[Koha-bugs] [Bug 35111] Background jobs worker crashes on SIGPIPE when database connection lost in Ubuntu 22.04

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=35111

--- Comment #5 from David Cook <dcook at prosentient.com.au> ---
Created attachment 157484
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=157484&action=edit
Bug 35111: Ignore SIGPIPE in background jobs worker

This change explicitly ignores SIGPIPE signals in the background jobs
worker.

Daemons like Starman ignore SIGPIPE so it makes sense to explicitly set this.
Differences in the inner workings of MySQL vs MariaDB client libraries have
yielded
different behaviours in automatic reconnections and potentially SIGPIPE
handling,
so this helps to make the overall behaviour more consistent.

Test plan:
0. Apply patch and run "restart_all"
1. Go to http://localhost:8081/cgi-bin/koha/catalogue/detail.pl?biblionumber=29
2. Click "Save" > "MARCXML"
3. Go to http://localhost:8081/cgi-bin/koha/tools/stage-marc-import.pl
4. Click "Choose file", choose the MARCXML file, click "Upload file"
5. Click "Stage for import"
6. Note the job is marked as "100% Finished"

7. In a separate window run "docker restart koha-db-1"
8. Repeat steps 3-5 for uploading file and running stage for import
9. Note that the job is marked as "100% Finished" as you'd expect

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