Rails core - Jan 2006 - Bus Error on OpenBase Adapter

Good Evening,

The OpenBaseAdapter is almost ready to be submitted as a patch.  It  
passes all the tests except for 9 expected failures.  There is a bug  
in the way OpenBase processes limit/offset clauses.  I have a ticket  
number on this and it should be fixed in the next release of OpenBase.

However...

The adapter only passes all the tests if I run them one at a time.  I  
have a perl script (hey, you do what you know, right?) that executes  
each _test.rb file in it''s own ruby process.  If I use rake or the  
all.sh file, then the process will eventually crash with a Bus  
Error.  I''m thinking there may be a memory leak in the Ruby-OpenBase  
library I''m using, but I''m not sure.  I can''t tell
for sure which
test file is crashing, although i''ve had crashes at different points  
in the testing progress.

Usually it crashes at the same line of my adapter:

col_infos.each_index do |index|

where col_infos is an array of OpenBaseColumnInfo objects (a class  
defined in the Ruby-OpenBase library).  However, I have occasionally  
seen crashes (and memory warnings) in other files which seem to be  
part of the ruby language, i.e. outside of rails completely.

Anyway, since I''ve only been programming in Ruby for 2 weeks, I  
figured I''d throw this out and see if the experts have any insight to  
share.


-Derrick

"Perl''s grammar can not be reduced to BNF.
The work of parsing perl is distributed between
yacc, the lexer, smoke and mirrors.''''
-Chaim Frenkel

On Wed, 11 Jan 2006, Derrick Spell wrote:
> Good Evening,
>
> The OpenBaseAdapter is almost ready to be submitted as a patch.  It passes 
> all the tests except for 9 expected failures.  There is a bug in the way 
> OpenBase processes limit/offset clauses.  I have a ticket number on this
and
> it should be fixed in the next release of OpenBase.
>
> However...
>
> The adapter only passes all the tests if I run them one at a time.  I have
a
> perl script (hey, you do what you know, right?) that executes each _test.rb
> file in it''s own ruby process.  If I use rake or the all.sh file,
then the
> process will eventually crash with a Bus Error.  I''m thinking
there may be a
> memory leak in the Ruby-OpenBase library I''m using, but
I''m not sure.  I
> can''t tell for sure which test file is crashing, although
i''ve had crashes at
> different points in the testing progress.
>
> Usually it crashes at the same line of my adapter:
>
> col_infos.each_index do |index|
>
> where col_infos is an array of OpenBaseColumnInfo objects (a class defined
in
> the Ruby-OpenBase library).  However, I have occasionally seen crashes (and
> memory warnings) in other files which seem to be part of the ruby language,
> i.e. outside of rails completely.
>
> Anyway, since I''ve only been programming in Ruby for 2 weeks, I
figured I''d
> throw this out and see if the experts have any insight to share.
this is almost always indicative of a ruby and/or libs compiled for a slight
different arch.  probably using some sort of package manager (gem, rpm, etc)
could be the cause.  if you have not compiled ruby and all modules by hand
look here first.  another cause is having two rubys installed and picking up
the wrong one somehow.

-a
-- 
strong and healthy, who thinks of sickness until it strikes like lightning?
preoccupied with the world, who thinks of death, until it arrives like
thunder?  -- milarepa