Re: ftell mismatch with expected position

On 10/29/2015 02:51 AM, Eelke Klein wrote:
> I am getting the following warning when our program runs pg_dump.exe and
> the output is in custom format and send to standard out which is
> connected to a pipe (Windows platform).
>
> pg_dump: [custom archiver] WARNING: ftell mismatch with expected
> position -- ftell used

Can you show us the exact command, with arguments, that you are using?

Also what is the size of the dump file you are creating?

>
> The output of pg_dump is received by another process that copies it (and
> some other data) into a zip file. When I extract the db backup from the
> zip the backup is fine and I can restore it.
>
> I have both tried the pg_dump.exe from the 9.5 alpha and a stable 9.4
> both generate this warning.
> When I change the format to plain the warning goes away.
> When I call pg_dump from the commandline and let it send to standard out
> and redirect it to a file the warning does not occur but it does occur
> when I redirect to nul.
>
> Is there a way to prevent this warning? I would think pg_dump shouldn't
> call ftell on a pipe.
>
> Regards, Eelke

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com