WARNING: -server JVM on recent 5.x/6.x (was: Re: jdk14 &
tomcat-5.0, JVM stops and consumes 100% CPU)
Alexey Zelkin
phantom at FreeBSD.org.ua
Thu Sep 16 02:52:20 PDT 2004
On Thu, Sep 16, 2004 at 11:50:03AM +0300, Achilleus Mantzios wrote:
> O Alexey Zelkin ?????? ???? Sep 16, 2004 :
>
> > Gentelmen,
> >
> > Since gcc 3.4 import -server JVM is imfunctionable. It fails very early
> > and very hard to debug. Most likely it is some gcc optiomization related
> > problem. I am working on this now, but very slowly (because of
> > requirement to recompile everything on every change).
> >
> > Conclusion: Do not use -server switch for any java applications while
> > running CURRENT or RELENG_5 now!
>
> Right,
> but what about eclipse?
> On my gcc 3.4.2 5.3-BETA2, a freshly built jdk1.4.2-p6
> will also fail to run eclipse where no -server issue is involved.
Hmm.. I have set up clean machine for BETA2, built all ports from
scratch and see what java -server -version locks up on handled
signal (SIGBUS). Previously I had similar situations related to
incorect optimization code produced by gcc. So, if you've it working
you're lucky.
> Maybe the whole gcc34 situation is somehow problematic.
>
> >
> > On Mon, Sep 13, 2004 at 03:05:31PM +0200, Palle Girgensohn wrote:
> > > 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
> >
> > > ;; This buffer is for notes you don't want to save, and for Lisp evaluation.
> > > ;; If you want to create a file, first visit that file with C-x C-f,
> > > ;; then enter the text in that file's own buffer.
> > >
> > > 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'
> >
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>
> --
> -Achilleus
>
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