Failure Teaches Success

by Hiromu Shioya

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Failure Teaches Success 2014-07-17! System Lightning Talks Bar Vol.2! SHIOYA, Hiromu (@kwappa)

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Hello, World!

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kwappa SHIOYA Hiromu

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http://cookpad.com

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http://info.cookpad.com

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http://bit.ly/cookpadjobs

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Failure Teaches Success

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CASE 1 1998

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FLAG SHOULD NEVER COMPARE TO 1

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FOR EXAMPLE

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!!! BUG !!! item[42] # => 0

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!!! BUG !!! item[42] # => 1

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!!! BUG !!! item[42] # => 2

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!!! BUG !!! item[42] # => 3

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!!! BUG !!! item[42] # => 4

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!!! BUG !!! item[42] # => 5

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DEAD END

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BETTER ONE

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CASE 2 2008

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BOSS SHOULD NEVER DEPLOY

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NEW BOSS CAME AND TOLD US

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NEW BOSS CAME AND TOLD US I USED TO CODE, BUT I TOOK AN ARROW IN THE KNEE...

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OUR SYSTEM commit checkout rsync DEVELOPER SVN STAGING DEPLOY PRODUCTION

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HERE COMES THE BOSS rsync STAGING DEPLOY PRODUCTION

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HERE COMES THE BOSS login rsync STAGING DEPLOY PRODUCTION

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HERE COMES THE BOSS login rsync STAGING DEPLOY PRODUCTION $vi regist.php

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HERE COMES THE BOSS login rsync STAGING DEPLOY PRODUCTION $vi regist.php $rm regist.php

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HERE COMES THE BOSS login rsync STAGING DEPLOY PRODUCTION $vi regist.php $rm regist.php $svn hogehoge

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HERE COMES THE BOSS login rsync STAGING DEPLOY PRODUCTION $vi regist.php $rm regist.php $svn hogehoge $./deploy.sh

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CASE 3 2014

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ERRORS SHOULD NEVER PASS SILENTLY

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http://www.flickr.com/photos/chrisdonia/3460805358/

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http://www.flickr.com/photos/chrisdonia/3460805358/ ʊਓਓਓਓਓਓਓਓਓਓਓਓਓਓʊ ʼ 500 ʻ ʼ INTERNAL SERVER ERROR ʻ ʉY^Y^Y^Y^Y^Y^Y^Y^Y^Y^Y^Y^Yʉ

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OAuth2::Response#parsed # => nil

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https://github.com/intridea/oauth2/commit/ 56f9758d961fc317a05b2f93fd039588967a84b1

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WHY DID IT WORK? multi_xml oauth2 requires

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WHY DID IT WORK? multi_xml httparty oauth2 requires depends

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WHY DID IT WORK? aws-sdk-ruby multi_xml httparty oauth2 requires depends depends

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WHY DID IT BRAKE?

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WHY DID IT BRAKE? Gemﬁle

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WHY DID IT BRAKE? Gemﬁle.lock Gemﬁle

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https://github.com/aws/aws-sdk-ruby/commit/ c25952ed50d568172de6eb1756525a35eeb2fa77

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WHY DID IT BREAK? aws-sdk-ruby multi_xml httparty oauth2 requires depends depends

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WHY DID IT BREAK? aws-sdk-ruby multi_xml httparty oauth2 requires depends

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WHY DID IT BREAK? aws-sdk-ruby multi_xml oauth2 requires

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WHY DID IT BREAK? aws-sdk-ruby oauth2 requires

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WHY DID IT BREAK? aws-sdk-ruby oauth2 requires ʊਓਓਓਓਓਓਓਓਓਓਓਓਓਓʊ ʼ 500 ʻ ʼ INTERNAL SERVER ERROR ʻ ʉY^Y^Y^Y^Y^Y^Y^Y^Y^Y^Y^Y^Yʉ

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CONCLUSION

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FLAG SHOULD NEVER COMPARE TO 1

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FLAG SHOULD NEVER COMPARE TO 1 BOSS SHOULD NEVER DEPLOY

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FLAG SHOULD NEVER COMPARE TO 1 BOSS SHOULD NEVER DEPLOY ERRORS SHOULD NEVER PASS SILENTLY

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Failure Teaches Success SHARE YOUR FAILURES!!! THANK YOU FOR LISTENING