Yes, I'm wondering if the stream object/functions are not closing the file
properly after reading, or something like that.
Mike
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Mike Cowlishaw, IBM Fellow
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"Sahananda (Jon) Wolfers" <[email protected]>
25/01/2010 09:27
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Re: [Oorexx-devel] SysFileDelete Access denied
I have observed something that sounds similar using 3.2 under windows XP.
The way it *feels* to me is that when processor usage is high and you
close a file using ooRexx, the file is not 'freed' by the operating system
until later. Putting a syssleep in sometimes helps, but not always. My
guess is that the OS clearing some flag is handled in a lower priority
queue that is not attended to until the processor load goes down. I
cannot prove or reliably demonstrate this.
Furthermore, I have a feeling that the way other applications close files
is different and perhaps more robust, so If I have a file ostensibly
closed by ooRexx and I attempt to reuse it with ooRexx it fails, but If I
open it with notepad and then close it with notepad ooRexx can then
successfully reopen it. Again, I cannot recreate this and am unsure that
my explanation accurately reflects what is happening.
I hope that is of some help,
Jon
2010/1/25 Mike Cowlishaw <[email protected]>
I have a little program that occasionally fails. Unfortunately it is run
thousands of times a day, so fails once or twice a day. Essentially it
does this:
reads a file X and records the content
closes the file X
processes and modifies the content
writes the content to a temporary file
call sysfiledelete X
renames the temporary file to X
Sometimes the rename would fail, and it turned out that this was because
the sysfiledelete was failing with rc=5 (access denied).
I've worked around the problem by adding a retry loop with a short delay
-- but any ideas what could be causing the problem? The program is
running in it's own process, and no other process uses the file (except
perhaps Windows Search, but I wouldn't expect that to be looking at a data
file, nor so often).
This is on Windows 7, ooRexx 4.00
Mike
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