Improve setup and shutdown of periodic_updater#4737
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Puma shutdown can race with background metrics TimerTasks, which can lead to non-deterministic termination of threads (including database connections). Use 'kill' instead of 'shutdown' to dismiss already enqueued tasks while still allowing in-progress tasks to complete. Then call 'wait_for_termination' with a timeout of 1 second and return 'true' only if all tasks terminated successfully. This enables accurate logging (Successfully stopped periodic updates vs. Failed to stop all periodic update tasks). Instead of calling all 'update_*' methods explicitly in the beginning, configure TimerTasks with 'run_now: true'. Also set 'interval_type: :fixed_rate' so execution timing is deterministic and independent of task duration.
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Changes in cloud_controller_ng:
- Improve setup and shutdown of periodic_updater
PR: cloudfoundry/cloud_controller_ng#4737
Author: Philipp Thun <philipp.thun@sap.com>
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Puma shutdown can race with background metrics
TimerTasks, which can lead to non-deterministic termination of threads (including database connections).Use
killinstead ofshutdownto dismiss already enqueued tasks while still allowing in-progress tasks to complete. Then callwait_for_terminationwith a timeout of 1 second and returntrueonly if all tasks terminated successfully. This enables accurate logging (Successfully stopped periodic updatesvs.Failed to stop all periodic update tasks).Instead of calling all
update_*methods explicitly in the beginning, configureTimerTasks withrun_now: true. Also setinterval_type: :fixed_rateso execution timing is deterministic and independent of task duration.I have reviewed the contributing guide
I have viewed, signed, and submitted the Contributor License Agreement
I have made this pull request to the
mainbranchI have run all the unit tests using
bundle exec rakeI have run CF Acceptance Tests