We've installed quite a few instances of Tomcat on clients sites, both
on Windows and Linux, but we've never had a problem quite like this.
The system has been installed since the end of 2006, on Red Hat EL 3,
Tomcat 5.5.20 and JVM 1.5_09, but they have only just noticed this
problem (so it may have been there from the start or just started happening)
When they go into 'top' and sort it on memory usage, they get this;
15:46:49 up 30 days, 4:30, 4 users, load average: 0.07, 0.03, 0.01
713 processes: 712 sleeping, 1 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
total 0.1% 0.0% 0.2% 0.0% 0.0% 0.0% 99.5%
cpu00 0.5% 0.0% 0.1% 0.0% 0.0% 0.0% 99.2%
cpu01 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 100.0%
cpu02 0.0% 0.0% 0.1% 0.0% 0.0% 0.0% 99.8%
cpu03 0.1% 0.0% 0.5% 0.0% 0.0% 0.1% 99.0%
Mem: 4095372k av, 4062760k used, 32612k free, 0k shrd, 62392k
buff
2131520k actv, 971988k in_d, 81820k in_c
Swap: 4192880k av, 0k used, 4192880k free 1776472k
cached
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND
6750 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:10 2 java
6751 tomcat 15 0 468M 468M 16424 S 0.0 11.7 7:04 2 java
6752 tomcat 15 0 468M 468M 16424 S 0.0 11.7 7:05 3 java
6753 tomcat 15 0 468M 468M 16424 S 0.0 11.7 7:04 1 java
6754 tomcat 15 0 468M 468M 16424 S 0.0 11.7 7:05 2 java
6755 tomcat 15 0 468M 468M 16424 S 0.0 11.7 2:39 0 java
6756 tomcat 15 0 468M 468M 16424 S 0.0 11.7 0:19 2 java
6757 tomcat 15 0 468M 468M 16424 S 0.0 11.7 0:32 2 java
6758 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6759 tomcat 15 0 468M 468M 16424 S 0.0 11.7 0:00 1 java
6760 tomcat 15 0 468M 468M 16424 S 0.0 11.7 0:52 3 java
6761 tomcat 16 0 468M 468M 16424 S 0.0 11.7 1:02 3 java
6762 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6763 tomcat 15 0 468M 468M 16424 S 0.0 11.7 13:55 1 java
6806 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 2 java
6818 tomcat 16 0 468M 468M 16424 S 0.0 11.7 1:04 0 java
6819 tomcat 15 0 468M 468M 16424 S 0.0 11.7 120:59 1 java
6838 tomcat 17 0 468M 468M 16424 S 0.0 11.7 1:03 2 java
6840 tomcat 15 0 468M 468M 16424 S 0.0 11.7 119:56 0 java
6855 tomcat 15 0 468M 468M 16424 S 0.0 11.7 23:39 3 java
6856 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6857 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6858 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6859 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6860 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6866 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6867 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6868 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6869 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6872 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6873 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6874 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6875 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6876 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6877 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6893 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6894 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6895 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6896 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6897 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
6898 tomcat 25 0 468M 468M 16424 S 0.0 11.7 0:00 0 java
Normally, I only expect to see 2,3,4 or 5 java processes associated with
the Tomcat user, not all of the above!
Has anyone seen this before? It surely doesn't look normal... Does it
point to the JVM, Tomcat or something else? Is it something to do with
the fact that's running on a SMP system? I'm really stuck, which is why
I'm wondering if anyone on the list can point me in the right direction
for a solution.
Thanks in advance.
John
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