChannelConnector.accept(SelectChannelConnector.java :124)
at org.mortbay.jetty.AbstractConnector$Acceptor.run(AbstractConnector.java:707)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
What I did for this issue are as follow:
1.Modify “/etc/default/openfire”
DAEMON_OPTS="-Xms512m -Xmx2048m -Xss1024k -Xoss1024k -XX:ThreadStackSize=128 -XX:+PrintGCDetails -Xloggc:/tmp/Openfire-gc.log -XX:MaxPermSize=128m -Djava.net.preferIPV4Stack=true -XX:+HeapDumpOnOutOfMemoryError"
2.Modify Ulimit by “ulimit -SHn 4096”
ulimit -SHa
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 20
file size (blocks, -f) unlimited
pending signals (-i) 16382
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 4096
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) unlimited
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
3.Modify file-max in
/etc/sysctl.conf to 400000 and do "sysctl -p"
4.Add settings in
/etc/security/limits.conf (openfire is user name)
* - nofile 4096
openfire soft nofile 4096
openfire hard nofile 4096
5.To unmark a line in /etc/pam.d/su
session required pam_limits.so
- I did all above modifications, but is still failed
- After I open over 500 files by Office and gedit and do the login test again, issue remains and lsof -p XXXX | wc -l command also returns 1078.
System configuration:
OS: Ubuntu 10.04(lucid) kernel 2.6.32-25-server Gnome 2.30.2
Java: 1.6.0_18, OpenJDK 64-Bit Server VM (build 16.0-b13, mixed mode)
RAM: 7.8GB
CPU: Intel Xeon E5320 1.86GHz
Attached please find the zip file which includes following data:
1.Warning log of openfire
2.Some settings like limits.conf, /etc/default/openfire …etc
Please give me some idea to solve this problem.
Thanks a lot.