[htdig-dev] Re: Database error with small data set

[Lachlan A. <lh...@us...>]

Just following up on that, the problem seems to be that =20
dbmfp->mfp->last_pgno  doesn't get read in properly when the database=20
is reopened.  I *assume* that it should be the last page actually=20
used, but at some point the free list allocates  71  (which was used=20
in the database when it was written in the previous program) despite=20
dbmfp->mfp->last_pgno  having been reset to 33.  I added the  if =20
statement below in the diagnostic section at the end of=20
CDB___memp_cmpr_alloc, and the only place it reports an error is the=20
one that causes the crash...

#ifdef DEBUG_CMPR
      fprintf(stderr,"CDB___memp_cmpr_alloc:: reuse free page %d from=20
weakcmpr\n", *pgnop);
      if (*pgnop > dbmfp->mfp->last_pgno)
          fprintf (stderr, "*******ERROR??  dbmfp->mfp->last_pgno %d,\=20
              allocating %d\n", dbmfp->mfp->last_pgno, *pgnop);
#endif

Good night :)
Lachlan

On Wednesday 05 March 2003 22:08, Lachlan Andrew wrote:

> I've got as far as finding that, at some point, page 3 has a chain
> 3->71->34, but that page 27 is then allocated the chain 27->70->71,
> so page 3 gets corrupted.  I'm about to start looking for the
> free-list.