[SERVER-42195] Stepdown suites fail with Python exception when run with --repeat >1 - MongoDB Jira

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Backwards Compatibility:
Fully Compatible
Operating System:
ALL
Backport Requested:

v4.2, v4.0
Steps To Reproduce:
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python buildscripts/resmoke.py --suite=replica_sets_kill_primary_jscore_passthrough jstests/core/indexc.js --repeat=2
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python buildscripts/resmoke.py --suite=replica_sets_kill_primary_jscore_passthrough jstests/core/indexc.js --repeat=2
Sprint:
STM 2019-07-29
Linked BF Score:
18
Story Points:
1

We're attempting to use the same FlagBasedStepdownLifecycle instance across executions of the test suite. This would mean FlagBasedStepdownLifecycle.__should_stop == True the moment the second execution of the test suite begins. We should instead construct a new FlagBasedStepdownLifecycle instance when constructing a new _StepdownThread instance.

[executor] 2019-07-12T00:12:46.427-0400 Summary: All 5 test(s) passed in 10.96 seconds.

[ContinuousStepdown:job0] Starting the stepdown thread.

[ContinuousStepdown:job0] The stepdown thread is not running.

[executor:js_test:job0] 2019-07-12T00:12:46.429-0400 JSTest jstests/core/indexc.js marked as a failure by a hook's before_test.

Traceback (most recent call last):

  File "/Users/maxh/debugging/mongo/buildscripts/resmokelib/testing/job.py", line 242, in _run_hooks_before_tests

    self._run_hook(hook, hook.before_test, test)

  File "/Users/maxh/debugging/mongo/buildscripts/resmokelib/testing/job.py", line 228, in _run_hook

    hook_function(test, self.report)

  File "/Users/maxh/debugging/mongo/buildscripts/resmokelib/testing/hooks/stepdown.py", line 97, in before_test

    self._check_thread()

  File "/Users/maxh/debugging/mongo/buildscripts/resmokelib/testing/hooks/stepdown.py", line 113, in _check_thread

    raise errors.ServerFailure(msg)

buildscripts.resmokelib.errors.ServerFailure: The stepdown thread is not running.

is caused by

SERVER-41096 ContinuousStepdown thread and resmoke runner do not synchronize properly on the "stepdown permitted file" and "stepping down file"