RE: 3029 - Resource busy when opening IFS file

Anton,

The proper way to handle this is in UNIX/POSIX is with a mutex. Where your
code locks/waits for a mutex used by all the apps that use the file. Then
once your code is done using the file, release the mutex so the next waiter
can proceed.

But if you are calling the file APIs from RPG, you can just as effectively
( and more easily ) ALCOBJ an object on the system.  Create a data area
special for this purpose, then call a cl pgm to ALCOBJ the data area before
using the file.  After the file usage is done, call QCMDEXC to DLCOBJ the
data area.   The nice thing about the ALCOBJ/DTAARA approach is that you can
store the name of the using job in the dtaara for troubleshooting purposes.

-Steve


-----Original Message-----
From: Anton Gombkötö [mailto:gombkoetoe@xxxxxxxxxx]
Sent: Tuesday, October 14, 2003 2:24 PM
To: RPG programming on the AS400 / iSeries
Subject: 3029 - Resource busy when opening IFS file


Hi folks,

we are somewhere between the beginning and the middle of some stress
test of our new application, where we write and read to the IFS using
the UNIX style APIs from RPG quite a bit. The whole thing is something
like a mail office. Clients send and receive messages=files; these are
stored in "mailboxes" = IFS files.

When we have some hundred jobs running, we receive the message "3029"
which means "ressource busy". This happens not very often (yet), in
10.000 times it appears about 1 time.

What does it exactly mean? The IFS is busy? That would be a bit soon
for my taste; a tester just runs some scripts on just 3 PCs that FTP
files to the system, about 2.000 files in total at the moment, size of
about 3KB, containing 5 messages each, so we have 2.000 files with a
total data of 6MB that have to be copied and 10.000 files that have to
be splitted out of these 2.000. And in the process of that we do
receive 3029 for the OPEN (no matter WRITE/READ) either 0 times, 1
times or 2 times.

Due to the design, we can't really

Did anyone else receive this one? What do you do in your program when
you receive it?

Just wait a second and try again? (That seems to work all the time).
Or is there something to set, look at or ?

Thanks in advance for any advice!

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