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[SPARK-5161] Parallelize Python test execution

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This commit parallelizes the Python unit test execution, significantly reducing Jenkins build times.  Parallelism is now configurable by passing the `-p` or `--parallelism` flags to either `dev/run-tests` or `python/run-tests` (the default parallelism is 4, but I've successfully tested with higher parallelism).

To avoid flakiness, I've disabled the Spark Web UI for the Python tests, similar to what we've done for the JVM tests.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #7031 from JoshRosen/parallelize-python-tests and squashes the following commits:

feb3763 [Josh Rosen] Re-enable other tests
f87ea81 [Josh Rosen] Only log output from failed tests
d4ded73 [Josh Rosen] Logging improvements
a2717e1 [Josh Rosen] Make parallelism configurable via dev/run-tests
1bacf1b [Josh Rosen] Merge remote-tracking branch 'origin/master' into parallelize-python-tests
110cd9d [Josh Rosen] Fix universal_newlines for Python 3
cd13db8 [Josh Rosen] Also log python_implementation
9e31127 [Josh Rosen] Log Python --version output for each executable.
a2b9094 [Josh Rosen] Bump up parallelism.
5552380 [Josh Rosen] Python 3 fix
866b5b9 [Josh Rosen] Fix lazy logging warnings in Prospector checks
87cb988 [Josh Rosen] Skip MLLib tests for PyPy
8309bfe [Josh Rosen] Temporarily disable parallelism to debug a failure
9129027 [Josh Rosen] Disable Spark UI in Python tests
037b686 [Josh Rosen] Temporarily disable JVM tests so we can test Python speedup in Jenkins.
af4cef4 [Josh Rosen] Initial attempt at parallelizing Python test execution
This commit is contained in:
Josh Rosen 2015-06-29 21:32:40 -07:00 committed by Davies Liu
parent f9b6bf2f83
commit 7bbbe380c5
5 changed files with 101 additions and 25 deletions
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2
dev/run-tests
View file

@ -20,4 +20,4 @@
FWDIR="$(cd "`dirname $0`"/..; pwd)"
cd "$FWDIR"
exec python -u ./dev/run-tests.py
exec python -u ./dev/run-tests.py "$@"

24
dev/run-tests.py
View file

@ -19,6 +19,7 @@
from __future__ import print_function
import itertools
from optparse import OptionParser
import os
import re
import sys
@ -360,12 +361,13 @@ def run_scala_tests(build_tool, hadoop_version, test_modules):
run_scala_tests_sbt(test_modules, test_profiles)
def run_python_tests(test_modules):
def run_python_tests(test_modules, parallelism):
set_title_and_block("Running PySpark tests", "BLOCK_PYSPARK_UNIT_TESTS")
command = [os.path.join(SPARK_HOME, "python", "run-tests")]
if test_modules != [modules.root]:
command.append("--modules=%s" % ','.join(m.name for m in test_modules))
command.append("--parallelism=%i" % parallelism)
run_cmd(command)
@ -379,7 +381,25 @@ def run_sparkr_tests():
print("Ignoring SparkR tests as R was not found in PATH")
def parse_opts():
parser = OptionParser(
prog="run-tests"
)
parser.add_option(
"-p", "--parallelism", type="int", default=4,
help="The number of suites to test in parallel (default %default)"
)
(opts, args) = parser.parse_args()
if args:
parser.error("Unsupported arguments: %s" % ' '.join(args))
if opts.parallelism < 1:
parser.error("Parallelism cannot be less than 1")
return opts
def main():
opts = parse_opts()
# Ensure the user home directory (HOME) is valid and is an absolute directory
if not USER_HOME or not os.path.isabs(USER_HOME):
print("[error] Cannot determine your home directory as an absolute path;",
@ -461,7 +481,7 @@ def main():
modules_with_python_tests = [m for m in test_modules if m.python_test_goals]
if modules_with_python_tests:
run_python_tests(modules_with_python_tests)
run_python_tests(modules_with_python_tests, opts.parallelism)
if any(m.should_run_r_tests for m in test_modules):
run_sparkr_tests()

1
dev/sparktestsupport/shellutils.py
View file

@ -15,6 +15,7 @@
# limitations under the License.
#
from __future__ import print_function
import os
import shutil
import subprocess

2
python/pyspark/java_gateway.py
View file

@ -51,6 +51,8 @@ def launch_gateway():
on_windows = platform.system() == "Windows"
script = "./bin/spark-submit.cmd" if on_windows else "./bin/spark-submit"
submit_args = os.environ.get("PYSPARK_SUBMIT_ARGS", "pyspark-shell")
if os.environ.get("SPARK_TESTING"):
submit_args = "--conf spark.ui.enabled=false " + submit_args
command = [os.path.join(SPARK_HOME, script)] + shlex.split(submit_args)
# Start a socket that will be used by PythonGatewayServer to communicate its port to us

97
python/run-tests.py
View file

@ -18,12 +18,19 @@
#
from __future__ import print_function
import logging
from optparse import OptionParser
import os
import re
import subprocess
import sys
import tempfile
from threading import Thread, Lock
import time
if sys.version < '3':
import Queue
else:
import queue as Queue
# Append `SPARK_HOME/dev` to the Python path so that we can import the sparktestsupport module
@ -43,34 +50,44 @@ def print_red(text):
LOG_FILE = os.path.join(SPARK_HOME, "python/unit-tests.log")
FAILURE_REPORTING_LOCK = Lock()
LOGGER = logging.getLogger()
def run_individual_python_test(test_name, pyspark_python):
env = {'SPARK_TESTING': '1', 'PYSPARK_PYTHON': which(pyspark_python)}
print(" Running test: %s ..." % test_name, end='')
LOGGER.debug("Starting test(%s): %s", pyspark_python, test_name)
start_time = time.time()
with open(LOG_FILE, 'a') as log_file:
retcode = subprocess.call(
[os.path.join(SPARK_HOME, "bin/pyspark"), test_name],
stderr=log_file, stdout=log_file, env=env)
per_test_output = tempfile.TemporaryFile()
retcode = subprocess.Popen(
[os.path.join(SPARK_HOME, "bin/pyspark"), test_name],
stderr=per_test_output, stdout=per_test_output, env=env).wait()
duration = time.time() - start_time
# Exit on the first failure.
if retcode != 0:
with open(LOG_FILE, 'r') as log_file:
for line in log_file:
with FAILURE_REPORTING_LOCK:
with open(LOG_FILE, 'ab') as log_file:
per_test_output.seek(0)
log_file.writelines(per_test_output.readlines())
per_test_output.seek(0)
for line in per_test_output:
if not re.match('[0-9]+', line):
print(line, end='')
print_red("\nHad test failures in %s; see logs." % test_name)
exit(-1)
per_test_output.close()
print_red("\nHad test failures in %s with %s; see logs." % (test_name, pyspark_python))
# Here, we use os._exit() instead of sys.exit() in order to force Python to exit even if
# this code is invoked from a thread other than the main thread.
os._exit(-1)
else:
print("ok (%is)" % duration)
per_test_output.close()
LOGGER.info("Finished test(%s): %s (%is)", pyspark_python, test_name, duration)
def get_default_python_executables():
python_execs = [x for x in ["python2.6", "python3.4", "pypy"] if which(x)]
if "python2.6" not in python_execs:
print("WARNING: Not testing against `python2.6` because it could not be found; falling"
" back to `python` instead")
LOGGER.warning("Not testing against `python2.6` because it could not be found; falling"
" back to `python` instead")
python_execs.insert(0, "python")
return python_execs
@ -88,16 +105,31 @@ def parse_opts():
default=",".join(sorted(python_modules.keys())),
help="A comma-separated list of Python modules to test (default: %default)"
)
parser.add_option(
"-p", "--parallelism", type="int", default=4,
help="The number of suites to test in parallel (default %default)"
)
parser.add_option(
"--verbose", action="store_true",
help="Enable additional debug logging"
)
(opts, args) = parser.parse_args()
if args:
parser.error("Unsupported arguments: %s" % ' '.join(args))
if opts.parallelism < 1:
parser.error("Parallelism cannot be less than 1")
return opts
def main():
opts = parse_opts()
print("Running PySpark tests. Output is in python/%s" % LOG_FILE)
if (opts.verbose):
log_level = logging.DEBUG
else:
log_level = logging.INFO
logging.basicConfig(stream=sys.stdout, level=log_level, format="%(message)s")
LOGGER.info("Running PySpark tests. Output is in python/%s", LOG_FILE)
if os.path.exists(LOG_FILE):
os.remove(LOG_FILE)
python_execs = opts.python_executables.split(',')
@ -108,24 +140,45 @@ def main():
else:
print("Error: unrecognized module %s" % module_name)
sys.exit(-1)
print("Will test against the following Python executables: %s" % python_execs)
print("Will test the following Python modules: %s" % [x.name for x in modules_to_test])
LOGGER.info("Will test against the following Python executables: %s", python_execs)
LOGGER.info("Will test the following Python modules: %s", [x.name for x in modules_to_test])
start_time = time.time()
task_queue = Queue.Queue()
for python_exec in python_execs:
python_implementation = subprocess.check_output(
[python_exec, "-c", "import platform; print(platform.python_implementation())"],
universal_newlines=True).strip()
print("Testing with `%s`: " % python_exec, end='')
subprocess.call([python_exec, "--version"])
LOGGER.debug("%s python_implementation is %s", python_exec, python_implementation)
LOGGER.debug("%s version is: %s", python_exec, subprocess.check_output(
[python_exec, "--version"], stderr=subprocess.STDOUT, universal_newlines=True).strip())
for module in modules_to_test:
if python_implementation not in module.blacklisted_python_implementations:
print("Running %s tests ..." % module.name)
for test_goal in module.python_test_goals:
run_individual_python_test(test_goal, python_exec)
task_queue.put((python_exec, test_goal))
def process_queue(task_queue):
while True:
try:
(python_exec, test_goal) = task_queue.get_nowait()
except Queue.Empty:
break
try:
run_individual_python_test(test_goal, python_exec)
finally:
task_queue.task_done()
start_time = time.time()
for _ in range(opts.parallelism):
worker = Thread(target=process_queue, args=(task_queue,))
worker.daemon = True
worker.start()
try:
task_queue.join()
except (KeyboardInterrupt, SystemExit):
print_red("Exiting due to interrupt")
sys.exit(-1)
total_duration = time.time() - start_time
print("Tests passed in %i seconds" % total_duration)
LOGGER.info("Tests passed in %i seconds", total_duration)
if __name__ == "__main__":