https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=42653

--- Comment #3 from Pedro Amorim (ammopt) <[email protected]> ---
Created attachment 199368
  -->
https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=199368&action=edit
Bug 42653: get_backend_plugin should cache results per backend name

The plugin cache used a single slot, so the first backend looked up
poisoned it for all subsequent calls. This caused 500 errors when
viewing ILL requests that had been migrated between backends.

Test plan:
1) Download and install 2 additional plugin backends that implement
their own templates:
https://github.com/openfifth/koha-ill-libkey-lending-tool/releases/download/v2.6.1/koha-ill-libkey-lending-tool-v2.6.1.kpz
https://github.com/openfifth/koha-ill-reprintsdesk/releases/download/v4.2.0/koha-ill-reprintsdesk-v4.2.0.kpz

2) Enable ILLModule and run the following SQL:

INSERT INTO illrequests (borrowernumber, branchcode, status, backend, placed)
SELECT b.borrowernumber, br.branchcode, 'COMP', 'ReprintsDesk', NOW()
FROM borrowers b, branches br
LIMIT 1;

INSERT INTO action_logs (timestamp, user, module, action, object, info,
interface)
VALUES
 (NOW() - INTERVAL 2 HOUR, 1, 'ILL', 'INCDOCS_REQUEST_PLACED', 1,
  '{"log_origin":"IncDocs","response":1}', 'intranet'),
 (NOW() - INTERVAL 1 HOUR, 1, 'ILL', 'REPRINTS_DESK_REQUEST_ORDER_UPDATED', 1,
  '{"log_origin":"ReprintsDesk","response":null}', 'commandline');

3) Attempt to open the 'Manage request' page for this newly created
request:
http://localhost:8081/cgi-bin/koha/ill/ill-requests.pl?op=illview&illrequest_id=1

4) Notice you get a 500 error:
Template process failed: file error - : not found

5) Apply all patches, restart plack, refresh. Notice the 'Manage
request' page now renders correctly.

6) Click the 'ILL request log' toolbar button. Confirm that both the
IncDocs and ReprintsDesk entries are shown.

Signed-off-by: Hannah Prince <helm.consortium.nhs.net>

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