Erik Montnemery eb3458a3d2
Add MutexPool for recorder tests (#69410)
* Add MutexPool for recorder tests

* Fix get_schema_version

* Update test test_last_run_was_recently_clean

* Update test test_shutdown_before_startup_finishes

* Revert comments in test_write_lock_db

* Make the MutexPool lock a class variable

* Remove stale comment

* Move MutexPool

* Tweak debug prints
2022-04-12 07:41:46 -10:00
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