[Koha-bugs] [Bug 36365] New: compare-es-to-db tool should offer a mode to reconcile differences

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=36365

            Bug ID: 36365
           Summary: compare-es-to-db tool should offer a mode to reconcile
                    differences
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P3
         Component: Command-line Utilities
          Assignee: koha-bugs at lists.koha-community.org
          Reporter: wizzyrea at gmail.com
        QA Contact: testopia at bugs.koha-community.org
                CC: robin at catalyst.net.nz

Koha can currently tell how many biblios are in the database vs how many are in
the elasticsearch indexes, but it cannot reconcile those differences without
either bespoke work deleting individual ES documents or a full reindex. A full
reindex might not solve the problem anyway, due to invalid data in MARC
records.

It would be really neat if the existing tool to compare-es-to-db.pl had a mode
that would at least try to reconcile any discrepancies. For example if it was
discovered that there were more indexes than biblios, remove the erroneous ES
documents, or if there were more biblios than es indexes, identify them and
attempt to reindex them.

We should also provide an easy to understand error report if reconciliation was
not possible, with suggested actions to take for the sysadmins or users.

This would obviously be an Elasticsearch only feature.

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