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Merge #16740: qa: Relax so that the subscriber is ready before publishing zmq messages

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403e372407 qa: Relax so that the subscriber is ready before publishing zmq messages (João Barbosa)

Pull request description:

  Prevents the syndrome "slow joiner" - see http://zguide.zeromq.org/py:all#sockets-and-patterns - by relaxing before publishing messages.

ACKs for top commit:
  MarcoFalke:
    unsigned ACK 403e372407

Tree-SHA512: 0e856accbc450a9b09160bdce5112b2103dc9436cc317d31fb1c9634ebd76823a300a2e727818057fb4d0a615271772ff23e80553a13e9aa1935500de5eeec5f
This commit is contained in:
MarcoFalke 2019-08-28 13:30:55 -04:00
commit 119e97ae2d
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1 changed files with 7 additions and 2 deletions
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9
test/functional/interface_zmq.py
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@ -10,6 +10,7 @@ from test_framework.test_framework import BitcoinTestFramework
from test_framework.messages import CTransaction, hash256
from test_framework.util import assert_equal, connect_nodes
from io import BytesIO
from time import sleep
def hash256_reversed(byte_str):
return hash256(byte_str)[::-1]
@ -61,7 +62,6 @@ class ZMQTest (BitcoinTestFramework):
address = 'tcp://127.0.0.1:28332'
socket = self.ctx.socket(zmq.SUB)
socket.set(zmq.RCVTIMEO, 60000)
socket.connect(address)
# Subscribe to all available topics.
hashblock = ZMQSubscriber(socket, b"hashblock")
@ -71,6 +71,9 @@ class ZMQTest (BitcoinTestFramework):
self.restart_node(0, ["-zmqpub%s=%s" % (sub.topic.decode(), address) for sub in [hashblock, hashtx, rawblock, rawtx]])
connect_nodes(self.nodes[0], 1)
socket.connect(address)
# Relax so that the subscriber is ready before publishing zmq messages
sleep(0.2)
num_blocks = 5
self.log.info("Generate %(n)d blocks (and %(n)d coinbase txes)" % {"n": num_blocks})
@ -128,11 +131,13 @@ class ZMQTest (BitcoinTestFramework):
address = 'tcp://127.0.0.1:28333'
socket = self.ctx.socket(zmq.SUB)
socket.set(zmq.RCVTIMEO, 60000)
socket.connect(address)
hashblock = ZMQSubscriber(socket, b'hashblock')
# Should only notify the tip if a reorg occurs
self.restart_node(0, ['-zmqpub%s=%s' % (hashblock.topic.decode(), address)])
socket.connect(address)
# Relax so that the subscriber is ready before publishing zmq messages
sleep(0.2)
# Generate 1 block in nodes[0] and receive all notifications
self.nodes[0].generatetoaddress(1, ADDRESS_BCRT1_UNSPENDABLE)