If pg_dump can't seek on its output stream when writing a dump in the custom archive format (possibly because you piped its stdout to a file) it can't update that file with data offsets. These files will often break parallel restoration. Warn when the user is doing pg_restore on such a file to give them a hint as to why their restore is about to fail.
The documentation for pg_restore -j is also updated to suggest that you dump custom archive formats with the -f option. --- doc/src/sgml/ref/pg_restore.sgml | 9 +++++++++ src/bin/pg_dump/pg_backup_custom.c | 8 ++++++++ 2 files changed, 17 insertions(+)
0001-Warn-when-parallel-restoring-a-custom-dump-without-d.patch
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