Redmine

From version 4.0.0 to v4.0.3,the issue always exist.

this look like the same issue i reported a few weeks ago

https://www.redmine.org/issues/31241

Could you paste the environment information? You can find it on admin/info page.

Go MAEDA wrote:

Could you paste the environment information? You can find it on admin/info page.

Information

Redmine 4.0.3.stable

Default administrator account changed
Attachments directory writable
Plugin assets directory writable (./public/plugin_assets)
RMagick available (optional)
ImageMagick convert available (optional)

Environment:
  Redmine version                4.0.3.stable
  Ruby version                   2.6.0-p0 (2018-12-25) [x86_64-linux]
  Rails version                  5.2.2.1
  Environment                    production
  Database adapter               Mysql2
  Mailer queue                   ActiveJob::QueueAdapters::AsyncAdapter
  Mailer delivery                smtp
SCM:
  Subversion                     1.7.14
  Git                            1.8.3.1
  Filesystem                     
Redmine plugins:
  no plugin installed

It sound the same issue of #32314 where I have detected the magic number equals to 30

Have you solved this problem？ I have the same problem when I use:

Completed 500 Internal Server Error in 5004ms (ActiveRecord: 0.0ms)

ActiveRecord::ConnectionTimeoutError (could not obtain a connection from the pool within 5.000 seconds (waited 5.003 seconds); all pooled connections were in use):

i have no solution; but instead, i have changed the 500 page to read: "sorry, server is overloaded - please wait while we reconnect you ..."; and added a meta-refresh - it is super tacky; but it has stopped the complaints for now

FWIW - i just noticed this ticket is categorized as "Email notifications"; while my ticket #31241 is categorized "Database" - these are almost certainly duplicates though