Thread: Bug report from pgsql-bugs (cygipc?)

Hello all,

previously posted to pgsql-bugs:
http://archives.postgresql.org/pgsql-bugs/2003-03/msg00209.php

As it didn't get much traction there (since the bug does appear isolated to
cygwin; race condition in cygipc?), is anyone here able to:

a) replicate the problem on their system?
b) confirm our suspicions of cygipc (and/or point us in the right direction
for correcting the culprit)

Cheers,
Claudio

Certain disclaimers and policies apply to all email sent from Memetrics.
For the full text of these disclaimers and policies see
http://www.memetrics.com/emailpolicy.html

Hello,

> a) replicate the problem on their system?
I've reproduced it
on

Win2K (SP3)
cygwin     1.3.21-1
cygipc     1.13
postgresql 7.3.2-1

It hangs after about 1000 create/drop pairs.

> b) confirm our suspicions of cygipc (and/or point us in the right
direction for correcting the culprit)
I'm sorry, I could help any further.

By,
Joerg.

Hello, again
> > b) confirm our suspicions of cygipc (and/or point us in the right
> direction for correcting the culprit)
> I'm sorry, I could help any further.
Of course, I wanted to say "I could not help any further",
but now I found that not only psql hangs.
It seems, that ipc-daemon hangs too.
Nor I can't start postmaster again,
neighter I can't leave the sesseion where
ipc-daemon runs (with Ctl-D).
Only "hard" close of window worked.

I know, it's not a big help, but it also points to cygwin/ipc.

By,
Jörg.

Claudio,

On Mon, Apr 14, 2003 at 03:25:00PM +0200, Joerg Last wrote:
> > a) replicate the problem on their system?
> I've reproduced it on
>
> [snip]
>
> > b) confirm our suspicions of cygipc (and/or point us in the right
> > direction for correcting the culprit)
> I'm sorry, I could help any further.

Unfortunately, I think that the following applies:

    http://archives.postgresql.org/pgsql-cygwin/2003-04/msg00014.php

Jason

--
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6

> > I'm sorry, I could help any further.

Joerg, your help/insight is greatly appreciated.


> Unfortunately, I think that the following applies:
>
>     http://archives.postgresql.org/pgsql-cygwin/2003-04/msg00014.php
>
> Jason

Jason, is there any real point in trying to run debug versions of
Postgresql/cygipc? Seems like cygipc has a short life expectancy... Is there
a firm time-frame for the incorporation of SysV IPC in cygwin and/or can you
suggest a suitable starting point for "helping finish" it?

Cheers,
Claudio

Certain disclaimers and policies apply to all email sent from Memetrics.
For the full text of these disclaimers and policies see
http://www.memetrics.com/emailpolicy.html

Claudio,

On Tue, Apr 15, 2003 at 11:36:53AM +1000, Claudio Natoli wrote:
> Jason, is there any real point in trying to run debug versions of
> Postgresql/cygipc?

It depends on your perspective, motivation, etc.

> Seems like cygipc has a short life expectancy...

cygipc has been deprecated for a long time (on the order of years now),
but has *not* been replaced yet.

> Is there a firm time-frame for the incorporation of SysV IPC in cygwin

No.  Note that the previous, major contributor has gone AWOL too.

Hence, you may get some good short-term "bang for your buck" by
debugging the current code base.

> and/or can you suggest a suitable starting point for "helping finish"
> it?

See the following:

    http://cygwin.com/contrib.html

Jason

--
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6