Hi!
Today I spent some time trying to come up with a generic solution to retry all queries in the application. And it’s possible, but as it will require too many workarounds, the code won’t be approved 
So, let’s try to first increase the number of retries for the jobs (if you add .diff to the end of the links, GitHub will generate a diff file):
OJS Used default number of retries (3x) · jonasraoni/ojs@87944be · GitHub
/lib/pkp Used default number of retries (3x) · jonasraoni/pkp-lib@062f9b8 · GitHub
Maybe it will be enough! If not, I can add deadlock measures to this part of the code.
Best,
Jonas Raoni