From: david-sarah Date: Sat, 30 Jan 2010 06:43:03 +0000 (-0800) Subject: Improvements to test_hung_server, and fix for status updates in download.py X-Git-Url: https://git.rkrishnan.org/simplejson/components/%22file:/?a=commitdiff_plain;h=37a242e01af6cf76fc09a22e5dc2df5d912be98a;p=tahoe-lafs%2Ftahoe-lafs.git Improvements to test_hung_server, and fix for status updates in download.py --- diff --git a/src/allmydata/immutable/download.py b/src/allmydata/immutable/download.py index 9262da85..b410fc59 100644 --- a/src/allmydata/immutable/download.py +++ b/src/allmydata/immutable/download.py @@ -903,8 +903,8 @@ class CiphertextDownloader(log.PrefixingLogMixin): if self._status: self._status.set_status("Locating Shares (%d/%d)" % - (len(self._share_buckets), - self._verifycap.needed_shares)) + (self._responses_received, + self._total_queries)) return wait_for_enough_buckets_d def _check_got_all_responses(self, ignored=None): @@ -914,6 +914,8 @@ class CiphertextDownloader(log.PrefixingLogMixin): self._wait_for_enough_buckets_d = None def _got_response(self, buckets, peerid): + # Note that this can continue to receive responses after _wait_for_enough_buckets_d + # has fired. self._responses_received += 1 self.log(format="got results from [%(peerid)s]: shnums %(shnums)s", peerid=idlib.shortnodeid_b2a(peerid), diff --git a/src/allmydata/test/test_hung_server.py b/src/allmydata/test/test_hung_server.py index ce34cba7..d0ba9956 100644 --- a/src/allmydata/test/test_hung_server.py +++ b/src/allmydata/test/test_hung_server.py @@ -2,10 +2,10 @@ import os, shutil from twisted.trial import unittest from twisted.internet import defer, reactor -from twisted.python import failure from allmydata import uri from allmydata.util.consumer import download_to_data from allmydata.immutable import upload +from allmydata.mutable.common import UnrecoverableFileError from allmydata.storage.common import storage_index_to_dir from allmydata.test.no_network import GridTestMixin from allmydata.test.common import ShouldFailMixin @@ -31,26 +31,15 @@ class HungServerDownloadTest(GridTestMixin, ShouldFailMixin, unittest.TestCase): if i_serverid in serverids: os.unlink(i_sharefile) - # untested - def _pick_a_share_from(self, server): - (id, ss) = server - for (i_shnum, i_serverid, i_sharefile) in self.shares: - if i_serverid == id: - return (i_shnum, i_sharefile) - raise AssertionError("server %r had no shares" % server) - - # untested def _copy_all_shares_from(self, from_servers, to_server): serverids = [id for (id, ss) in from_servers] for (i_shnum, i_serverid, i_sharefile) in self.shares: if i_serverid in serverids: self._copy_share((i_shnum, i_sharefile), to_server) - # untested def _copy_share(self, share, to_server): (sharenum, sharefile) = share (id, ss) = to_server - # FIXME: this doesn't work because we only have a LocalWrapper shares_dir = os.path.join(ss.original.storedir, "shares") si = uri.from_string(self.uri).get_storage_index() si_dir = os.path.join(shares_dir, storage_index_to_dir(si)) @@ -63,95 +52,144 @@ class HungServerDownloadTest(GridTestMixin, ShouldFailMixin, unittest.TestCase): self.failUnless((sharenum, ss.original.my_nodeid, new_sharefile) in self.shares) - # untested - def _add_server(self, server_number, readonly=False): - ss = self.g.make_server(server_number, readonly) - self.g.add_server(server_number, ss) - self.shares = self.find_shares(self.uri) + def _set_up(self, mutable, testdir, num_clients=1, num_servers=10): + self.mutable = mutable + if mutable: + self.basedir = "hung_server/mutable_" + testdir + else: + self.basedir = "hung_server/immutable_" + testdir - def _set_up(self, testdir, num_clients=1, num_servers=10): - self.basedir = "download/" + testdir self.set_up_grid(num_clients=num_clients, num_servers=num_servers) self.c0 = self.g.clients[0] - sb = self.c0.nodemaker.storage_broker - self.servers = [(id, ss) for (id, ss) in sb.get_all_servers()] - - data = upload.Data(immutable_plaintext, convergence="") - d = self.c0.upload(data) - def _uploaded(ur): - self.uri = ur.uri - self.shares = self.find_shares(self.uri) - d.addCallback(_uploaded) + nm = self.c0.nodemaker + self.servers = [(id, ss) for (id, ss) in nm.storage_broker.get_all_servers()] + + if mutable: + d = nm.create_mutable_file(mutable_plaintext) + def _uploaded_mutable(node): + self.uri = node.get_uri() + self.shares = self.find_shares(self.uri) + d.addCallback(_uploaded_mutable) + else: + data = upload.Data(immutable_plaintext, convergence="") + d = self.c0.upload(data) + def _uploaded_immutable(upload_res): + self.uri = upload_res.uri + self.shares = self.find_shares(self.uri) + d.addCallback(_uploaded_immutable) return d - def test_10_good_sanity_check(self): - d = self._set_up("test_10_good_sanity_check") - d.addCallback(lambda ign: self.download_immutable()) + def _check_download(self): + n = self.c0.create_node_from_uri(self.uri) + if self.mutable: + d = n.download_best_version() + expected_plaintext = mutable_plaintext + else: + d = download_to_data(n) + expected_plaintext = immutable_plaintext + def _got_data(data): + self.failUnlessEqual(data, expected_plaintext) + d.addCallback(_got_data) return d - def test_3_good_7_hung(self): - d = self._set_up("test_3_good_7_hung") - d.addCallback(lambda ign: self._hang(self.servers[3:])) - d.addCallback(lambda ign: self.download_immutable()) + def _should_fail_download(self): + if self.mutable: + return self.shouldFail(UnrecoverableFileError, self.basedir, + "no recoverable versions", + self._check_download) + else: + return self.shouldFail(NotEnoughSharesError, self.basedir, + "Failed to get enough shareholders", + self._check_download) + + + def test_10_good_sanity_check(self): + d = defer.succeed(None) + for mutable in [False, True]: + d.addCallback(lambda ign: self._set_up(mutable, "test_10_good_sanity_check")) + d.addCallback(lambda ign: self._check_download()) return d + def test_10_good_copied_share(self): + d = defer.succeed(None) + for mutable in [False, True]: + d.addCallback(lambda ign: self._set_up(mutable, "test_10_good_copied_share")) + d.addCallback(lambda ign: self._copy_all_shares_from(self.servers[2:3], self.servers[0])) + d.addCallback(lambda ign: self._check_download()) + return d + def test_3_good_7_noshares(self): - d = self._set_up("test_3_good_7_noshares") - d.addCallback(lambda ign: self._delete_all_shares_from(self.servers[3:])) - d.addCallback(lambda ign: self.download_immutable()) + d = defer.succeed(None) + for mutable in [False, True]: + d.addCallback(lambda ign: self._set_up(mutable, "test_3_good_7_noshares")) + d.addCallback(lambda ign: self._delete_all_shares_from(self.servers[3:])) + d.addCallback(lambda ign: self._check_download()) return d def test_2_good_8_broken_fail(self): - d = self._set_up("test_2_good_8_broken_fail") - d.addCallback(lambda ign: self._break(self.servers[2:])) - d.addCallback(lambda ign: - self.shouldFail(NotEnoughSharesError, "test_2_good_8_broken_fail", - "Failed to get enough shareholders: have 2, need 3", - self.download_immutable)) + d = defer.succeed(None) + for mutable in [False, True]: + d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_broken_fail")) + d.addCallback(lambda ign: self._break(self.servers[2:])) + d.addCallback(lambda ign: self._should_fail_download()) return d def test_2_good_8_noshares_fail(self): - d = self._set_up("test_2_good_8_noshares_fail") - d.addCallback(lambda ign: self._delete_all_shares_from(self.servers[2:])) - d.addCallback(lambda ign: - self.shouldFail(NotEnoughSharesError, "test_2_good_8_noshares_fail", - "Failed to get enough shareholders: have 2, need 3", - self.download_immutable)) + d = defer.succeed(None) + for mutable in [False, True]: + d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_noshares_fail")) + d.addCallback(lambda ign: self._delete_all_shares_from(self.servers[2:])) + d.addCallback(lambda ign: self._should_fail_download()) return d - def test_2_good_8_hung_then_1_recovers(self): - recovered = defer.Deferred() - d = self._set_up("test_2_good_8_hung_then_1_recovers") - d.addCallback(lambda ign: self._hang(self.servers[2:3], until=recovered)) - d.addCallback(lambda ign: self._hang(self.servers[3:])) - d.addCallback(lambda ign: self.download_immutable()) - reactor.callLater(5, recovered.callback, None) + def test_2_good_8_broken_copied_share(self): + d = defer.succeed(None) + for mutable in [False, True]: + d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_broken_copied_share")) + d.addCallback(lambda ign: self._copy_all_shares_from(self.servers[2:3], self.servers[0])) + d.addCallback(lambda ign: self._break(self.servers[2:])) + d.addCallback(lambda ign: self._check_download()) return d - def test_2_good_8_hung_then_1_recovers_with_2_shares(self): - recovered = defer.Deferred() - d = self._set_up("test_2_good_8_hung_then_1_recovers_with_2_shares") - d.addCallback(lambda ign: self._copy_all_shares_from(self.servers[0:1], self.servers[2])) - d.addCallback(lambda ign: self._hang(self.servers[2:3], until=recovered)) - d.addCallback(lambda ign: self._hang(self.servers[3:])) - d.addCallback(lambda ign: self.download_immutable()) - reactor.callLater(5, recovered.callback, None) + def test_2_good_8_broken_duplicate_share_fail(self): + d = defer.succeed(None) + for mutable in [False, True]: + d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_broken_duplicate_share_fail")) + d.addCallback(lambda ign: self._copy_all_shares_from(self.servers[1:2], self.servers[0])) + d.addCallback(lambda ign: self._break(self.servers[2:])) + d.addCallback(lambda ign: self._should_fail_download()) return d - def download_immutable(self): - n = self.c0.create_node_from_uri(self.uri) - d = download_to_data(n) - def _got_data(data): - self.failUnlessEqual(data, immutable_plaintext) - d.addCallback(_got_data) + # The tests below do not currently pass for mutable files. + + def test_3_good_7_hung(self): + d = defer.succeed(None) + for mutable in [False]: + d.addCallback(lambda ign: self._set_up(mutable, "test_3_good_7_hung")) + d.addCallback(lambda ign: self._hang(self.servers[3:])) + d.addCallback(lambda ign: self._check_download()) return d - # unused - def download_mutable(self): - n = self.c0.create_node_from_uri(self.uri) - d = n.download_best_version() - def _got_data(data): - self.failUnlessEqual(data, mutable_plaintext) - d.addCallback(_got_data) + def test_2_good_8_hung_then_1_recovers(self): + d = defer.succeed(None) + for mutable in [False]: + recovered = defer.Deferred() + d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_hung_then_1_recovers")) + d.addCallback(lambda ign: self._hang(self.servers[2:3], until=recovered)) + d.addCallback(lambda ign: self._hang(self.servers[3:])) + d.addCallback(lambda ign: reactor.callLater(5, recovered.callback, None)) + d.addCallback(lambda ign: self._check_download()) + return d + + def test_2_good_8_hung_then_1_recovers_with_2_shares(self): + d = defer.succeed(None) + for mutable in [False]: + recovered = defer.Deferred() + d.addCallback(lambda ign: self._set_up(mutable, "test_2_good_8_hung_then_1_recovers_with_2_shares")) + d.addCallback(lambda ign: self._copy_all_shares_from(self.servers[0:1], self.servers[2])) + d.addCallback(lambda ign: self._hang(self.servers[2:3], until=recovered)) + d.addCallback(lambda ign: self._hang(self.servers[3:])) + d.addCallback(lambda ign: reactor.callLater(5, recovered.callback, None)) + d.addCallback(lambda ign: self._check_download()) return d