Timeout while searching messages with high date range on some topics

[erolkskn]

Problem

I was working on an experimental alternative architecture for fedbadges but I stumbled upon in this issue. It seems like datanommer/datagrepper fails to bring back old messages from database in some topics.

For example while this endpoint simply just works for the bodhi.update.comment

# example with httpie:
http get https://apps.fedoraproject.org/datagrepper/v2/search start==2015-01-01T00:00:00Z rows_per_page==100 topic==org.fedoraproject.prod.bodhi.update.comment 

It doesn't work for topics like askbot.post.edit or ansible.playbook.complete

# askbot.post.edit example with httpie:
http get https://apps.fedoraproject.org/datagrepper/v2/search start==2015-01-01T00:00:00Z rows_per_page==100 topic==org.fedoraproject.prod.askbot.post.edit

# ansible.playbook.complete example with httpie:
http get https://apps.fedoraproject.org/datagrepper/v2/search start==2015-01-01T00:00:00Z rows_per_page==100 topic==org.fedoraproject.prod.ansible.playbook.complete

Even if it works for these topics, it just happens after trying to search them (and get 502 error) couple of times.

It should be also noted that I didn't include any user on the search criteria.