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Type:
Task
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: Sharding
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Fully Compatible
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Sharding 2020-12-28
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45
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1
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None
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3
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ReshardingOplogApplierTest fixture's way of shutting down ThreadPool inexplicably throws a std::exception (EDEADLK) when attempting to reacquire _mutex after having successfully joined all of the threads. As another way of illustrating this issue, the second of the invariants in the diff below fails sometimes when ReshardingOplogApplierTest::tearDown() is called.
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diff --git a/src/mongo/util/concurrency/thread_pool.cpp b/src/mongo/util/concurrency/thread_pool.cpp
index d333a82d12..b115b33033 100644
--- a/src/mongo/util/concurrency/thread_pool.cpp
+++ b/src/mongo/util/concurrency/thread_pool.cpp
@@ -307,9 +307,11 @@ void ThreadPool::Impl::_join_inlock(stdx::unique_lock<Latch>* lk) {
_joinRetired_inlock();
auto threadsToJoin = std::exchange(_threads, {});
lk->unlock();
+ invariant(!lk->owns_lock());
for (auto& t : threadsToJoin) {
t.join();
}
+ invariant(!lk->owns_lock());
lk->lock();
invariant(_state == joining);
_setState_inlock(shutdownComplete);
- is related to
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SERVER-53011 ReshardingOplogApplierTest should gracefully tearDown test resources that it creates
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- Closed
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