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Test failure "all pooled connections were in use (ActiveRecord::ConnectionTimeoutError)” on Rails7



I am trying to troubleshoot the following bug in ruby-with-advisory-lock.


https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1095888


The test is failing with because of a connection timeout.


ParallelismTest#test_doesn't_create_multiple_duplicate_rows_with_advisory_locks = #<Thread:0x00007f0594867270 /builds/ruby-team/ruby-with-advisory-lock/debian/output/source_dir/test/parallelism_test.rb:13 run> terminated with exception (report_on_exception is true):

/usr/share/rubygems-integration/all/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/connection_pool/queue.rb:128:in `block in wait_poll': could not obtain a connection from the pool within 5.000 seconds (waited 5.000 seconds); all pooled connections were in use (ActiveRecord::ConnectionTimeoutError)


https://salsa.debian.org/ruby-team/ruby-with-advisory-lock/-/jobs/7214292#L1668


The test succeeded on Rails 6.


Does anyone know off the top of their head what might have changed in Rails 7 that would cause this timeout?


The error message feels like some type of problem/incompatibility in the testing environment as opposed to an actual problem ruby-with-advisory-lock would encounter running on Rails 7 in the real world.  If that is the case, I can simply disable the test (at least temporarily).  But I don’t want to do that if this is an actual problem that would manifest in a production environment.


--

Soren Stoutner

soren@debian.org

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