rails-segmentation-fault-using-mongoid

tail -f log/puma.stderr.log
していたらpumaのlogで下記落ちていた.

(解決策)
It seems like a bug in MRI 2.4. Follow these threads here and here
Thanks! Updating to 2.4.1 solved the problem in my case. – dusan Nov 16 '17 at 13:59

https://stackoverflow.com/questions/46120738/rails-segmentation-fault-using-mongoid
https://jira.mongodb.org/browse/RUBY-1202
https://jira.mongodb.org/browse/RUBY-1231
https://jira.mongodb.org/browse/RUBY-1194

=== puma startup: 2018-10-09 12:30:30 +0900 ===
/home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/2.4.0/forwardable.rb:228: [BUG] Segmentation fault at 0x00000000000038
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]

• • Control frame information -----------------------------------------------

c:0091 p:0045 s:0621 e:000618 METHOD /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/2.4.0/forwardable.rb:228
c:0090 p:0038 s:0612 E:000b48 BLOCK /home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mongo-2.4.3/lib/mongo/server/connection.rb:209 [FINISH]
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c:0001 p:---- s:0003 e:000002 (none) [FINISH]

• • Ruby level backtrace information ----------------------------------------

/home/ubuntu/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/puma-3.10.0/lib/puma/thread_pool.rb:120:in `block in spawn_thread'