-# usage example:
-#
-# ARVADOS_API_TOKEN=abc ARVADOS_API_HOST=arvados.local python -m unittest discover
-
+import hashlib
+import mock
import os
+import pycurl
+import random
+import re
+import socket
+import threading
+import time
import unittest
+import urlparse
import arvados
+import arvados.retry
+import arvados_testutil as tutil
+import keepstub
import run_test_server
class KeepTestCase(run_test_server.TestCaseWithServers):
blob_str,
'wrong content from Keep.get(md5(<binarydata>))')
+ def test_KeepEmptyCollectionTest(self):
+ blob_locator = self.keep_client.put('', copies=1)
+ self.assertRegexpMatches(
+ blob_locator,
+ '^d41d8cd98f00b204e9800998ecf8427e\+0',
+ ('wrong locator from Keep.put(""): ' + blob_locator))
+
+ def test_unicode_must_be_ascii(self):
+ # If unicode type, must only consist of valid ASCII
+ foo_locator = self.keep_client.put(u'foo')
+ self.assertRegexpMatches(
+ foo_locator,
+ '^acbd18db4cc2f85cedef654fccc4a4d8\+3',
+ 'wrong md5 hash from Keep.put("foo"): ' + foo_locator)
+
+ with self.assertRaises(UnicodeEncodeError):
+ # Error if it is not ASCII
+ self.keep_client.put(u'\xe2')
+
+ with self.assertRaises(arvados.errors.ArgumentError):
+ # Must be a string type
+ self.keep_client.put({})
class KeepPermissionTestCase(run_test_server.TestCaseWithServers):
MAIN_SERVER = {}
class KeepProxyTestCase(run_test_server.TestCaseWithServers):
MAIN_SERVER = {}
KEEP_SERVER = {}
- KEEP_PROXY_SERVER = {'auth': 'admin'}
+ KEEP_PROXY_SERVER = {}
@classmethod
def setUpClass(cls):
super(KeepProxyTestCase, cls).setUpClass()
+ run_test_server.authorize_with('active')
cls.api_client = arvados.api('v1')
def tearDown(self):
'baz2',
'wrong content from Keep.get(md5("baz2"))')
self.assertTrue(keep_client.using_proxy)
+
+
+class KeepClientServiceTestCase(unittest.TestCase, tutil.ApiClientMock):
+ def get_service_roots(self, api_client):
+ keep_client = arvados.KeepClient(api_client=api_client)
+ services = keep_client.weighted_service_roots(arvados.KeepLocator('0'*32))
+ return [urlparse.urlparse(url) for url in sorted(services)]
+
+ def test_ssl_flag_respected_in_roots(self):
+ for ssl_flag in [False, True]:
+ services = self.get_service_roots(self.mock_keep_services(
+ service_ssl_flag=ssl_flag))
+ self.assertEqual(
+ ('https' if ssl_flag else 'http'), services[0].scheme)
+
+ def test_correct_ports_with_ipv6_addresses(self):
+ service = self.get_service_roots(self.mock_keep_services(
+ service_type='proxy', service_host='100::1', service_port=10, count=1))[0]
+ self.assertEqual('100::1', service.hostname)
+ self.assertEqual(10, service.port)
+
+ # test_*_timeout verify that KeepClient instructs pycurl to use
+ # the appropriate connection and read timeouts. They don't care
+ # whether pycurl actually exhibits the expected timeout behavior
+ # -- those tests are in the KeepClientTimeout test class.
+
+ def test_get_timeout(self):
+ api_client = self.mock_keep_services(count=1)
+ force_timeout = socket.timeout("timed out")
+ with tutil.mock_keep_responses(force_timeout, 0) as mock:
+ keep_client = arvados.KeepClient(api_client=api_client)
+ with self.assertRaises(arvados.errors.KeepReadError):
+ keep_client.get('ffffffffffffffffffffffffffffffff')
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.CONNECTTIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[0]*1000))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.TIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[1]*1000))
+
+ def test_put_timeout(self):
+ api_client = self.mock_keep_services(count=1)
+ force_timeout = socket.timeout("timed out")
+ with tutil.mock_keep_responses(force_timeout, 0) as mock:
+ keep_client = arvados.KeepClient(api_client=api_client)
+ with self.assertRaises(arvados.errors.KeepWriteError):
+ keep_client.put('foo')
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.CONNECTTIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[0]*1000))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.TIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[1]*1000))
+
+ def test_proxy_get_timeout(self):
+ api_client = self.mock_keep_services(service_type='proxy', count=1)
+ force_timeout = socket.timeout("timed out")
+ with tutil.mock_keep_responses(force_timeout, 0) as mock:
+ keep_client = arvados.KeepClient(api_client=api_client)
+ with self.assertRaises(arvados.errors.KeepReadError):
+ keep_client.get('ffffffffffffffffffffffffffffffff')
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.CONNECTTIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[0]*1000))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.TIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[1]*1000))
+
+ def test_proxy_put_timeout(self):
+ api_client = self.mock_keep_services(service_type='proxy', count=1)
+ force_timeout = socket.timeout("timed out")
+ with tutil.mock_keep_responses(force_timeout, 0) as mock:
+ keep_client = arvados.KeepClient(api_client=api_client)
+ with self.assertRaises(arvados.errors.KeepWriteError):
+ keep_client.put('foo')
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.CONNECTTIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[0]*1000))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.TIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[1]*1000))
+
+ def check_no_services_error(self, verb, exc_class):
+ api_client = mock.MagicMock(name='api_client')
+ api_client.keep_services().accessible().execute.side_effect = (
+ arvados.errors.ApiError)
+ keep_client = arvados.KeepClient(api_client=api_client)
+ with self.assertRaises(exc_class) as err_check:
+ getattr(keep_client, verb)('d41d8cd98f00b204e9800998ecf8427e+0')
+ self.assertEqual(0, len(err_check.exception.request_errors()))
+
+ def test_get_error_with_no_services(self):
+ self.check_no_services_error('get', arvados.errors.KeepReadError)
+
+ def test_put_error_with_no_services(self):
+ self.check_no_services_error('put', arvados.errors.KeepWriteError)
+
+ def check_errors_from_last_retry(self, verb, exc_class):
+ api_client = self.mock_keep_services(count=2)
+ req_mock = tutil.mock_keep_responses(
+ "retry error reporting test", 500, 500, 403, 403)
+ with req_mock, tutil.skip_sleep, \
+ self.assertRaises(exc_class) as err_check:
+ keep_client = arvados.KeepClient(api_client=api_client)
+ getattr(keep_client, verb)('d41d8cd98f00b204e9800998ecf8427e+0',
+ num_retries=3)
+ self.assertEqual([403, 403], [
+ getattr(error, 'status_code', None)
+ for error in err_check.exception.request_errors().itervalues()])
+
+ def test_get_error_reflects_last_retry(self):
+ self.check_errors_from_last_retry('get', arvados.errors.KeepReadError)
+
+ def test_put_error_reflects_last_retry(self):
+ self.check_errors_from_last_retry('put', arvados.errors.KeepWriteError)
+
+ def test_put_error_does_not_include_successful_puts(self):
+ data = 'partial failure test'
+ data_loc = tutil.str_keep_locator(data)
+ api_client = self.mock_keep_services(count=3)
+ with tutil.mock_keep_responses(data_loc, 200, 500, 500) as req_mock, \
+ self.assertRaises(arvados.errors.KeepWriteError) as exc_check:
+ keep_client = arvados.KeepClient(api_client=api_client)
+ keep_client.put(data)
+ self.assertEqual(2, len(exc_check.exception.request_errors()))
+
+ def test_proxy_put_with_no_writable_services(self):
+ data = 'test with no writable services'
+ data_loc = tutil.str_keep_locator(data)
+ api_client = self.mock_keep_services(service_type='proxy', read_only=True, count=1)
+ with tutil.mock_keep_responses(data_loc, 200, 500, 500) as req_mock, \
+ self.assertRaises(arvados.errors.KeepWriteError) as exc_check:
+ keep_client = arvados.KeepClient(api_client=api_client)
+ keep_client.put(data)
+ self.assertEqual(True, ("no Keep services available" in str(exc_check.exception)))
+ self.assertEqual(0, len(exc_check.exception.request_errors()))
+
+ def test_oddball_service_get(self):
+ body = 'oddball service get'
+ api_client = self.mock_keep_services(service_type='fancynewblobstore')
+ with tutil.mock_keep_responses(body, 200):
+ keep_client = arvados.KeepClient(api_client=api_client)
+ actual = keep_client.get(tutil.str_keep_locator(body))
+ self.assertEqual(body, actual)
+
+ def test_oddball_service_put(self):
+ body = 'oddball service put'
+ pdh = tutil.str_keep_locator(body)
+ api_client = self.mock_keep_services(service_type='fancynewblobstore')
+ with tutil.mock_keep_responses(pdh, 200):
+ keep_client = arvados.KeepClient(api_client=api_client)
+ actual = keep_client.put(body, copies=1)
+ self.assertEqual(pdh, actual)
+
+ def test_oddball_service_writer_count(self):
+ body = 'oddball service writer count'
+ pdh = tutil.str_keep_locator(body)
+ api_client = self.mock_keep_services(service_type='fancynewblobstore',
+ count=4)
+ headers = {'x-keep-replicas-stored': 3}
+ with tutil.mock_keep_responses(pdh, 200, 418, 418, 418,
+ **headers) as req_mock:
+ keep_client = arvados.KeepClient(api_client=api_client)
+ actual = keep_client.put(body, copies=2)
+ self.assertEqual(pdh, actual)
+ self.assertEqual(1, req_mock.call_count)
+
+
+@tutil.skip_sleep
+class KeepClientRendezvousTestCase(unittest.TestCase, tutil.ApiClientMock):
+
+ def setUp(self):
+ # expected_order[i] is the probe order for
+ # hash=md5(sprintf("%064x",i)) where there are 16 services
+ # with uuid sprintf("anything-%015x",j) with j in 0..15. E.g.,
+ # the first probe for the block consisting of 64 "0"
+ # characters is the service whose uuid is
+ # "zzzzz-bi6l4-000000000000003", so expected_order[0][0]=='3'.
+ self.services = 16
+ self.expected_order = [
+ list('3eab2d5fc9681074'),
+ list('097dba52e648f1c3'),
+ list('c5b4e023f8a7d691'),
+ list('9d81c02e76a3bf54'),
+ ]
+ self.blocks = [
+ "{:064x}".format(x)
+ for x in range(len(self.expected_order))]
+ self.hashes = [
+ hashlib.md5(self.blocks[x]).hexdigest()
+ for x in range(len(self.expected_order))]
+ self.api_client = self.mock_keep_services(count=self.services)
+ self.keep_client = arvados.KeepClient(api_client=self.api_client)
+
+ def test_weighted_service_roots_against_reference_set(self):
+ # Confirm weighted_service_roots() returns the correct order
+ for i, hash in enumerate(self.hashes):
+ roots = self.keep_client.weighted_service_roots(arvados.KeepLocator(hash))
+ got_order = [
+ re.search(r'//\[?keep0x([0-9a-f]+)', root).group(1)
+ for root in roots]
+ self.assertEqual(self.expected_order[i], got_order)
+
+ def test_get_probe_order_against_reference_set(self):
+ self._test_probe_order_against_reference_set(
+ lambda i: self.keep_client.get(self.hashes[i], num_retries=1))
+
+ def test_put_probe_order_against_reference_set(self):
+ # copies=1 prevents the test from being sensitive to races
+ # between writer threads.
+ self._test_probe_order_against_reference_set(
+ lambda i: self.keep_client.put(self.blocks[i], num_retries=1, copies=1))
+
+ def _test_probe_order_against_reference_set(self, op):
+ for i in range(len(self.blocks)):
+ with tutil.mock_keep_responses('', *[500 for _ in range(self.services*2)]) as mock, \
+ self.assertRaises(arvados.errors.KeepRequestError):
+ op(i)
+ got_order = [
+ re.search(r'//\[?keep0x([0-9a-f]+)', resp.getopt(pycurl.URL)).group(1)
+ for resp in mock.responses]
+ self.assertEqual(self.expected_order[i]*2, got_order)
+
+ def test_put_probe_order_multiple_copies(self):
+ for copies in range(2, 4):
+ for i in range(len(self.blocks)):
+ with tutil.mock_keep_responses('', *[500 for _ in range(self.services*3)]) as mock, \
+ self.assertRaises(arvados.errors.KeepWriteError):
+ self.keep_client.put(self.blocks[i], num_retries=2, copies=copies)
+ got_order = [
+ re.search(r'//\[?keep0x([0-9a-f]+)', resp.getopt(pycurl.URL)).group(1)
+ for resp in mock.responses]
+ # With T threads racing to make requests, the position
+ # of a given server in the sequence of HTTP requests
+ # (got_order) cannot be more than T-1 positions
+ # earlier than that server's position in the reference
+ # probe sequence (expected_order).
+ #
+ # Loop invariant: we have accounted for +pos+ expected
+ # probes, either by seeing them in +got_order+ or by
+ # putting them in +pending+ in the hope of seeing them
+ # later. As long as +len(pending)<T+, we haven't
+ # started a request too early.
+ pending = []
+ for pos, expected in enumerate(self.expected_order[i]*3):
+ got = got_order[pos-len(pending)]
+ while got in pending:
+ del pending[pending.index(got)]
+ got = got_order[pos-len(pending)]
+ if got != expected:
+ pending.append(expected)
+ self.assertLess(
+ len(pending), copies,
+ "pending={}, with copies={}, got {}, expected {}".format(
+ pending, copies, repr(got_order), repr(self.expected_order[i]*3)))
+
+ def test_probe_waste_adding_one_server(self):
+ hashes = [
+ hashlib.md5("{:064x}".format(x)).hexdigest() for x in range(100)]
+ initial_services = 12
+ self.api_client = self.mock_keep_services(count=initial_services)
+ self.keep_client = arvados.KeepClient(api_client=self.api_client)
+ probes_before = [
+ self.keep_client.weighted_service_roots(arvados.KeepLocator(hash)) for hash in hashes]
+ for added_services in range(1, 12):
+ api_client = self.mock_keep_services(count=initial_services+added_services)
+ keep_client = arvados.KeepClient(api_client=api_client)
+ total_penalty = 0
+ for hash_index in range(len(hashes)):
+ probe_after = keep_client.weighted_service_roots(
+ arvados.KeepLocator(hashes[hash_index]))
+ penalty = probe_after.index(probes_before[hash_index][0])
+ self.assertLessEqual(penalty, added_services)
+ total_penalty += penalty
+ # Average penalty per block should not exceed
+ # N(added)/N(orig) by more than 20%, and should get closer
+ # to the ideal as we add data points.
+ expect_penalty = (
+ added_services *
+ len(hashes) / initial_services)
+ max_penalty = (
+ expect_penalty *
+ (120 - added_services)/100)
+ min_penalty = (
+ expect_penalty * 8/10)
+ self.assertTrue(
+ min_penalty <= total_penalty <= max_penalty,
+ "With {}+{} services, {} blocks, penalty {} but expected {}..{}".format(
+ initial_services,
+ added_services,
+ len(hashes),
+ total_penalty,
+ min_penalty,
+ max_penalty))
+
+ def check_64_zeros_error_order(self, verb, exc_class):
+ data = '0' * 64
+ if verb == 'get':
+ data = tutil.str_keep_locator(data)
+ # Arbitrary port number:
+ aport = random.randint(1024,65535)
+ api_client = self.mock_keep_services(service_port=aport, count=self.services)
+ keep_client = arvados.KeepClient(api_client=api_client)
+ with mock.patch('pycurl.Curl') as curl_mock, \
+ self.assertRaises(exc_class) as err_check:
+ curl_mock.return_value.side_effect = socket.timeout
+ getattr(keep_client, verb)(data)
+ urls = [urlparse.urlparse(url)
+ for url in err_check.exception.request_errors()]
+ self.assertEqual([('keep0x' + c, aport) for c in '3eab2d5fc9681074'],
+ [(url.hostname, url.port) for url in urls])
+
+ def test_get_error_shows_probe_order(self):
+ self.check_64_zeros_error_order('get', arvados.errors.KeepReadError)
+
+ def test_put_error_shows_probe_order(self):
+ self.check_64_zeros_error_order('put', arvados.errors.KeepWriteError)
+
+
+class KeepClientTimeout(unittest.TestCase, tutil.ApiClientMock):
+ DATA = 'x' * 2**10
+
+ class assertTakesBetween(unittest.TestCase):
+ def __init__(self, tmin, tmax):
+ self.tmin = tmin
+ self.tmax = tmax
+
+ def __enter__(self):
+ self.t0 = time.time()
+
+ def __exit__(self, *args, **kwargs):
+ self.assertGreater(time.time() - self.t0, self.tmin)
+ self.assertLess(time.time() - self.t0, self.tmax)
+
+ def setUp(self):
+ sock = socket.socket()
+ sock.bind(('0.0.0.0', 0))
+ self.port = sock.getsockname()[1]
+ sock.close()
+ self.server = keepstub.Server(('0.0.0.0', self.port), keepstub.Handler)
+ self.thread = threading.Thread(target=self.server.serve_forever)
+ self.thread.daemon = True # Exit thread if main proc exits
+ self.thread.start()
+ self.api_client = self.mock_keep_services(
+ count=1,
+ service_host='localhost',
+ service_port=self.port,
+ )
+
+ def tearDown(self):
+ self.server.shutdown()
+
+ def keepClient(self, timeouts=(0.1, 1.0)):
+ return arvados.KeepClient(
+ api_client=self.api_client,
+ timeout=timeouts)
+
+ def test_timeout_slow_connect(self):
+ # Can't simulate TCP delays with our own socket. Leave our
+ # stub server running uselessly, and try to connect to an
+ # unroutable IP address instead.
+ self.api_client = self.mock_keep_services(
+ count=1,
+ service_host='240.0.0.0',
+ )
+ with self.assertTakesBetween(0.1, 0.5):
+ with self.assertRaises(arvados.errors.KeepWriteError):
+ self.keepClient((0.1, 1)).put(self.DATA, copies=1, num_retries=0)
+
+ def test_timeout_slow_request(self):
+ self.server.setdelays(request=0.2)
+ self._test_200ms()
+
+ def test_timeout_slow_response(self):
+ self.server.setdelays(response=0.2)
+ self._test_200ms()
+
+ def test_timeout_slow_response_body(self):
+ self.server.setdelays(response_body=0.2)
+ self._test_200ms()
+
+ def _test_200ms(self):
+ """Connect should be t<100ms, request should be 200ms <= t < 300ms"""
+
+ # Allow 100ms to connect, then 1s for response. Everything
+ # should work, and everything should take at least 200ms to
+ # return.
+ kc = self.keepClient((.1, 1))
+ with self.assertTakesBetween(.2, .3):
+ loc = kc.put(self.DATA, copies=1, num_retries=0)
+ with self.assertTakesBetween(.2, .3):
+ self.assertEqual(self.DATA, kc.get(loc, num_retries=0))
+
+ # Allow 1s to connect, then 100ms for response. Nothing should
+ # work, and everything should take at least 100ms to return.
+ kc = self.keepClient((1, .1))
+ with self.assertTakesBetween(.1, .2):
+ with self.assertRaises(arvados.errors.KeepReadError):
+ kc.get(loc, num_retries=0)
+ with self.assertTakesBetween(.1, .2):
+ with self.assertRaises(arvados.errors.KeepWriteError):
+ kc.put(self.DATA, copies=1, num_retries=0)
+
+
+class KeepClientGatewayTestCase(unittest.TestCase, tutil.ApiClientMock):
+ def mock_disks_and_gateways(self, disks=3, gateways=1):
+ self.gateways = [{
+ 'uuid': 'zzzzz-bi6l4-gateway{:08d}'.format(i),
+ 'owner_uuid': 'zzzzz-tpzed-000000000000000',
+ 'service_host': 'gatewayhost{}'.format(i),
+ 'service_port': 12345,
+ 'service_ssl_flag': True,
+ 'service_type': 'gateway:test',
+ } for i in range(gateways)]
+ self.gateway_roots = [
+ "https://{service_host}:{service_port}/".format(**gw)
+ for gw in self.gateways]
+ self.api_client = self.mock_keep_services(
+ count=disks, additional_services=self.gateways)
+ self.keepClient = arvados.KeepClient(api_client=self.api_client)
+
+ @mock.patch('pycurl.Curl')
+ def test_get_with_gateway_hint_first(self, MockCurl):
+ MockCurl.return_value = tutil.FakeCurl.make(
+ code=200, body='foo', headers={'Content-Length': 3})
+ self.mock_disks_and_gateways()
+ locator = 'acbd18db4cc2f85cedef654fccc4a4d8+3+K@' + self.gateways[0]['uuid']
+ self.assertEqual('foo', self.keepClient.get(locator))
+ self.assertEqual(self.gateway_roots[0]+locator,
+ MockCurl.return_value.getopt(pycurl.URL))
+
+ @mock.patch('pycurl.Curl')
+ def test_get_with_gateway_hints_in_order(self, MockCurl):
+ gateways = 4
+ disks = 3
+ mocks = [
+ tutil.FakeCurl.make(code=404, body='')
+ for _ in range(gateways+disks)
+ ]
+ MockCurl.side_effect = tutil.queue_with(mocks)
+ self.mock_disks_and_gateways(gateways=gateways, disks=disks)
+ locator = '+'.join(['acbd18db4cc2f85cedef654fccc4a4d8+3'] +
+ ['K@'+gw['uuid'] for gw in self.gateways])
+ with self.assertRaises(arvados.errors.NotFoundError):
+ self.keepClient.get(locator)
+ # Gateways are tried first, in the order given.
+ for i, root in enumerate(self.gateway_roots):
+ self.assertEqual(root+locator,
+ mocks[i].getopt(pycurl.URL))
+ # Disk services are tried next.
+ for i in range(gateways, gateways+disks):
+ self.assertRegexpMatches(
+ mocks[i].getopt(pycurl.URL),
+ r'keep0x')
+
+ @mock.patch('pycurl.Curl')
+ def test_get_with_remote_proxy_hint(self, MockCurl):
+ MockCurl.return_value = tutil.FakeCurl.make(
+ code=200, body='foo', headers={'Content-Length': 3})
+ self.mock_disks_and_gateways()
+ locator = 'acbd18db4cc2f85cedef654fccc4a4d8+3+K@xyzzy'
+ self.assertEqual('foo', self.keepClient.get(locator))
+ self.assertEqual('https://keep.xyzzy.arvadosapi.com/'+locator,
+ MockCurl.return_value.getopt(pycurl.URL))
+
+
+class KeepClientRetryTestMixin(object):
+ # Testing with a local Keep store won't exercise the retry behavior.
+ # Instead, our strategy is:
+ # * Create a client with one proxy specified (pointed at a black
+ # hole), so there's no need to instantiate an API client, and
+ # all HTTP requests come from one place.
+ # * Mock httplib's request method to provide simulated responses.
+ # This lets us test the retry logic extensively without relying on any
+ # supporting servers, and prevents side effects in case something hiccups.
+ # To use this mixin, define DEFAULT_EXPECT, DEFAULT_EXCEPTION, and
+ # run_method().
+ #
+ # Test classes must define TEST_PATCHER to a method that mocks
+ # out appropriate methods in the client.
+
+ PROXY_ADDR = 'http://[%s]:65535/' % (tutil.TEST_HOST,)
+ TEST_DATA = 'testdata'
+ TEST_LOCATOR = 'ef654c40ab4f1747fc699915d4f70902+8'
+
+ def setUp(self):
+ self.client_kwargs = {'proxy': self.PROXY_ADDR, 'local_store': ''}
+
+ def new_client(self, **caller_kwargs):
+ kwargs = self.client_kwargs.copy()
+ kwargs.update(caller_kwargs)
+ return arvados.KeepClient(**kwargs)
+
+ def run_method(self, *args, **kwargs):
+ raise NotImplementedError("test subclasses must define run_method")
+
+ def check_success(self, expected=None, *args, **kwargs):
+ if expected is None:
+ expected = self.DEFAULT_EXPECT
+ self.assertEqual(expected, self.run_method(*args, **kwargs))
+
+ def check_exception(self, error_class=None, *args, **kwargs):
+ if error_class is None:
+ error_class = self.DEFAULT_EXCEPTION
+ self.assertRaises(error_class, self.run_method, *args, **kwargs)
+
+ def test_immediate_success(self):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 200):
+ self.check_success()
+
+ def test_retry_then_success(self):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 200):
+ self.check_success(num_retries=3)
+
+ def test_no_default_retry(self):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 200):
+ self.check_exception()
+
+ def test_no_retry_after_permanent_error(self):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 403, 200):
+ self.check_exception(num_retries=3)
+
+ def test_error_after_retries_exhausted(self):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 500, 200):
+ self.check_exception(num_retries=1)
+
+ def test_num_retries_instance_fallback(self):
+ self.client_kwargs['num_retries'] = 3
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 200):
+ self.check_success()
+
+
+@tutil.skip_sleep
+class KeepClientRetryGetTestCase(KeepClientRetryTestMixin, unittest.TestCase):
+ DEFAULT_EXPECT = KeepClientRetryTestMixin.TEST_DATA
+ DEFAULT_EXCEPTION = arvados.errors.KeepReadError
+ HINTED_LOCATOR = KeepClientRetryTestMixin.TEST_LOCATOR + '+K@xyzzy'
+ TEST_PATCHER = staticmethod(tutil.mock_keep_responses)
+
+ def run_method(self, locator=KeepClientRetryTestMixin.TEST_LOCATOR,
+ *args, **kwargs):
+ return self.new_client().get(locator, *args, **kwargs)
+
+ def test_specific_exception_when_not_found(self):
+ with tutil.mock_keep_responses(self.DEFAULT_EXPECT, 404, 200):
+ self.check_exception(arvados.errors.NotFoundError, num_retries=3)
+
+ def test_general_exception_with_mixed_errors(self):
+ # get should raise a NotFoundError if no server returns the block,
+ # and a high threshold of servers report that it's not found.
+ # This test rigs up 50/50 disagreement between two servers, and
+ # checks that it does not become a NotFoundError.
+ client = self.new_client()
+ with tutil.mock_keep_responses(self.DEFAULT_EXPECT, 404, 500):
+ with self.assertRaises(arvados.errors.KeepReadError) as exc_check:
+ client.get(self.HINTED_LOCATOR)
+ self.assertNotIsInstance(
+ exc_check.exception, arvados.errors.NotFoundError,
+ "mixed errors raised NotFoundError")
+
+ def test_hint_server_can_succeed_without_retries(self):
+ with tutil.mock_keep_responses(self.DEFAULT_EXPECT, 404, 200, 500):
+ self.check_success(locator=self.HINTED_LOCATOR)
+
+ def test_try_next_server_after_timeout(self):
+ with tutil.mock_keep_responses(
+ (socket.timeout("timed out"), 200),
+ (self.DEFAULT_EXPECT, 200)):
+ self.check_success(locator=self.HINTED_LOCATOR)
+
+ def test_retry_data_with_wrong_checksum(self):
+ with tutil.mock_keep_responses(
+ ('baddata', 200),
+ (self.DEFAULT_EXPECT, 200)):
+ self.check_success(locator=self.HINTED_LOCATOR)
+
+
+@tutil.skip_sleep
+class KeepClientRetryPutTestCase(KeepClientRetryTestMixin, unittest.TestCase):
+ DEFAULT_EXPECT = KeepClientRetryTestMixin.TEST_LOCATOR
+ DEFAULT_EXCEPTION = arvados.errors.KeepWriteError
+ TEST_PATCHER = staticmethod(tutil.mock_keep_responses)
+
+ def run_method(self, data=KeepClientRetryTestMixin.TEST_DATA,
+ copies=1, *args, **kwargs):
+ return self.new_client().put(data, copies, *args, **kwargs)
+
+ def test_do_not_send_multiple_copies_to_same_server(self):
+ with tutil.mock_keep_responses(self.DEFAULT_EXPECT, 200):
+ self.check_exception(copies=2, num_retries=3)