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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
# This file is called from a test in test_pandas.py.
from concurrent.futures import ThreadPoolExecutor
import faulthandler
import sys
import pyarrow as pa
num_threads = 60
timeout = 10 # seconds
def thread_func(i):
pa.array([i]).to_pandas()
def main():
# In case of import deadlock, crash after a finite timeout
faulthandler.dump_traceback_later(timeout, exit=True)
with ThreadPoolExecutor(num_threads) as pool:
assert "pandas" not in sys.modules # pandas is imported lazily
list(pool.map(thread_func, range(num_threads)))
assert "pandas" in sys.modules
if __name__ == "__main__":
main()
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