[ZODB-Dev] ZEO select.error: (9, "Bad file desriptor")

[JohnD.Heintz]

We are using the standard binary install download through www.python.org =
for=20
the Windows boxen, so I don't think it's a build issue.

On Linux I compiled the source with pretty standard .
/configure --prefix=3D<>
make
make install

so I don't think that I've done anything weird there either. =20

As for closing the self._fileno I'll put some print statments into the co=
de=20
to see if I can trace the lifecycle but I'm not doing in my code between=20
FileStorage and ClientStorage creation.

Thanks,
I'll keep looking.
John

On Wednesday 13 June 2001 12:05, Andrew Kuchling wrote:
> On Wed, Jun 13, 2001 at 11:50:17AM -0500, John D. Heintz wrote:
> >    try: r, w, e =3D select.select([self._fileno],[],[],0.0)
> >select.error: (9, 'Bad file descriptor')
>
> Could the self._fileno descriptor be getting closed by another thread?
>
> On Linux, the (0, 'No error') select.error you saw on Windows usually
> indicates a threading mismatch when Python was compiled.  Quoting from
> an old post of mine, "The most common cause of I/O errors being
> reported as error number 0 on Linux is a problem with threads.  With
> WITH_THREAD defined, GNU libc provides a thread-specific errno
> variable by defining errno as "*(errno_location())"; without
> WITH_THREAD, it's defined as "extern int errno".  Errors of zero can
> therefore occur if different object files were compiled with different
> definitions of errno, since one file winds up looking in the wrong
> place."
>
> Could something similar be happening with your Windows build of
> Python?
>
> --amk
>
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--=20
=2E . . . . . . . . . . . . . . . . . . . . . . .

John D. Heintz | Senior Engineer

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