| class Config | |
| CONSTANT = 1 | |
| def CONSTANT=(val) | |
| fail | |
| end | |
| end | |
| config = Config.new | |
| config.CONSTANT = 2 |
| $ logstash -f samples/tcp.conf | |
| Settings: Default pipeline workers: 8 | |
| Pipeline main started | |
| {"message":"\"2017-04-28T22:44:30.424-07:00\"","@timestamp":"2017-04-29T05:44:30.424Z","@version":"1","severity":"INFO","host":"Davids-MacBook-Pro-6.local","port":62671} | |
| {"message":"\"2017-04-28T22:44:30.528-07:00\"","@timestamp":"2017-04-29T05:44:30.528Z","@version":"1","severity":"INFO","host":"Davids-MacBook-Pro-6.local","port":62671} | |
| {"message":"\"2017-04-28T22:44:30.633-07:00\"","@timestamp":"2017-04-29T05:44:30.633Z","@version":"1","severity":"INFO","host":"Davids-MacBook-Pro-6.local","port":62671} | |
| {"message":"\"2017-04-28T22:44:30.737-07:00\"","@timestamp":"2017-04-29T05:44:30.737Z","@version":"1","severity":"INFO","host":"Davids-MacBook-Pro-6.local","port":62671} | |
| {"message":"\"2017-04-28T22:44:30.842-07:00\"","@timestamp":"2017-04-29T05:44:30.842Z","@version":"1","severity":"INFO","host":"Davids-MacBook-Pro-6.local","port":62671} | |
| {"message":"\"2017-04-28T22:44:30.947-07:00\"","@timestamp":"2017-04-29T05:44:30.9 |
| namespace :sync do | |
| desc "Run production sync" | |
| task run: [ | |
| :set_app, | |
| :maint_on, | |
| :scale_down, | |
| :cancel_backup, | |
| :delete_database, | |
| :create_production_fork, | |
| :migrate, |
Written by David. Much thanks to Lukasz for technical and moral support, and helping me grep the Papertrail logs.
All times are in EST.
Heroku PGBackups was running during a database migration, and was unexpectedly holding a lock. Postgres stopped serving any queries until the backup was canceled.
"Bob" (backend engineer) was the developer on call during this incident. All names have been changed to protect the innocent. :)
Bad code which prevented server startup was deployed to production. It had not been manually tested in a dev environment, but had passed all unit and
| CLEANUP_THRESHOLD = 250 * 1_024_000 # 250 megabytes | |
| # See https://robots.thoughtbot.com/how-to-reduce-a-large-heroku-compiled-slug-size | |
| desc "Clean up the Heroku repo to reduce compiled slug size" | |
| task cleanup: :set_app do | |
| force = ENV.fetch('FORCE_CLEANUP', false) | |
| if force || slug_size > CLEANUP_THRESHOLD | |
| puts "Heroku compiled slug size exceeds 250 MB. Cleaning up the Heroku repo." | |
| install_heroku_plugin('heroku-repo') | |
| _execute heroku_command("repo:gc") |
| # Tested in Ruby 1.8.7 | |
| class ParentClass | |
| def call_private_good | |
| # Private methods can only be called without an explicit receiver | |
| private_test | |
| end | |
| def call_private_bad | |
| # Calling a private method with an explicit receiver (self) will fail |