Re: [HACKERS] Backend Cache Invalidation

"Tim Perdue" <perdue(at)raccoon(dot)com> writes:
> Is anyone willing to tell me what this means:
> NOTICE: SIAssignBackendId: discarding tag 2147449930
> Connection to database 'db_domain' failed.
> FATAL 1: Backend cache invalidation initialization failed

This is coming from SIAssignBackendId() in
backend/storage/ipc/sinvaladt.c. Maybe I'm missing something,
but the logic in that routine (as of current CVS sources)
sure looks wrong.

Lines 130-138 look like they are checking for no-longer-used
procState entries that can be recycled, but (a) the test is
not obviously correct (and I'm always suspicious of code that's
both this complicated and comment-free); (b) lines 151-158
reject any entry that doesn't have tag InvalidBackendTag or
backendTag, meaning that lines 130-138 could be diked out with
no loss of functionality.

Something is wrong here...

regards, tom lane