Coverage for pyspark/tests/test_daemon.py : 98%

# 

# 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. 

# 

import os 

import sys 

import time 

import unittest 

from pyspark.serializers import read_int 

class DaemonTests(unittest.TestCase): 

def connect(self, port): 

from socket import socket, AF_INET, SOCK_STREAM 

sock = socket(AF_INET, SOCK_STREAM) 

sock.connect(('127.0.0.1', port)) 

# send a split index of -1 to shutdown the worker 

sock.send(b"\xFF\xFF\xFF\xFF") 

sock.close() 

return True 

def do_termination_test(self, terminator): 

from subprocess import Popen, PIPE 

from errno import ECONNREFUSED 

# start daemon 

daemon_path = os.path.join(os.path.dirname(__file__), "..", "daemon.py") 

python_exec = sys.executable or os.environ.get("PYSPARK_PYTHON") 

daemon = Popen([python_exec, daemon_path], stdin=PIPE, stdout=PIPE) 

# read the port number 

port = read_int(daemon.stdout) 

# daemon should accept connections 

self.assertTrue(self.connect(port)) 

# wait worker process spawned from daemon exit. 

time.sleep(1) 

# request shutdown 

terminator(daemon) 

time.sleep(1) 

# daemon should no longer accept connections 

try: 

self.connect(port) 

except EnvironmentError as exception: 

self.assertEqual(exception.errno, ECONNREFUSED) 

else: 

self.fail("Expected EnvironmentError to be raised") 

def test_termination_stdin(self): 

"""Ensure that daemon and workers terminate when stdin is closed.""" 

self.do_termination_test(lambda daemon: daemon.stdin.close()) 

def test_termination_sigterm(self): 

"""Ensure that daemon and workers terminate on SIGTERM.""" 

from signal import SIGTERM 

self.do_termination_test(lambda daemon: os.kill(daemon.pid, SIGTERM)) 

if __name__ == "__main__": 

from pyspark.tests.test_daemon import * # noqa: F401 

try: 

import xmlrunner # type: ignore[import] 

testRunner = xmlrunner.XMLTestRunner(output='target/test-reports', verbosity=2) 

except ImportError: 

testRunner = None 

unittest.main(testRunner=testRunner, verbosity=2)