+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):
proxy='', local_store='')
def test_KeepBasicRWTest(self):
+ self.assertEqual(0, self.keep_client.upload_counter.get())
foo_locator = self.keep_client.put('foo')
self.assertRegexpMatches(
foo_locator,
'^acbd18db4cc2f85cedef654fccc4a4d8\+3',
'wrong md5 hash from Keep.put("foo"): ' + foo_locator)
+
+ # 6 bytes because uploaded 2 copies
+ self.assertEqual(6, self.keep_client.upload_counter.get())
+
+ self.assertEqual(0, self.keep_client.download_counter.get())
self.assertEqual(self.keep_client.get(foo_locator),
'foo',
'wrong content from Keep.get(md5("foo"))')
+ self.assertEqual(3, self.keep_client.download_counter.get())
def test_KeepBinaryRWTest(self):
blob_str = '\xff\xfe\xf7\x00\x01\x02'
blob_str,
'wrong content from Keep.get(md5(<binarydata>))')
+ @unittest.skip("unreliable test - please fix and close #8752")
def test_KeepSingleCopyRWTest(self):
blob_str = '\xff\xfe\xfd\xfc\x00\x01\x02\x03'
blob_locator = self.keep_client.put(blob_str, copies=1)
'^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({})
+
+ def test_KeepHeadTest(self):
+ locator = self.keep_client.put('test_head')
+ self.assertRegexpMatches(
+ locator,
+ '^b9a772c7049325feb7130fff1f8333e9\+9',
+ 'wrong md5 hash from Keep.put for "test_head": ' + locator)
+ self.assertEqual(True, self.keep_client.head(locator))
+ self.assertEqual(self.keep_client.get(locator),
+ 'test_head',
+ 'wrong content from Keep.get for "test_head"')
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):
super(KeepProxyTestCase, self).tearDown()
def test_KeepProxyTest1(self):
- # Will use ARVADOS_KEEP_PROXY environment variable that is set by
- # setUpClass().
+ # Will use ARVADOS_KEEP_SERVICES environment variable that
+ # is set by setUpClass().
keep_client = arvados.KeepClient(api_client=self.api_client,
local_store='')
baz_locator = keep_client.put('baz')
'wrong content from Keep.get(md5("baz2"))')
self.assertTrue(keep_client.using_proxy)
+ def test_KeepProxyTestMultipleURIs(self):
+ # Test using ARVADOS_KEEP_SERVICES env var overriding any
+ # existing proxy setting and setting multiple proxies
+ arvados.config.settings()['ARVADOS_KEEP_SERVICES'] = 'http://10.0.0.1 https://foo.example.org:1234/'
+ keep_client = arvados.KeepClient(api_client=self.api_client,
+ local_store='')
+ uris = [x['_service_root'] for x in keep_client._keep_services]
+ self.assertEqual(uris, ['http://10.0.0.1/',
+ 'https://foo.example.org:1234/'])
-class KeepClientServiceTestCase(unittest.TestCase):
- def mock_keep_services(self, *services):
- api_client = mock.MagicMock(name='api_client')
- api_client.keep_services().accessible().execute.return_value = {
- 'items_available': len(services),
- 'items': [{
- 'uuid': 'zzzzz-bi6l4-mockservice{:04x}'.format(index),
- 'owner_uuid': 'zzzzz-tpzed-mockownerabcdef',
- 'service_host': host,
- 'service_port': port,
- 'service_ssl_flag': ssl,
- 'service_type': servtype,
- } for index, (host, port, ssl, servtype)
- in enumerate(services)],
- }
- return api_client
-
- def get_service_roots(self, *services):
- api_client = self.mock_keep_services(*services)
+ def test_KeepProxyTestInvalidURI(self):
+ arvados.config.settings()['ARVADOS_KEEP_SERVICES'] = 'bad.uri.org'
+ with self.assertRaises(arvados.errors.ArgumentError):
+ keep_client = arvados.KeepClient(api_client=self.api_client,
+ local_store='')
+
+
+class KeepClientServiceTestCase(unittest.TestCase, tutil.ApiClientMock):
+ def get_service_roots(self, api_client):
keep_client = arvados.KeepClient(api_client=api_client)
- services = keep_client.shuffled_service_roots('000000')
+ 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):
- services = self.get_service_roots(('keep', 10, False, 'disk'),
- ('keep', 20, True, 'disk'))
- self.assertEqual(10, services[0].port)
- self.assertEqual('http', services[0].scheme)
- self.assertEqual(20, services[1].port)
- self.assertEqual('https', services[1].scheme)
+ 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(('100::1', 10, True, 'proxy'))[0]
+ 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_get_timeout and test_put_timeout test that
- # KeepClient.get and KeepClient.put use the appropriate timeouts
- # when connected directly to a Keep server (i.e. non-proxy timeout)
+ # 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(('keep', 10, False, 'disk'))
- keep_client = arvados.KeepClient(api_client=api_client)
- force_timeout = [socket.timeout("timed out")]
- with mock.patch('requests.get', side_effect=force_timeout) as mock_request:
+ 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.assertTrue(mock_request.called)
self.assertEqual(
- arvados.KeepClient.DEFAULT_TIMEOUT,
- mock_request.call_args[1]['timeout'])
+ mock.responses[0].getopt(pycurl.CONNECTTIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[0]*1000))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.LOW_SPEED_TIME),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[1]))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.LOW_SPEED_LIMIT),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[2]))
def test_put_timeout(self):
- api_client = self.mock_keep_services(('keep', 10, False, 'disk'))
- keep_client = arvados.KeepClient(api_client=api_client)
- force_timeout = [socket.timeout("timed out")]
- with mock.patch('requests.put', side_effect=force_timeout) as mock_request:
+ 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.LOW_SPEED_TIME),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[1]))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.LOW_SPEED_LIMIT),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[2]))
+
+ def test_head_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.head('ffffffffffffffffffffffffffffffff')
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.CONNECTTIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[0]*1000))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.LOW_SPEED_TIME),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[1]))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.LOW_SPEED_LIMIT),
+ int(arvados.KeepClient.DEFAULT_TIMEOUT[2]))
+
+ 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.LOW_SPEED_TIME),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[1]))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.LOW_SPEED_LIMIT),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[2]))
+
+ def test_proxy_head_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.head('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.LOW_SPEED_TIME),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[1]))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.LOW_SPEED_LIMIT),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[2]))
+
+ 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.assertTrue(mock_request.called)
self.assertEqual(
- arvados.KeepClient.DEFAULT_TIMEOUT,
- mock_request.call_args[1]['timeout'])
+ mock.responses[0].getopt(pycurl.CONNECTTIMEOUT_MS),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[0]*1000))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.LOW_SPEED_TIME),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[1]))
+ self.assertEqual(
+ mock.responses[0].getopt(pycurl.LOW_SPEED_LIMIT),
+ int(arvados.KeepClient.DEFAULT_PROXY_TIMEOUT[2]))
+
+ 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_head_error_with_no_services(self):
+ self.check_no_services_error('head', 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_head_error_reflects_last_retry(self):
+ self.check_errors_from_last_retry('head', 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_head_probe_order_against_reference_set(self):
+ self._test_probe_order_against_reference_set(
+ lambda i: self.keep_client.head(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):
+ # BANDWIDTH_LOW_LIM must be less than len(DATA) so we can transfer
+ # 1s worth of data and then trigger bandwidth errors before running
+ # out of data.
+ DATA = 'x'*2**11
+ BANDWIDTH_LOW_LIM = 1024
+ TIMEOUT_TIME = 1.0
+
+ 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):
+ # Round times to milliseconds, like CURL. Otherwise, we
+ # fail when CURL reaches a 1s timeout at 0.9998s.
+ delta = round(time.time() - self.t0, 3)
+ self.assertGreaterEqual(delta, self.tmin)
+ self.assertLessEqual(delta, self.tmax)
+
+ class assertTakesGreater(unittest.TestCase):
+ def __init__(self, tmin):
+ self.tmin = tmin
+
+ def __enter__(self):
+ self.t0 = time.time()
+
+ def __exit__(self, *args, **kwargs):
+ delta = round(time.time() - self.t0, 3)
+ self.assertGreaterEqual(delta, self.tmin)
+
+ 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, TIMEOUT_TIME, BANDWIDTH_LOW_LIM)):
+ 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().put(self.DATA, copies=1, num_retries=0)
+
+ def test_low_bandwidth_no_delays_success(self):
+ self.server.setbandwidth(2*self.BANDWIDTH_LOW_LIM)
+ kc = self.keepClient()
+ loc = kc.put(self.DATA, copies=1, num_retries=0)
+ self.assertEqual(self.DATA, kc.get(loc, num_retries=0))
+
+ def test_too_low_bandwidth_no_delays_failure(self):
+ # Check that lessening bandwidth corresponds to failing
+ kc = self.keepClient()
+ loc = kc.put(self.DATA, copies=1, num_retries=0)
+ self.server.setbandwidth(0.5*self.BANDWIDTH_LOW_LIM)
+ with self.assertTakesGreater(self.TIMEOUT_TIME):
+ with self.assertRaises(arvados.errors.KeepReadError) as e:
+ kc.get(loc, num_retries=0)
+ with self.assertTakesGreater(self.TIMEOUT_TIME):
+ with self.assertRaises(arvados.errors.KeepWriteError):
+ kc.put(self.DATA, copies=1, num_retries=0)
+
+ def test_low_bandwidth_with_server_response_delay_failure(self):
+ kc = self.keepClient()
+ loc = kc.put(self.DATA, copies=1, num_retries=0)
+ self.server.setbandwidth(self.BANDWIDTH_LOW_LIM)
+ self.server.setdelays(response=self.TIMEOUT_TIME)
+ with self.assertTakesGreater(self.TIMEOUT_TIME):
+ with self.assertRaises(arvados.errors.KeepReadError) as e:
+ kc.get(loc, num_retries=0)
+ with self.assertTakesGreater(self.TIMEOUT_TIME):
+ with self.assertRaises(arvados.errors.KeepWriteError):
+ kc.put(self.DATA, copies=1, num_retries=0)
+ with self.assertTakesGreater(self.TIMEOUT_TIME):
+ with self.assertRaises(arvados.errors.KeepReadError) as e:
+ kc.head(loc, num_retries=0)
+
+ def test_low_bandwidth_with_server_mid_delay_failure(self):
+ kc = self.keepClient()
+ loc = kc.put(self.DATA, copies=1, num_retries=0)
+ self.server.setbandwidth(self.BANDWIDTH_LOW_LIM)
+ self.server.setdelays(mid_write=self.TIMEOUT_TIME, mid_read=self.TIMEOUT_TIME)
+ with self.assertTakesGreater(self.TIMEOUT_TIME):
+ with self.assertRaises(arvados.errors.KeepReadError) as e:
+ kc.get(loc, num_retries=0)
+ with self.assertTakesGreater(self.TIMEOUT_TIME):
+ with self.assertRaises(arvados.errors.KeepWriteError):
+ kc.put(self.DATA, copies=1, num_retries=0)
+
+ def test_timeout_slow_request(self):
+ loc = self.keepClient().put(self.DATA, copies=1, num_retries=0)
+ self.server.setdelays(request=.2)
+ self._test_connect_timeout_under_200ms(loc)
+ self.server.setdelays(request=2)
+ self._test_response_timeout_under_2s(loc)
+
+ def test_timeout_slow_response(self):
+ loc = self.keepClient().put(self.DATA, copies=1, num_retries=0)
+ self.server.setdelays(response=.2)
+ self._test_connect_timeout_under_200ms(loc)
+ self.server.setdelays(response=2)
+ self._test_response_timeout_under_2s(loc)
+
+ def test_timeout_slow_response_body(self):
+ loc = self.keepClient().put(self.DATA, copies=1, num_retries=0)
+ self.server.setdelays(response_body=.2)
+ self._test_connect_timeout_under_200ms(loc)
+ self.server.setdelays(response_body=2)
+ self._test_response_timeout_under_2s(loc)
+
+ def _test_connect_timeout_under_200ms(self, loc):
+ # Allow 100ms to connect, then 1s for response. Everything
+ # should work, and everything should take at least 200ms to
+ # return.
+ kc = self.keepClient(timeouts=(.1, 1))
+ with self.assertTakesBetween(.2, .3):
+ kc.put(self.DATA, copies=1, num_retries=0)
+ with self.assertTakesBetween(.2, .3):
+ self.assertEqual(self.DATA, kc.get(loc, num_retries=0))
+
+ def _test_response_timeout_under_2s(self, loc):
+ # Allow 10s to connect, then 1s for response. Nothing should
+ # work, and everything should take at least 1s to return.
+ kc = self.keepClient(timeouts=(10, 1))
+ with self.assertTakesBetween(1, 9):
+ with self.assertRaises(arvados.errors.KeepReadError):
+ kc.get(loc, num_retries=0)
+ with self.assertTakesBetween(1, 9):
+ 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))
+ self.assertEqual(True, self.keepClient.head(locator))
+
+ @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_head_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.head(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))
+
+ @mock.patch('pycurl.Curl')
+ def test_head_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(True, self.keepClient.head(locator))
+ self.assertEqual('https://keep.xyzzy.arvadosapi.com/'+locator,
+ MockCurl.return_value.getopt(pycurl.URL))
class KeepClientRetryTestMixin(object):
# 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'
self.assertRaises(error_class, self.run_method, *args, **kwargs)
def test_immediate_success(self):
- with tutil.mock_requestslib_responses(self.mock_method, self.DEFAULT_EXPECT, 200):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 200):
self.check_success()
def test_retry_then_success(self):
- with tutil.mock_requestslib_responses(self.mock_method, self.DEFAULT_EXPECT, 500, 200):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 200):
+ self.check_success(num_retries=3)
+
+ def test_exception_then_success(self):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, Exception('mock err'), 200):
self.check_success(num_retries=3)
def test_no_default_retry(self):
- with tutil.mock_requestslib_responses(self.mock_method, self.DEFAULT_EXPECT, 500, 200):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 200):
self.check_exception()
def test_no_retry_after_permanent_error(self):
- with tutil.mock_requestslib_responses(self.mock_method, self.DEFAULT_EXPECT, 403, 200):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 403, 200):
self.check_exception(num_retries=3)
def test_error_after_retries_exhausted(self):
- with tutil.mock_requestslib_responses(self.mock_method, self.DEFAULT_EXPECT, 500, 500, 200):
+ 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 tutil.mock_requestslib_responses(self.mock_method, self.DEFAULT_EXPECT, 500, 200):
+ with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 200):
self.check_success()
- def test_proxy_timeout(self):
- # Force a timeout, verifying that the requests.get or
- # requests.put method was called with the proxy_timeout
- # setting rather than the default timeout.
- force_timeout = [socket.timeout("timed out")]
- with mock.patch(self.mock_method, side_effect=force_timeout) as mock_request:
- self.check_exception()
- self.assertTrue(mock_request.called)
- self.assertEqual(
- arvados.KeepClient.DEFAULT_PROXY_TIMEOUT,
- mock_request.call_args[1]['timeout'])
-
-
-class KeepClientRetryGetTestMixin(KeepClientRetryTestMixin):
- mock_method = 'requests.get'
-
-
-class KeepClientRetryPutTestMixin(KeepClientRetryTestMixin):
- mock_method = 'requests.put'
-
@tutil.skip_sleep
-class KeepClientRetryGetTestCase(KeepClientRetryGetTestMixin, unittest.TestCase):
+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_get_responses(self.DEFAULT_EXPECT, 404, 200):
+ 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):
# 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_get_responses(self.DEFAULT_EXPECT, 404, 500):
+ 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(
"mixed errors raised NotFoundError")
def test_hint_server_can_succeed_without_retries(self):
- with tutil.mock_get_responses(self.DEFAULT_EXPECT, 404, 200, 500):
+ 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):
- side_effects = [
- socket.timeout("timed out"),
- tutil.fake_requests_response(200, self.DEFAULT_EXPECT)]
- with mock.patch('requests.get',
- side_effect=iter(side_effects)):
+ 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):
- side_effects = (tutil.fake_requests_response(200, s)
- for s in ['baddata', self.TEST_DATA])
- with mock.patch('requests.get', side_effect=side_effects):
+ with tutil.mock_keep_responses(
+ ('baddata', 200),
+ (self.DEFAULT_EXPECT, 200)):
self.check_success(locator=self.HINTED_LOCATOR)
+@tutil.skip_sleep
+class KeepClientRetryHeadTestCase(KeepClientRetryTestMixin, unittest.TestCase):
+ DEFAULT_EXPECT = True
+ 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().head(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):
+ # head 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.head(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)
@tutil.skip_sleep
-class KeepClientRetryPutTestCase(KeepClientRetryPutTestMixin, unittest.TestCase):
+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_put_responses(self.DEFAULT_EXPECT, 200):
+ with tutil.mock_keep_responses(self.DEFAULT_EXPECT, 200):
self.check_exception(copies=2, num_retries=3)
+
+
+class AvoidOverreplication(unittest.TestCase, tutil.ApiClientMock):
+
+ class FakeKeepService(object):
+ def __init__(self, delay, will_succeed=False, will_raise=None, replicas=1):
+ self.delay = delay
+ self.will_succeed = will_succeed
+ self.will_raise = will_raise
+ self._result = {}
+ self._result['headers'] = {}
+ self._result['headers']['x-keep-replicas-stored'] = str(replicas)
+ self._result['body'] = 'foobar'
+
+ def put(self, data_hash, data, timeout):
+ time.sleep(self.delay)
+ if self.will_raise is not None:
+ raise self.will_raise
+ return self.will_succeed
+
+ def last_result(self):
+ if self.will_succeed:
+ return self._result
+
+ def finished(self):
+ return False
+
+ def setUp(self):
+ self.copies = 3
+ self.pool = arvados.KeepClient.KeepWriterThreadPool(
+ data = 'foo',
+ data_hash = 'acbd18db4cc2f85cedef654fccc4a4d8+3',
+ max_service_replicas = self.copies,
+ copies = self.copies
+ )
+
+ def test_only_write_enough_on_success(self):
+ for i in range(10):
+ ks = self.FakeKeepService(delay=i/10.0, will_succeed=True)
+ self.pool.add_task(ks, None)
+ self.pool.join()
+ self.assertEqual(self.pool.done(), self.copies)
+
+ def test_only_write_enough_on_partial_success(self):
+ for i in range(5):
+ ks = self.FakeKeepService(delay=i/10.0, will_succeed=False)
+ self.pool.add_task(ks, None)
+ ks = self.FakeKeepService(delay=i/10.0, will_succeed=True)
+ self.pool.add_task(ks, None)
+ self.pool.join()
+ self.assertEqual(self.pool.done(), self.copies)
+
+ def test_only_write_enough_when_some_crash(self):
+ for i in range(5):
+ ks = self.FakeKeepService(delay=i/10.0, will_raise=Exception())
+ self.pool.add_task(ks, None)
+ ks = self.FakeKeepService(delay=i/10.0, will_succeed=True)
+ self.pool.add_task(ks, None)
+ self.pool.join()
+ self.assertEqual(self.pool.done(), self.copies)
+
+ def test_fail_when_too_many_crash(self):
+ for i in range(self.copies+1):
+ ks = self.FakeKeepService(delay=i/10.0, will_raise=Exception())
+ self.pool.add_task(ks, None)
+ for i in range(self.copies-1):
+ ks = self.FakeKeepService(delay=i/10.0, will_succeed=True)
+ self.pool.add_task(ks, None)
+ self.pool.join()
+ self.assertEqual(self.pool.done(), self.copies-1)
+
+
+@tutil.skip_sleep
+class RetryNeedsMultipleServices(unittest.TestCase, tutil.ApiClientMock):
+ # Test put()s that need two distinct servers to succeed, possibly
+ # requiring multiple passes through the retry loop.
+
+ def setUp(self):
+ self.api_client = self.mock_keep_services(count=2)
+ self.keep_client = arvados.KeepClient(api_client=self.api_client)
+
+ def test_success_after_exception(self):
+ with tutil.mock_keep_responses(
+ 'acbd18db4cc2f85cedef654fccc4a4d8+3',
+ Exception('mock err'), 200, 200) as req_mock:
+ self.keep_client.put('foo', num_retries=1, copies=2)
+ self.assertEqual(3, req_mock.call_count)
+
+ def test_success_after_retryable_error(self):
+ with tutil.mock_keep_responses(
+ 'acbd18db4cc2f85cedef654fccc4a4d8+3',
+ 500, 200, 200) as req_mock:
+ self.keep_client.put('foo', num_retries=1, copies=2)
+ self.assertEqual(3, req_mock.call_count)
+
+ def test_fail_after_final_error(self):
+ # First retry loop gets a 200 (can't achieve replication by
+ # storing again on that server) and a 400 (can't retry that
+ # server at all), so we shouldn't try a third request.
+ with tutil.mock_keep_responses(
+ 'acbd18db4cc2f85cedef654fccc4a4d8+3',
+ 200, 400, 200) as req_mock:
+ with self.assertRaises(arvados.errors.KeepWriteError):
+ self.keep_client.put('foo', num_retries=1, copies=2)
+ self.assertEqual(2, req_mock.call_count)
projects / arvados.git / blobdiff