On Fri, Mar 23, 2012 at 02:13:57PM +0400, Denis Kudriashov wrote:
> Hello.
>
> I have standalone application with UI which hangs sometime (very *rarely*).
> This application has many threads which interacts with server.
> All interactions with server and UI activity logged.
>
> But at hang state there are no new log entries. There are no server
> interactions.
> It looks like all VM block image stuff. ("alt ." not work too).
> Logs always finished at same position. I know where I should add extra
> logging which give me information before hang.
>
> So I need help.
> What information about system can help me? What code I should use?
> Is somebody has same problems?
If this is Cog on Unix/Linux you can send SIGUSR1 to the VM to
cause it to print a diagnostic stack trace (the Smalltalk stacks)
to its output. That may give you a better idea of the source of
the problem. For example, from a Unix shell use "ps -f" to identify
the pid of the Cog VM process, and if the pid is 1234, then you can do
"kill -SIGUSR1 1234" and a stack trace will be printed to your terminal
window. (Note, a similar mechanism is present in OSProcess for use
with interpreter VMs).
Dave
>
> Application uses old cog VM (maybe one of first distributions from Eliot)
> and Pharo1.1.
> Application uses continuations actively.
> I want try updated VM. What version I should use? I need most reliable cog
> (not latest I think).
