[Fedora-directory-devel] Request for reviews and comments: [Bug 183222] Directory Server hangs when running VLV search and update operations simultaneously.

[Noriko Hosoi]

Summary: Directory Server hangs when running VLV search and update operations simultaneously.

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=183222

There are at least two hang-up problems in the concurrent vlv search
and delete.  Please take a look at the attachment (id=142507)
 --> (https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=142507&action=vie...)
for details.

And the following attachment is the proposed fix based upon the analysis.

------- Additional Comments From [e-mail]  2006-11-30 14:23 EST -------
Created an attachment (id=142508)
 --> (https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=142508&action=vie...)
cvs diffs

Files:
 proto-back-ldbm.h
 idl.c
 sort.c
 vlv.c

Changes:
1. promoted idl_delete to global to make it available in
vlv_trim_candidates_byvalue.  In vlv_trim_candidate_byvalue, if any id's in the
idlist is found not having the corresponding entry, delete the id from the
idlist and retry the binary search.
2. demoted too noisy error message:
   [...] - compare_entries db err -30990
   [...] - compare_entries db err -30990
   [...]
3. eliminated read-lock from vlv_find_index_by_filter to prevent the deadlock
with the delete operation.

Thank you,
--noriko