amoeba commented on issue #40410:
URL: https://github.com/apache/arrow/issues/40410#issuecomment-2369768235
I think I was able to reproduce the hang this morning and I collected 6
backtraces spread out of 1-2min that were all essentially identical:
<details>
<summary>bt all output</summary>
```sh
(lldb) bt all
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
* frame #0: 0x000000019213bee8 libsystem_kernel.dylib`__select + 8
frame #1: 0x00000001a9c3cc64 libcurl.4.dylib`Curl_poll + 516
frame #2: 0x00000001a9c3501c libcurl.4.dylib`multi_wait + 640
frame #3: 0x00000001a9c0eda8 libcurl.4.dylib`curl_easy_perform + 268
frame #4: 0x0000000105b7f720
libaws-cpp-sdk-core.dylib`Aws::Http::CurlHttpClient::MakeRequest(std::__1::shared_ptr<Aws::Http::HttpRequest>
const&, Aws::Utils::RateLimits::RateLimiterInterface*,
Aws::Utils::RateLimits::RateLimiterInterface*) const + 3524
frame #5: 0x0000000105b425a8
libaws-cpp-sdk-core.dylib`std::__1::shared_ptr<Aws::Http::HttpResponse>
smithy::components::tracing::TracingUtils::MakeCallWithTiming<std::__1::shared_ptr<Aws::Http::HttpResponse>>(std::__1::function<std::__1::shared_ptr<Aws::Http::HttpResponse>
()>, std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char>> const&, smithy::components::tracing::Meter const&,
std::__1::map<std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char>>, std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char>>,
std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char>>>,
std::__1::allocator<std::__1::pair<std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char>> const,
std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char>>>>>&&, std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::a
llocator<char>> const&) + 84
frame #6: 0x0000000105b4e24c
libaws-cpp-sdk-core.dylib`Aws::Client::AWSClient::AttemptOneRequest(std::__1::shared_ptr<Aws::Http::HttpRequest>
const&, Aws::AmazonWebServiceRequest const&, char const*, char const*, char
const*) const + 1772
frame #7: 0x0000000105b4c3e8
libaws-cpp-sdk-core.dylib`Aws::Client::AWSClient::AttemptExhaustively(Aws::Http::URI
const&, Aws::AmazonWebServiceRequest const&, Aws::Http::HttpMethod, char
const*, char const*, char const*) const + 948
frame #8: 0x0000000105b55a0c
libaws-cpp-sdk-core.dylib`Aws::Client::AWSXMLClient::MakeRequest(Aws::Http::URI
const&, Aws::AmazonWebServiceRequest const&, Aws::Http::HttpMethod, char
const*, char const*, char const*) const + 64
frame #9: 0x0000000105eec284
libaws-cpp-sdk-s3.dylib`std::__1::__function::__func<Aws::S3::S3Client::PutObject(Aws::S3::Model::PutObjectRequest
const&) const::$_105,
std::__1::allocator<Aws::S3::S3Client::PutObject(Aws::S3::Model::PutObjectRequest
const&) const::$_105>, Aws::Utils::Outcome<Aws::S3::Model::PutObjectResult,
Aws::S3::S3Error> ()>::operator()() + 1624
frame #10: 0x0000000105e94050
libaws-cpp-sdk-s3.dylib`Aws::Utils::Outcome<Aws::S3::Model::PutObjectResult,
Aws::S3::S3Error>
smithy::components::tracing::TracingUtils::MakeCallWithTiming<Aws::Utils::Outcome<Aws::S3::Model::PutObjectResult,
Aws::S3::S3Error>>(std::__1::function<Aws::Utils::Outcome<Aws::S3::Model::PutObjectResult,
Aws::S3::S3Error> ()>, std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char>> const&,
smithy::components::tracing::Meter const&,
std::__1::map<std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char>>, std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char>>,
std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char>>>,
std::__1::allocator<std::__1::pair<std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char>> const,
std::__1::basic_string<char, std::__1::char_traits<char>,
std::__1::allocator<char>>>>
>&&, std::__1::basic_string<char, std::__1::char_traits<char>,
>std::__1::allocator<char>> const&) + 84
frame #11: 0x0000000105e936c0
libaws-cpp-sdk-s3.dylib`Aws::S3::S3Client::PutObject(Aws::S3::Model::PutObjectRequest
const&) const + 1512
frame #12: 0x0000000110ef0060
libarrow.1800.dylib`arrow::fs::S3FileSystem::Impl::CreateEmptyDir(std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char>> const&,
std::__1::basic_string_view<char, std::__1::char_traits<char>>) + 524
frame #13: 0x0000000110eeecf4
libarrow.1800.dylib`arrow::fs::S3FileSystem::CreateDir(std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char>> const&, bool) + 1820
frame #14: 0x00000001046e0a30
arrow-s3fs-test`arrow::fs::FileSystem::CreateDir(std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char>> const&) + 56
frame #15: 0x00000001046e349c
arrow-s3fs-test`arrow::fs::TestS3FS_CreateDir_Test::TestBody() + 4432
frame #16: 0x00000001060dfad8 libarrow_gtestd.1.11.0.dylib`void
testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test,
void>(testing::Test*, void (testing::Test::*)(), char const*) + 132
frame #17: 0x000000010609d8b8 libarrow_gtestd.1.11.0.dylib`void
testing::internal::HandleExceptionsInMethodIfSupported<testing::Test,
void>(testing::Test*, void (testing::Test::*)(), char const*) + 96
frame #18: 0x000000010609d808
libarrow_gtestd.1.11.0.dylib`testing::Test::Run() + 192
frame #19: 0x000000010609e8ac
libarrow_gtestd.1.11.0.dylib`testing::TestInfo::Run() + 244
frame #20: 0x000000010609f99c
libarrow_gtestd.1.11.0.dylib`testing::TestSuite::Run() + 276
frame #21: 0x00000001060ad70c
libarrow_gtestd.1.11.0.dylib`testing::internal::UnitTestImpl::RunAllTests() +
1008
frame #22: 0x00000001060e6d6c libarrow_gtestd.1.11.0.dylib`bool
testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl,
bool>(testing::internal::UnitTestImpl*, bool
(testing::internal::UnitTestImpl::*)(), char const*) + 132
frame #23: 0x00000001060ad0e0 libarrow_gtestd.1.11.0.dylib`bool
testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl,
bool>(testing::internal::UnitTestImpl*, bool
(testing::internal::UnitTestImpl::*)(), char const*) + 96
frame #24: 0x00000001060acfcc
libarrow_gtestd.1.11.0.dylib`testing::UnitTest::Run() + 216
frame #25: 0x0000000104dabef0
libarrow_gtest_maind.1.11.0.dylib`RUN_ALL_TESTS() + 16
frame #26: 0x0000000104dabed4 libarrow_gtest_maind.1.11.0.dylib`main + 76
frame #27: 0x0000000191de7154 dyld`start + 2476
thread #2
frame #0: 0x0000000192132aa4 libsystem_kernel.dylib`__workq_kernreturn +
8
thread #3, name = 'AwsEventLoop 1'
frame #0: 0x0000000192136f40 libsystem_kernel.dylib`kevent + 8
frame #1: 0x0000000105cea0d4
libaws-c-io.1.0.0.dylib`aws_event_loop_thread + 412
frame #2: 0x0000000105d4cd18 libaws-c-common.1.dylib`thread_fn + 340
frame #3: 0x0000000192171f94 libsystem_pthread.dylib`_pthread_start + 136
thread #4
frame #0: 0x00000001921345ec libsystem_kernel.dylib`__psynch_cvwait + 8
frame #1: 0x000000019217255c libsystem_pthread.dylib`_pthread_cond_wait
+ 1228
frame #2: 0x0000000192097b14
libc++.1.dylib`std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)
+ 28
frame #3: 0x000000011135129c
libarrow.1800.dylib`arrow::internal::WorkerLoop(std::__1::shared_ptr<arrow::internal::ThreadPool::State>,
std::__1::__list_iterator<std::__1::thread, void*>) + 1040
frame #4: 0x0000000111350e54
libarrow.1800.dylib`arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6::operator()()
const + 88
frame #5: 0x0000000111350dc8
libarrow.1800.dylib`decltype(std::declval<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>()())
std::__1::__invoke[abi:ue170006]<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6&&)
+ 24
frame #6: 0x0000000111350da4 libarrow.1800.dylib`void
std::__1::__thread_execute[abi:ue170006]<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>&,
std::__1::__tuple_indices<>) + 28
frame #7: 0x0000000111350a1c libarrow.1800.dylib`void*
std::__1::__thread_proxy[abi:ue170006]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>>(void*) + 84
frame #8: 0x0000000192171f94 libsystem_pthread.dylib`_pthread_start + 136
thread #5
frame #0: 0x00000001921345ec libsystem_kernel.dylib`__psynch_cvwait + 8
frame #1: 0x000000019217255c libsystem_pthread.dylib`_pthread_cond_wait
+ 1228
frame #2: 0x0000000192097b14
libc++.1.dylib`std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)
+ 28
frame #3: 0x000000011135129c
libarrow.1800.dylib`arrow::internal::WorkerLoop(std::__1::shared_ptr<arrow::internal::ThreadPool::State>,
std::__1::__list_iterator<std::__1::thread, void*>) + 1040
frame #4: 0x0000000111350e54
libarrow.1800.dylib`arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6::operator()()
const + 88
frame #5: 0x0000000111350dc8
libarrow.1800.dylib`decltype(std::declval<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>()())
std::__1::__invoke[abi:ue170006]<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6&&)
+ 24
frame #6: 0x0000000111350da4 libarrow.1800.dylib`void
std::__1::__thread_execute[abi:ue170006]<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>&,
std::__1::__tuple_indices<>) + 28
frame #7: 0x0000000111350a1c libarrow.1800.dylib`void*
std::__1::__thread_proxy[abi:ue170006]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>>(void*) + 84
frame #8: 0x0000000192171f94 libsystem_pthread.dylib`_pthread_start + 136
thread #6
frame #0: 0x00000001921345ec libsystem_kernel.dylib`__psynch_cvwait + 8
frame #1: 0x000000019217255c libsystem_pthread.dylib`_pthread_cond_wait
+ 1228
frame #2: 0x0000000192097b14
libc++.1.dylib`std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)
+ 28
frame #3: 0x000000011135129c
libarrow.1800.dylib`arrow::internal::WorkerLoop(std::__1::shared_ptr<arrow::internal::ThreadPool::State>,
std::__1::__list_iterator<std::__1::thread, void*>) + 1040
frame #4: 0x0000000111350e54
libarrow.1800.dylib`arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6::operator()()
const + 88
frame #5: 0x0000000111350dc8
libarrow.1800.dylib`decltype(std::declval<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>()())
std::__1::__invoke[abi:ue170006]<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6&&)
+ 24
frame #6: 0x0000000111350da4 libarrow.1800.dylib`void
std::__1::__thread_execute[abi:ue170006]<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>&,
std::__1::__tuple_indices<>) + 28
frame #7: 0x0000000111350a1c libarrow.1800.dylib`void*
std::__1::__thread_proxy[abi:ue170006]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>>(void*) + 84
frame #8: 0x0000000192171f94 libsystem_pthread.dylib`_pthread_start + 136
thread #7
frame #0: 0x00000001921345ec libsystem_kernel.dylib`__psynch_cvwait + 8
frame #1: 0x000000019217255c libsystem_pthread.dylib`_pthread_cond_wait
+ 1228
frame #2: 0x0000000192097b14
libc++.1.dylib`std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)
+ 28
frame #3: 0x000000011135129c
libarrow.1800.dylib`arrow::internal::WorkerLoop(std::__1::shared_ptr<arrow::internal::ThreadPool::State>,
std::__1::__list_iterator<std::__1::thread, void*>) + 1040
frame #4: 0x0000000111350e54
libarrow.1800.dylib`arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6::operator()()
const + 88
frame #5: 0x0000000111350dc8
libarrow.1800.dylib`decltype(std::declval<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>()())
std::__1::__invoke[abi:ue170006]<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6&&)
+ 24
frame #6: 0x0000000111350da4 libarrow.1800.dylib`void
std::__1::__thread_execute[abi:ue170006]<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>&,
std::__1::__tuple_indices<>) + 28
frame #7: 0x0000000111350a1c libarrow.1800.dylib`void*
std::__1::__thread_proxy[abi:ue170006]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>>(void*) + 84
frame #8: 0x0000000192171f94 libsystem_pthread.dylib`_pthread_start + 136
thread #8
frame #0: 0x00000001921345ec libsystem_kernel.dylib`__psynch_cvwait + 8
frame #1: 0x000000019217255c libsystem_pthread.dylib`_pthread_cond_wait
+ 1228
frame #2: 0x0000000192097b14
libc++.1.dylib`std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)
+ 28
frame #3: 0x000000011135129c
libarrow.1800.dylib`arrow::internal::WorkerLoop(std::__1::shared_ptr<arrow::internal::ThreadPool::State>,
std::__1::__list_iterator<std::__1::thread, void*>) + 1040
frame #4: 0x0000000111350e54
libarrow.1800.dylib`arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6::operator()()
const + 88
frame #5: 0x0000000111350dc8
libarrow.1800.dylib`decltype(std::declval<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>()())
std::__1::__invoke[abi:ue170006]<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6&&)
+ 24
frame #6: 0x0000000111350da4 libarrow.1800.dylib`void
std::__1::__thread_execute[abi:ue170006]<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>&,
std::__1::__tuple_indices<>) + 28
frame #7: 0x0000000111350a1c libarrow.1800.dylib`void*
std::__1::__thread_proxy[abi:ue170006]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>>(void*) + 84
frame #8: 0x0000000192171f94 libsystem_pthread.dylib`_pthread_start + 136
thread #9
frame #0: 0x00000001921345ec libsystem_kernel.dylib`__psynch_cvwait + 8
frame #1: 0x000000019217255c libsystem_pthread.dylib`_pthread_cond_wait
+ 1228
frame #2: 0x0000000192097b14
libc++.1.dylib`std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)
+ 28
frame #3: 0x000000011135129c
libarrow.1800.dylib`arrow::internal::WorkerLoop(std::__1::shared_ptr<arrow::internal::ThreadPool::State>,
std::__1::__list_iterator<std::__1::thread, void*>) + 1040
frame #4: 0x0000000111350e54
libarrow.1800.dylib`arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6::operator()()
const + 88
frame #5: 0x0000000111350dc8
libarrow.1800.dylib`decltype(std::declval<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>()())
std::__1::__invoke[abi:ue170006]<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6&&)
+ 24
frame #6: 0x0000000111350da4 libarrow.1800.dylib`void
std::__1::__thread_execute[abi:ue170006]<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>&,
std::__1::__tuple_indices<>) + 28
frame #7: 0x0000000111350a1c libarrow.1800.dylib`void*
std::__1::__thread_proxy[abi:ue170006]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>>(void*) + 84
frame #8: 0x0000000192171f94 libsystem_pthread.dylib`_pthread_start + 136
thread #10
frame #0: 0x00000001921345ec libsystem_kernel.dylib`__psynch_cvwait + 8
frame #1: 0x000000019217255c libsystem_pthread.dylib`_pthread_cond_wait
+ 1228
frame #2: 0x0000000192097b14
libc++.1.dylib`std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)
+ 28
frame #3: 0x000000011135129c
libarrow.1800.dylib`arrow::internal::WorkerLoop(std::__1::shared_ptr<arrow::internal::ThreadPool::State>,
std::__1::__list_iterator<std::__1::thread, void*>) + 1040
frame #4: 0x0000000111350e54
libarrow.1800.dylib`arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6::operator()()
const + 88
frame #5: 0x0000000111350dc8
libarrow.1800.dylib`decltype(std::declval<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>()())
std::__1::__invoke[abi:ue170006]<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6&&)
+ 24
frame #6: 0x0000000111350da4 libarrow.1800.dylib`void
std::__1::__thread_execute[abi:ue170006]<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>&,
std::__1::__tuple_indices<>) + 28
frame #7: 0x0000000111350a1c libarrow.1800.dylib`void*
std::__1::__thread_proxy[abi:ue170006]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>>(void*) + 84
frame #8: 0x0000000192171f94 libsystem_pthread.dylib`_pthread_start + 136
thread #11
frame #0: 0x00000001921345ec libsystem_kernel.dylib`__psynch_cvwait + 8
frame #1: 0x000000019217255c libsystem_pthread.dylib`_pthread_cond_wait
+ 1228
frame #2: 0x0000000192097b14
libc++.1.dylib`std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)
+ 28
frame #3: 0x000000011135129c
libarrow.1800.dylib`arrow::internal::WorkerLoop(std::__1::shared_ptr<arrow::internal::ThreadPool::State>,
std::__1::__list_iterator<std::__1::thread, void*>) + 1040
frame #4: 0x0000000111350e54
libarrow.1800.dylib`arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6::operator()()
const + 88
frame #5: 0x0000000111350dc8
libarrow.1800.dylib`decltype(std::declval<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>()())
std::__1::__invoke[abi:ue170006]<arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6&&)
+ 24
frame #6: 0x0000000111350da4 libarrow.1800.dylib`void
std::__1::__thread_execute[abi:ue170006]<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>&,
std::__1::__tuple_indices<>) + 28
frame #7: 0x0000000111350a1c libarrow.1800.dylib`void*
std::__1::__thread_proxy[abi:ue170006]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct,
std::__1::default_delete<std::__1::__thread_struct>>,
arrow::internal::ThreadPool::LaunchWorkersUnlocked(int)::$_6>>(void*) + 84
frame #8: 0x0000000192171f94 libsystem_pthread.dylib`_pthread_start + 136
(lldb)
```
</details>
This trace is sufficiently different from the [previous
one](https://github.com/apache/arrow/issues/40410#issuecomment-1998656359) that
I'm going to try to capture another trace later today. The earlier trace was in
a different test and stuck on a different syscall. Will report back.
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