Fujii Masao <masao(dot)fujii(at)gmail(dot)com> writes:
> You might have gotten the following problem which was discussed before.
> This problem was fixed in SIGQUIT signal handler of a backend, but ISTM
> not that of an archiver.
> http://archives.postgresql.org/pgsql-admin/2009-11/msg00088.php
pgarch.c's SIGQUIT handler just does exit(1), so it seems a bit unlikely
that that solution would make a difference. But we need to see a stack
trace to rule it out or not.
regards, tom lane