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Fix #8952: Exceptions raised in a Directive cause parallel builds to hang #8957

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merged 1 commit into from
Mar 6, 2021
Merged

Fix #8952: Exceptions raised in a Directive cause parallel builds to hang #8957

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2 changes: 2 additions & 0 deletions CHANGES
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,8 @@ Features added
Bugs fixed
----------

* #8952: Exceptions raised in a Directive cause parallel builds to hang

Testing
--------

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17 changes: 15 additions & 2 deletions sphinx/util/parallel.py
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Original file line number Diff line number Diff line change
Expand Up @@ -103,8 +103,21 @@ def add_task(self, task_func: Callable, arg: Any = None, result_func: Callable =
self._join_one()

def join(self) -> None:
while self._pworking:
self._join_one()
try:
while self._pworking:
self._join_one()
except Exception:
# shutdown other child processes on failure
self.terminate()
raise

def terminate(self) -> None:
for tid in list(self._precvs):
self._procs[tid].terminate()
self._result_funcs.pop(tid)
self._procs.pop(tid)
self._precvs.pop(tid)
self._pworking -= 1

def _join_one(self) -> None:
for tid, pipe in self._precvs.items():
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