jdk14 & tomcat-5.0, JVM stops and consumes 100% CPU

[Palle Girgensohn]

Hi!

I have a problem with jdk14 + tomcat, and believe it is the HotSpot Server 
VM that fails.

We're running jdk + tomcat.

After running for hours or days, suddenly the JVM stop and consumes 100% 
CPU cycles. This can go on for a minute, sometimes ten, then its back to 
normal.

All access are routed via apache & mod_jk, and mod_jk's log says:

  [Mon Sep 13 11:38:49 2004]  [jk_ajp_common.c (1303)]: ERROR: Client 
connection aborted or network problems

repeatedly when the problem occurs.

I log apache with %T (service time in seconds) and it reveals that apache 
has to wait for the JVM.

I suspected Garbage collection, but a log of GC (-Xloggc:/tmp/filename) 
reveals nothing special.

top reveals 100% CPU usage for java. I truss:ed a JVM before restarting, 
output attached, although it doesn't really make any sense...

There is no extra load on the machine at the time, it can happen to an 
almost idle system. I've seen it happen when the first request after an 
idle period happens, and also under normal, pretty constant load.

Removing `-server' from java's option list seems to also remove the 
problem, so I guess there's a bug in the HotSpot Server VM? Any ideas, how 
can I help debugging?

jdk-1.4.2p6_4
tomcat-5.0.24
FreeBSD-4.10
apache+mod_ssl-1.3.31+2.8.18_4
mod_jk-1.2.5_1,1

This happens on several different machines, same setup

/Palle
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SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             ERR#185360396 'Unknown error: 185360396'
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             ERR#185360396 'Unknown error: 185360396'
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             = 17548 (0x448c)
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             ERR#185360396 'Unknown error: 185360396'
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
gettimeofday(0x88eee44,0x0)                      = 0 (0x0)
gettimeofday(0x88eeeb4,0x0)                      = 0 (0x0)
poll(0x88f0400,0x0,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             = 185446412 (0xb0db00c)
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             ERR#185360396 'Unknown error: 185360396'
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             = 185446412 (0xb0db00c)
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             ERR#185360396 'Unknown error: 185360396'
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             ERR#185360396 'Unknown error: 185360396'
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             ERR#185360396 'Unknown error: 185360396'
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
gettimeofday(0x88eee44,0x0)                      = 0 (0x0)
gettimeofday(0x88eeeb4,0x0)                      = 0 (0x0)
poll(0x88f0400,0x0,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             ERR#185360396 'Unknown error: 185360396'
SIGNAL 27
SIGNAL 27
gettimeofday(0x281057a8,0x0)                     = 0 (0x0)
sigprocmask(0x3,0x28105818,0x0)                  = 0 (0x0)
poll(0x805f000,0x3,0x0)                          = 0 (0x0)
sigreturn(0x88ab8e0)                             ERR#185360396 'Unknown error: 185360396'