[erlang-bugs] R14B02+ crashes on older hardware, Windows XP

Dave Cottlehuber <>
Sat Jul 2 13:44:22 CEST 2011


On 2 July 2011 22:52, Mikael Pettersson <> wrote:
> sgm writes:
>  > We have a field data collection application recently re-written to use
>  > CouchDB. It requires minimal computer resources, so a number of the
>  > notebooks we use are circa 2001/2002. All run Windows XP with SP2 or
>  > SP3, and we are using CouchDB 1.1.
>  >
>  > On the older machines, Erlang R14B02 and R14B03 crash almost
>  > immediately upon running werl or erl. R14B01 does not.
>  >
>  > I'm attaching a screenshot of the crash on one of the machines. In all
>  > cases it happens at the same point, almost immediately, is 100%
>  > reproducible, and no crash dump is generated.
>  >
>  > Here are the machines where it crashes:
>  >
>  > Dell Inspiron 2500, 1.0GHz Pentium III, 160MB RAM, system summary
>  > rctc11.txt attached
>  > Dell Inspiron 2600, 1.06GHz Celeron, 128MB RAM, system summary
>  > rctc12.txt attached
>  > Gateway Solo 9300, 750MHz Pentium III, 160MB RAM, system summary
>  > rctc16.txt attached
>  >
>  > For comparison, I'm also including this machine of similar vintage
>  > which does NOT crash:
>  >
>  > Dell Inspiron 2650, 1.7GHz Pentium 4, 256MB RAM, system summary
>  > rctc13.txt attached
>
> You need to rebuild the Erlang VM with the --enable-ethread-pre-pentium4-compatibility
> option.
>
> This is a big ugly bug in the Erlang VM.

Mikael,

Thanks for the info. Is there any performance impact with using this
flag, on newer processors/architectures?

Steve, I'm wondering which CouchDB build you are using in case its one
of mine. Feel free to contact me offlist.

A+
Dave


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