[Swift-devel] "Timer was cancelled" error on Beagle on Swift script termination

[Mihael Hategan]

Ok. Fixed in cog 4.1.8 r3078. An info message is now logged instead of
the big nasty error.

Mihael

On Mon, 2011-03-28 at 09:21 -0700, Mihael Hategan wrote:
> Ok. So I'm gonna then go with timer thread killed during shutdown.
> 
> Here's the relevant code in Timer.java:
> public void run() {
>         try {
>             mainLoop();
>         } finally {
>             // Someone killed this Thread, behave as if Timer cancelled
>             synchronized(queue) {
>                 newTasksMayBeScheduled = false;
> ...
> private void sched(TimerTask task, long time, long period) { 
> //this is scheduleImpl in the IBM jvm
>         if (time < 0)
>             throw new IllegalArgumentException("Illegal execution
> time.");
> 
>         synchronized(queue) {
>             if (!thread.newTasksMayBeScheduled)
>                 throw new IllegalStateException("Timer already
> cancelled.");
> ...
> 
> I guess the solution here is to ignore this error during shutdown and
> simply not have timeouts.
> 
> Mihael
> 
> On Mon, 2011-03-28 at 10:05 -0500, Michael Wilde wrote:
> > This was run on an 0.92 release modified to support Beagle. Code was build from ~wilde/swift/src/0.92
> > 
> > We can/should try with plain 0.92,
> > on both Beagle and vanilla linux
> > building from both Beagle Java and Sun Java
> > 
> > Those are the variables I can think of to get closer to the root cause.
> > 
> > - Mike
> > 
> > ----- Original Message -----
> > > Hi Mihael, Mike,
> > > 
> > > I think Mike had built a local Swift with pbs+coaster capabilities for
> > > beagle. I am not sure if a clean install from repo has (if yes, I do
> > > not know which rev) these capabilities.
> > > 
> > > Ketan
> > > 
> > > 
> > > On Mon, Mar 28, 2011 at 2:04 AM, Mihael Hategan < hategan at mcs.anl.gov
> > > > wrote:
> > > 
> > > 
> > > The IBM implementation seems to do pretty much the same thing as the
> > > Sun
> > > one. Which is that they never call .cancel() on a timer.
> > > 
> > > So I don't understand what's happening here. I don't see any piece of
> > > code that cancels that timer. Are you all using the same swift
> > > installation? Can you try a clean install?
> > > 
> > > Mihael
> > > 
> > > 
> > > 
> > > 
> > > On Sun, 2011-03-27 at 20:12 -0500, Ketan Maheshwari wrote:
> > > >
> > > >
> > > > On Sun, Mar 27, 2011 at 4:23 PM, Mihael Hategan <
> > > > hategan at mcs.anl.gov >
> > > > wrote:
> > > > Actually I'm not so sure any more.
> > > >
> > > > My java Timer does not seem to have a scheduleImpl method.
> > > > What version
> > > > of java is this?
> > > >
> > > > On beagle it is java 1.6.0:
> > > >
> > > > [ketan at login2:~]$ java -version
> > > > java version "1.6.0"
> > > > Java(TM) SE Runtime Environment (build pxa6460sr9-20101125_01(SR9))
> > > > IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux amd64-64
> > > > jvmxa6460sr9-20101124_69295 (JIT enabled, AOT enabled)
> > > > J9VM - 20101124_069295
> > > > JIT - r9_20101028_17488ifx2
> > > > GC - 20101027_AA)
> > > > JCL - 20101119_01
> > > >
> > > > ===
> > > >
> > > > --Ketan
> > > >
> > 
> 
> 
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