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Merge #11707: [tests] Fix sendheaders

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9d42cc333 [tests] address review comments (John Newbery)
f0c4ab9a7 [tests] fix flakiness in sendheaders.py (John Newbery)
25fd6e2c2 [tests] refactor check_last_announcement() in sendheaders.py (John Newbery)
f39d4bbd1 [tests] tidy up BaseNode in sendheaders.py (John Newbery)
2613c545f [tests] fix flake8 warnings in sendheaders.py (John Newbery)

Pull request description:

  This PR should fix the intermittent failure of sendheaders.py described in #11673. The first three commits are tidying up and refactoring the file. The final commit _fix flakiness in sendheaders.py_ fixes the intermittent failures. The commit message for that commit describes the problems that are being fixed.

  I think @laanwj @MeshCollider @MarcoFalke have seen these failures.

  fixes #11673

Tree-SHA512: 278e1af85f2eae00f970f2d8ef33686dd52b4f62180dea4cfdaff7bcf3287c6f1c2930355d99461a12f0c51c4d42cc3b1cb3275174134028ca4d06ffc24c18dd
This commit is contained in:
MarcoFalke 2017-11-18 17:30:14 -05:00
commit 0d89fa0877
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1 changed files with 141 additions and 121 deletions
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262
test/functional/sendheaders.py
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@ -4,11 +4,13 @@
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test behavior of headers messages to announce blocks.
Setup:
Setup:
- Two nodes, two p2p connections to node0. One p2p connection should only ever
receive inv's (omitted from testing description below, this is our control).
Second node is used for creating reorgs.
- Two nodes:
- node0 is the node-under-test. We create two p2p connections to it. The
first p2p connection is a control and should only ever receive inv's. The
second p2p connection tests the headers sending logic.
- node1 is used to create reorgs.
test_null_locators
==================
@ -83,35 +85,45 @@ d. Announce 49 headers that don't connect.
e. Announce one more that doesn't connect.
Expect: disconnect.
"""
from test_framework.mininode import *
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import *
from test_framework.blocktools import create_block, create_coinbase
from test_framework.mininode import (
CBlockHeader,
CInv,
NODE_WITNESS,
NetworkThread,
NodeConnCB,
mininode_lock,
msg_block,
msg_getblocks,
msg_getdata,
msg_getheaders,
msg_headers,
msg_inv,
msg_sendheaders,
)
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
sync_blocks,
wait_until,
)
DIRECT_FETCH_RESPONSE_TIME = 0.05
direct_fetch_response_time = 0.05
class TestNode(NodeConnCB):
class BaseNode(NodeConnCB):
def __init__(self):
super().__init__()
self.block_announced = False
self.last_blockhash_announced = None
def clear_last_announcement(self):
with mininode_lock:
self.block_announced = False
self.last_message.pop("inv", None)
self.last_message.pop("headers", None)
# Request data for a list of block hashes
def get_data(self, block_hashes):
def send_get_data(self, block_hashes):
"""Request data for a list of block hashes."""
msg = msg_getdata()
for x in block_hashes:
msg.inv.append(CInv(2, x))
self.connection.send_message(msg)
def get_headers(self, locator, hashstop):
def send_get_headers(self, locator, hashstop):
msg = msg_getheaders()
msg.locator.vHave = locator
msg.hashstop = hashstop
@ -122,6 +134,27 @@ class TestNode(NodeConnCB):
msg.inv = [CInv(2, blockhash)]
self.connection.send_message(msg)
def send_header_for_blocks(self, new_blocks):
headers_message = msg_headers()
headers_message.headers = [CBlockHeader(b) for b in new_blocks]
self.send_message(headers_message)
def send_getblocks(self, locator):
getblocks_message = msg_getblocks()
getblocks_message.locator.vHave = locator
self.send_message(getblocks_message)
def wait_for_getdata(self, hash_list, timeout=60):
if hash_list == []:
return
test_function = lambda: "getdata" in self.last_message and [x.hash for x in self.last_message["getdata"].inv] == hash_list
wait_until(test_function, timeout=timeout, lock=mininode_lock)
def wait_for_block_announcement(self, block_hash, timeout=60):
test_function = lambda: self.last_blockhash_announced == block_hash
wait_until(test_function, timeout=timeout, lock=mininode_lock)
def on_inv(self, conn, message):
self.block_announced = True
self.last_blockhash_announced = message.inv[-1].hash
@ -132,97 +165,79 @@ class TestNode(NodeConnCB):
message.headers[-1].calc_sha256()
self.last_blockhash_announced = message.headers[-1].sha256
# Test whether the last announcement we received had the
# right header or the right inv
# inv and headers should be lists of block hashes
def clear_last_announcement(self):
with mininode_lock:
self.block_announced = False
self.last_message.pop("inv", None)
self.last_message.pop("headers", None)
def check_last_announcement(self, headers=None, inv=None):
expect_headers = headers if headers != None else []
expect_inv = inv if inv != None else []
"""Test whether the last announcement received had the right header or the right inv.
inv and headers should be lists of block hashes."""
test_function = lambda: self.block_announced
wait_until(test_function, timeout=60, lock=mininode_lock)
with mininode_lock:
self.block_announced = False
success = True
compare_inv = []
if "inv" in self.last_message:
compare_inv = [x.hash for x in self.last_message["inv"].inv]
if compare_inv != expect_inv:
success = False
if inv is not None:
assert_equal(compare_inv, inv)
hash_headers = []
compare_headers = []
if "headers" in self.last_message:
# treat headers as a list of block hashes
hash_headers = [ x.sha256 for x in self.last_message["headers"].headers ]
if hash_headers != expect_headers:
success = False
compare_headers = [x.sha256 for x in self.last_message["headers"].headers]
if headers is not None:
assert_equal(compare_headers, headers)
self.last_message.pop("inv", None)
self.last_message.pop("headers", None)
return success
def wait_for_getdata(self, hash_list, timeout=60):
if hash_list == []:
return
test_function = lambda: "getdata" in self.last_message and [x.hash for x in self.last_message["getdata"].inv] == hash_list
wait_until(test_function, timeout=timeout, lock=mininode_lock)
return
def wait_for_block_announcement(self, block_hash, timeout=60):
test_function = lambda: self.last_blockhash_announced == block_hash
wait_until(test_function, timeout=timeout, lock=mininode_lock)
return
def send_header_for_blocks(self, new_blocks):
headers_message = msg_headers()
headers_message.headers = [ CBlockHeader(b) for b in new_blocks ]
self.send_message(headers_message)
def send_getblocks(self, locator):
getblocks_message = msg_getblocks()
getblocks_message.locator.vHave = locator
self.send_message(getblocks_message)
class SendHeadersTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 2
# mine count blocks and return the new tip
def mine_blocks(self, count):
"""Mine count blocks and return the new tip."""
# Clear out last block announcement from each p2p listener
[x.clear_last_announcement() for x in self.nodes[0].p2ps]
self.nodes[0].generate(count)
return int(self.nodes[0].getbestblockhash(), 16)
# mine a reorg that invalidates length blocks (replacing them with
# length+1 blocks).
# Note: we clear the state of our p2p connections after the
# to-be-reorged-out blocks are mined, so that we don't break later tests.
# return the list of block hashes newly mined
def mine_reorg(self, length):
self.nodes[0].generate(length) # make sure all invalidated blocks are node0's
"""Mine a reorg that invalidates length blocks (replacing them with # length+1 blocks).
Note: we clear the state of our p2p connections after the
to-be-reorged-out blocks are mined, so that we don't break later tests.
return the list of block hashes newly mined."""
self.nodes[0].generate(length) # make sure all invalidated blocks are node0's
sync_blocks(self.nodes, wait=0.1)
for x in self.nodes[0].p2ps:
x.wait_for_block_announcement(int(self.nodes[0].getbestblockhash(), 16))
x.clear_last_announcement()
tip_height = self.nodes[1].getblockcount()
hash_to_invalidate = self.nodes[1].getblockhash(tip_height-(length-1))
hash_to_invalidate = self.nodes[1].getblockhash(tip_height - (length - 1))
self.nodes[1].invalidateblock(hash_to_invalidate)
all_hashes = self.nodes[1].generate(length+1) # Must be longer than the orig chain
all_hashes = self.nodes[1].generate(length + 1) # Must be longer than the orig chain
sync_blocks(self.nodes, wait=0.1)
return [int(x, 16) for x in all_hashes]
def run_test(self):
# Setup the p2p connections and start up the network thread.
inv_node = self.nodes[0].add_p2p_connection(TestNode())
# Set nServices to 0 for test_node, so no block download will occur outside of
# direct fetching
test_node = self.nodes[0].add_p2p_connection(TestNode(), services=NODE_WITNESS)
inv_node = self.nodes[0].add_p2p_connection(BaseNode())
# Make sure NODE_NETWORK is not set for test_node, so no block download
# will occur outside of direct fetching
test_node = self.nodes[0].add_p2p_connection(BaseNode(), services=NODE_WITNESS)
NetworkThread().start() # Start up network handling in another thread
NetworkThread().start() # Start up network handling in another thread
# Test logic begins here
inv_node.wait_for_verack()
@ -232,27 +247,32 @@ class SendHeadersTest(BitcoinTestFramework):
inv_node.sync_with_ping()
test_node.sync_with_ping()
self.test_null_locators(test_node)
self.test_null_locators(test_node, inv_node)
self.test_nonnull_locators(test_node, inv_node)
def test_null_locators(self, test_node):
def test_null_locators(self, test_node, inv_node):
tip = self.nodes[0].getblockheader(self.nodes[0].generate(1)[0])
tip_hash = int(tip["hash"], 16)
inv_node.check_last_announcement(inv=[tip_hash], headers=[])
test_node.check_last_announcement(inv=[tip_hash], headers=[])
self.log.info("Verify getheaders with null locator and valid hashstop returns headers.")
test_node.clear_last_announcement()
test_node.get_headers(locator=[], hashstop=tip_hash)
assert_equal(test_node.check_last_announcement(headers=[tip_hash]), True)
test_node.send_get_headers(locator=[], hashstop=tip_hash)
test_node.check_last_announcement(headers=[tip_hash])
self.log.info("Verify getheaders with null locator and invalid hashstop does not return headers.")
block = create_block(int(tip["hash"], 16), create_coinbase(tip["height"] + 1), tip["mediantime"] + 1)
block.solve()
test_node.send_header_for_blocks([block])
test_node.clear_last_announcement()
test_node.get_headers(locator=[], hashstop=int(block.hash, 16))
test_node.send_get_headers(locator=[], hashstop=int(block.hash, 16))
test_node.sync_with_ping()
assert_equal(test_node.block_announced, False)
inv_node.clear_last_announcement()
test_node.send_message(msg_block(block))
inv_node.check_last_announcement(inv=[int(block.hash, 16)], headers=[])
def test_nonnull_locators(self, test_node, inv_node):
tip = int(self.nodes[0].getbestblockhash(), 16)
@ -263,30 +283,30 @@ class SendHeadersTest(BitcoinTestFramework):
for i in range(4):
old_tip = tip
tip = self.mine_blocks(1)
assert_equal(inv_node.check_last_announcement(inv=[tip]), True)
assert_equal(test_node.check_last_announcement(inv=[tip]), True)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(inv=[tip], headers=[])
# Try a few different responses; none should affect next announcement
if i == 0:
# first request the block
test_node.get_data([tip])
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
elif i == 1:
# next try requesting header and block
test_node.get_headers(locator=[old_tip], hashstop=tip)
test_node.get_data([tip])
test_node.send_get_headers(locator=[old_tip], hashstop=tip)
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
test_node.clear_last_announcement() # since we requested headers...
test_node.clear_last_announcement() # since we requested headers...
elif i == 2:
# this time announce own block via headers
height = self.nodes[0].getblockcount()
last_time = self.nodes[0].getblock(self.nodes[0].getbestblockhash())['time']
block_time = last_time + 1
new_block = create_block(tip, create_coinbase(height+1), block_time)
new_block = create_block(tip, create_coinbase(height + 1), block_time)
new_block.solve()
test_node.send_header_for_blocks([new_block])
test_node.wait_for_getdata([new_block.sha256])
test_node.send_message(msg_block(new_block))
test_node.sync_with_ping() # make sure this block is processed
test_node.sync_with_ping() # make sure this block is processed
inv_node.clear_last_announcement()
test_node.clear_last_announcement()
@ -297,15 +317,15 @@ class SendHeadersTest(BitcoinTestFramework):
# commence and keep working.
test_node.send_message(msg_sendheaders())
prev_tip = int(self.nodes[0].getbestblockhash(), 16)
test_node.get_headers(locator=[prev_tip], hashstop=0)
test_node.send_get_headers(locator=[prev_tip], hashstop=0)
test_node.sync_with_ping()
# Now that we've synced headers, headers announcements should work
tip = self.mine_blocks(1)
assert_equal(inv_node.check_last_announcement(inv=[tip]), True)
assert_equal(test_node.check_last_announcement(headers=[tip]), True)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(headers=[tip])
height = self.nodes[0].getblockcount()+1
height = self.nodes[0].getblockcount() + 1
block_time += 10 # Advance far enough ahead
for i in range(10):
# Mine i blocks, and alternate announcing either via
@ -314,7 +334,7 @@ class SendHeadersTest(BitcoinTestFramework):
# with block header, even though the blocks are never requested
for j in range(2):
blocks = []
for b in range(i+1):
for b in range(i + 1):
blocks.append(create_block(tip, create_coinbase(height), block_time))
blocks[-1].solve()
tip = blocks[-1].sha256
@ -328,7 +348,7 @@ class SendHeadersTest(BitcoinTestFramework):
test_node.send_header_for_blocks(blocks)
# Test that duplicate inv's won't result in duplicate
# getdata requests, or duplicate headers announcements
[ inv_node.send_block_inv(x.sha256) for x in blocks ]
[inv_node.send_block_inv(x.sha256) for x in blocks]
test_node.wait_for_getdata([x.sha256 for x in blocks])
inv_node.sync_with_ping()
else:
@ -339,7 +359,7 @@ class SendHeadersTest(BitcoinTestFramework):
# getdata requests (the check is further down)
inv_node.send_header_for_blocks(blocks)
inv_node.sync_with_ping()
[ test_node.send_message(msg_block(x)) for x in blocks ]
[test_node.send_message(msg_block(x)) for x in blocks]
test_node.sync_with_ping()
inv_node.sync_with_ping()
# This block should not be announced to the inv node (since it also
@ -347,8 +367,8 @@ class SendHeadersTest(BitcoinTestFramework):
assert "inv" not in inv_node.last_message
assert "headers" not in inv_node.last_message
tip = self.mine_blocks(1)
assert_equal(inv_node.check_last_announcement(inv=[tip]), True)
assert_equal(test_node.check_last_announcement(headers=[tip]), True)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(headers=[tip])
height += 1
block_time += 1
@ -362,16 +382,16 @@ class SendHeadersTest(BitcoinTestFramework):
# First try mining a reorg that can propagate with header announcement
new_block_hashes = self.mine_reorg(length=7)
tip = new_block_hashes[-1]
assert_equal(inv_node.check_last_announcement(inv=[tip]), True)
assert_equal(test_node.check_last_announcement(headers=new_block_hashes), True)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(headers=new_block_hashes)
block_time += 8
block_time += 8
# Mine a too-large reorg, which should be announced with a single inv
new_block_hashes = self.mine_reorg(length=8)
tip = new_block_hashes[-1]
assert_equal(inv_node.check_last_announcement(inv=[tip]), True)
assert_equal(test_node.check_last_announcement(inv=[tip]), True)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(inv=[tip], headers=[])
block_time += 9
@ -379,42 +399,42 @@ class SendHeadersTest(BitcoinTestFramework):
fork_point = int(fork_point, 16)
# Use getblocks/getdata
test_node.send_getblocks(locator = [fork_point])
assert_equal(test_node.check_last_announcement(inv=new_block_hashes), True)
test_node.get_data(new_block_hashes)
test_node.send_getblocks(locator=[fork_point])
test_node.check_last_announcement(inv=new_block_hashes, headers=[])
test_node.send_get_data(new_block_hashes)
test_node.wait_for_block(new_block_hashes[-1])
for i in range(3):
# Mine another block, still should get only an inv
tip = self.mine_blocks(1)
assert_equal(inv_node.check_last_announcement(inv=[tip]), True)
assert_equal(test_node.check_last_announcement(inv=[tip]), True)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(inv=[tip], headers=[])
if i == 0:
# Just get the data -- shouldn't cause headers announcements to resume
test_node.get_data([tip])
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
elif i == 1:
# Send a getheaders message that shouldn't trigger headers announcements
# to resume (best header sent will be too old)
test_node.get_headers(locator=[fork_point], hashstop=new_block_hashes[1])
test_node.get_data([tip])
test_node.send_get_headers(locator=[fork_point], hashstop=new_block_hashes[1])
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
elif i == 2:
test_node.get_data([tip])
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
# This time, try sending either a getheaders to trigger resumption
# of headers announcements, or mine a new block and inv it, also
# of headers announcements, or mine a new block and inv it, also
# triggering resumption of headers announcements.
if j == 0:
test_node.get_headers(locator=[tip], hashstop=0)
test_node.send_get_headers(locator=[tip], hashstop=0)
test_node.sync_with_ping()
else:
test_node.send_block_inv(tip)
test_node.sync_with_ping()
# New blocks should now be announced with header
tip = self.mine_blocks(1)
assert_equal(inv_node.check_last_announcement(inv=[tip]), True)
assert_equal(test_node.check_last_announcement(headers=[tip]), True)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(headers=[tip])
self.log.info("Part 3: success!")
@ -434,7 +454,7 @@ class SendHeadersTest(BitcoinTestFramework):
height += 1
inv_node.send_message(msg_block(blocks[-1]))
inv_node.sync_with_ping() # Make sure blocks are processed
inv_node.sync_with_ping() # Make sure blocks are processed
test_node.last_message.pop("getdata", None)
test_node.send_header_for_blocks(blocks)
test_node.sync_with_ping()
@ -453,9 +473,9 @@ class SendHeadersTest(BitcoinTestFramework):
test_node.send_header_for_blocks(blocks)
test_node.sync_with_ping()
test_node.wait_for_getdata([x.sha256 for x in blocks], timeout=direct_fetch_response_time)
test_node.wait_for_getdata([x.sha256 for x in blocks], timeout=DIRECT_FETCH_RESPONSE_TIME)
[ test_node.send_message(msg_block(x)) for x in blocks ]
[test_node.send_message(msg_block(x)) for x in blocks]
test_node.sync_with_ping()
@ -484,13 +504,13 @@ class SendHeadersTest(BitcoinTestFramework):
# both blocks (same work as tip)
test_node.send_header_for_blocks(blocks[1:2])
test_node.sync_with_ping()
test_node.wait_for_getdata([x.sha256 for x in blocks[0:2]], timeout=direct_fetch_response_time)
test_node.wait_for_getdata([x.sha256 for x in blocks[0:2]], timeout=DIRECT_FETCH_RESPONSE_TIME)
# Announcing 16 more headers should trigger direct fetch for 14 more
# blocks
test_node.send_header_for_blocks(blocks[2:18])
test_node.sync_with_ping()
test_node.wait_for_getdata([x.sha256 for x in blocks[2:16]], timeout=direct_fetch_response_time)
test_node.wait_for_getdata([x.sha256 for x in blocks[2:16]], timeout=DIRECT_FETCH_RESPONSE_TIME)
# Announcing 1 more header should not trigger any response
test_node.last_message.pop("getdata", None)
@ -502,7 +522,7 @@ class SendHeadersTest(BitcoinTestFramework):
self.log.info("Part 4: success!")
# Now deliver all those blocks we announced.
[ test_node.send_message(msg_block(x)) for x in blocks ]
[test_node.send_message(msg_block(x)) for x in blocks]
self.log.info("Part 5: Testing handling of unconnecting headers")
# First we test that receipt of an unconnecting header doesn't prevent
@ -524,7 +544,7 @@ class SendHeadersTest(BitcoinTestFramework):
test_node.wait_for_getheaders()
test_node.send_header_for_blocks(blocks)
test_node.wait_for_getdata([x.sha256 for x in blocks])
[ test_node.send_message(msg_block(x)) for x in blocks ]
[test_node.send_message(msg_block(x)) for x in blocks]
test_node.sync_with_ping()
assert_equal(int(self.nodes[0].getbestblockhash(), 16), blocks[1].sha256)
@ -532,7 +552,7 @@ class SendHeadersTest(BitcoinTestFramework):
# Now we test that if we repeatedly don't send connecting headers, we
# don't go into an infinite loop trying to get them to connect.
MAX_UNCONNECTING_HEADERS = 10
for j in range(MAX_UNCONNECTING_HEADERS+1):
for j in range(MAX_UNCONNECTING_HEADERS + 1):
blocks.append(create_block(tip, create_coinbase(height), block_time))
blocks[-1].solve()
tip = blocks[-1].sha256
@ -554,11 +574,11 @@ class SendHeadersTest(BitcoinTestFramework):
# Now try to see how many unconnecting headers we can send
# before we get disconnected. Should be 5*MAX_UNCONNECTING_HEADERS
for i in range(5*MAX_UNCONNECTING_HEADERS - 1):
for i in range(5 * MAX_UNCONNECTING_HEADERS - 1):
# Send a header that doesn't connect, check that we get a getheaders.
with mininode_lock:
test_node.last_message.pop("getheaders", None)
test_node.send_header_for_blocks([blocks[i%len(blocks)]])
test_node.send_header_for_blocks([blocks[i % len(blocks)]])
test_node.wait_for_getheaders()
# Eventually this stops working.