Re: Strange etrace

On Wed, Feb 16, 2011 at 2:32 AM, Thomas Leonard <
tal-v5nx5w6akNyLE8xUarVfuPLx9OUvmyODWmv/[email protected]> wrote:

> On 02/02/11 02:02, Bill Frantz wrote:
> > On 2/1/11 at 1:51 PM, [email protected] (Thomas Leonard) wrote:
> >
> >> On 1 February 2011 06:39, Bill Frantz<[email protected]>  wrote:
> >>> I was running my data analysis program (Reads a file, processes
> >>> the data and writes a file. No promises, single vat, single
> >>> turn.) and I received the following etrace:
> >>>
> >>> === 2011-01-31T07:18:11.651Z
> >>> (PendingEvent.report:PendingEvent.java:107) WRN
> >>> causality: Problem in turn<<Vat start in<runs in start>>,3>:
> >>> --vvvv--
> >>> Failed: OldFarRef may only be smashed:<Far ref>
> >>
> >> There were a lot of problems like this in 0.9.2:
> >>
> >> http://www.eros-os.org/pipermail/e-lang/2009-November/013314.html
> >>
> >> Does it still happen with 0.9.3?
> >>
> >> http://www.erights.org/download/0-9-3/
> >
> > I installed 0.9.3d. With just a few executions, I didn't see the
> > "OldFarRef may only be smashed..." (I debug with println and a shell.)
> >
> > Note that I only saw it once in over 232 executions (the number
> > of files in my etrace directory). It doesn't seem to be very
> > repeatable. Note that the source code doesn't have any eventual
> > sends (no<- operators). I'm using E because it seems safer that
> > perl and I don't know python. :-)
>
> E uses several communicating vats even if you never create new vats in
> your own code: the start vat, a parser vat, and a eval vat (see
> eLauncherAuthor.emaker). This is why 0.9.2 often fails to start. Can we
> get 0.9.3 linked from the erights.org downloads page?
>

Done. Though my preference would be to move the maintenance of this and
other documentation from erights.org to wiki.erights.org, and point to it
from erights.org.



>
> > Note that I am getting zero length files in my etrace directory.
>
> By the way, if you're using traceln() for debugging then 0.9.3 uses
> java.util.logging, so messages will go to the console by default rather
> than to the E log.
>
>
> --
> Dr Thomas Leonard
> IT Innovation Centre
> 2 Venture Road
> Southampton
> Hampshire SO16 7NP
>
> Tel: +44 0 23 8076 0834
> Fax: +44 0 23 8076 0833
> mailto:tal-v5nx5w6akNyLE8xUarVfuPLx9OUvmyODWmv/[email protected]
> http://www.it-innovation.soton.ac.uk
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-- 
    Cheers,
    --MarkM

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