forked from LBRYCommunity/lbry-sdk
Merge pull request #3599 from moodyjon/async-for-pr3504
Tighten up IterativeFinder async close behavior (DHT iterator continues after consumer breaks out of it)
This commit is contained in:
Victor Shyba
GitHub
commit
1d95eb1549
|
|
@ -5,7 +5,7 @@ import socket
|
|||
|
||||
from prometheus_client import Gauge
|
||||
|
||||
from lbry.utils import resolve_host
|
||||
from lbry.utils import aclosing, resolve_host
|
||||
from lbry.dht import constants
|
||||
from lbry.dht.peer import make_kademlia_peer
|
||||
from lbry.dht.protocol.distance import Distance
|
||||
|
|
@ -217,9 +217,10 @@ class Node:
|
|||
shortlist: typing.Optional[typing.List['KademliaPeer']] = None
|
||||
) -> typing.List['KademliaPeer']:
|
||||
peers = []
|
||||
async for iteration_peers in self.get_iterative_node_finder(
|
||||
node_id, shortlist=shortlist, max_results=max_results):
|
||||
peers.extend(iteration_peers)
|
||||
async with aclosing(self.get_iterative_node_finder(
|
||||
node_id, shortlist=shortlist, max_results=max_results)) as node_finder:
|
||||
async for iteration_peers in node_finder:
|
||||
peers.extend(iteration_peers)
|
||||
distance = Distance(node_id)
|
||||
peers.sort(key=lambda peer: distance(peer.node_id))
|
||||
return peers[:count]
|
||||
|
|
@ -245,36 +246,36 @@ class Node:
|
|||
|
||||
# prioritize peers who reply to a dht ping first
|
||||
# this minimizes attempting to make tcp connections that won't work later to dead or unreachable peers
|
||||
|
||||
async for results in self.get_iterative_value_finder(bytes.fromhex(blob_hash)):
|
||||
to_put = []
|
||||
for peer in results:
|
||||
if peer.address == self.protocol.external_ip and self.protocol.peer_port == peer.tcp_port:
|
||||
continue
|
||||
is_good = self.protocol.peer_manager.peer_is_good(peer)
|
||||
if is_good:
|
||||
# the peer has replied recently over UDP, it can probably be reached on the TCP port
|
||||
to_put.append(peer)
|
||||
elif is_good is None:
|
||||
if not peer.udp_port:
|
||||
# TODO: use the same port for TCP and UDP
|
||||
# the udp port must be guessed
|
||||
# default to the ports being the same. if the TCP port appears to be <=0.48.0 default,
|
||||
# including on a network with several nodes, then assume the udp port is proportionately
|
||||
# based on a starting port of 4444
|
||||
udp_port_to_try = peer.tcp_port
|
||||
if 3400 > peer.tcp_port > 3332:
|
||||
udp_port_to_try = (peer.tcp_port - 3333) + 4444
|
||||
self.loop.create_task(put_into_result_queue_after_pong(
|
||||
make_kademlia_peer(peer.node_id, peer.address, udp_port_to_try, peer.tcp_port)
|
||||
))
|
||||
async with aclosing(self.get_iterative_value_finder(bytes.fromhex(blob_hash))) as value_finder:
|
||||
async for results in value_finder:
|
||||
to_put = []
|
||||
for peer in results:
|
||||
if peer.address == self.protocol.external_ip and self.protocol.peer_port == peer.tcp_port:
|
||||
continue
|
||||
is_good = self.protocol.peer_manager.peer_is_good(peer)
|
||||
if is_good:
|
||||
# the peer has replied recently over UDP, it can probably be reached on the TCP port
|
||||
to_put.append(peer)
|
||||
elif is_good is None:
|
||||
if not peer.udp_port:
|
||||
# TODO: use the same port for TCP and UDP
|
||||
# the udp port must be guessed
|
||||
# default to the ports being the same. if the TCP port appears to be <=0.48.0 default,
|
||||
# including on a network with several nodes, then assume the udp port is proportionately
|
||||
# based on a starting port of 4444
|
||||
udp_port_to_try = peer.tcp_port
|
||||
if 3400 > peer.tcp_port > 3332:
|
||||
udp_port_to_try = (peer.tcp_port - 3333) + 4444
|
||||
self.loop.create_task(put_into_result_queue_after_pong(
|
||||
make_kademlia_peer(peer.node_id, peer.address, udp_port_to_try, peer.tcp_port)
|
||||
))
|
||||
else:
|
||||
self.loop.create_task(put_into_result_queue_after_pong(peer))
|
||||
else:
|
||||
self.loop.create_task(put_into_result_queue_after_pong(peer))
|
||||
else:
|
||||
# the peer is known to be bad/unreachable, skip trying to connect to it over TCP
|
||||
log.debug("skip bad peer %s:%i for %s", peer.address, peer.tcp_port, blob_hash)
|
||||
if to_put:
|
||||
result_queue.put_nowait(to_put)
|
||||
# the peer is known to be bad/unreachable, skip trying to connect to it over TCP
|
||||
log.debug("skip bad peer %s:%i for %s", peer.address, peer.tcp_port, blob_hash)
|
||||
if to_put:
|
||||
result_queue.put_nowait(to_put)
|
||||
|
||||
def accumulate_peers(self, search_queue: asyncio.Queue,
|
||||
peer_queue: typing.Optional[asyncio.Queue] = None
|
||||
|
|
|
|||
|
|
@ -1,6 +1,7 @@
|
|||
import asyncio
|
||||
from itertools import chain
|
||||
from collections import defaultdict, OrderedDict
|
||||
from collections.abc import AsyncIterator
|
||||
import typing
|
||||
import logging
|
||||
from typing import TYPE_CHECKING
|
||||
|
|
@ -71,7 +72,7 @@ def get_shortlist(routing_table: 'TreeRoutingTable', key: bytes,
|
|||
return shortlist or routing_table.find_close_peers(key)
|
||||
|
||||
|
||||
class IterativeFinder:
|
||||
class IterativeFinder(AsyncIterator):
|
||||
def __init__(self, loop: asyncio.AbstractEventLoop, peer_manager: 'PeerManager',
|
||||
routing_table: 'TreeRoutingTable', protocol: 'KademliaProtocol', key: bytes,
|
||||
max_results: typing.Optional[int] = constants.K,
|
||||
|
|
@ -151,7 +152,7 @@ class IterativeFinder:
|
|||
log.warning("misbehaving peer %s:%i returned peer with reserved ip %s:%i", peer.address,
|
||||
peer.udp_port, address, udp_port)
|
||||
self.check_result_ready(response)
|
||||
self._log_state()
|
||||
self._log_state(reason="check result")
|
||||
|
||||
def _reset_closest(self, peer):
|
||||
if peer in self.active:
|
||||
|
|
@ -163,12 +164,17 @@ class IterativeFinder:
|
|||
except asyncio.TimeoutError:
|
||||
self._reset_closest(peer)
|
||||
return
|
||||
except asyncio.CancelledError:
|
||||
log.debug("%s[%x] cancelled probe",
|
||||
type(self).__name__, id(self))
|
||||
raise
|
||||
except ValueError as err:
|
||||
log.warning(str(err))
|
||||
self._reset_closest(peer)
|
||||
return
|
||||
except TransportNotConnected:
|
||||
return self.aclose()
|
||||
await self._aclose(reason="not connected")
|
||||
return
|
||||
except RemoteException:
|
||||
self._reset_closest(peer)
|
||||
return
|
||||
|
|
@ -182,7 +188,9 @@ class IterativeFinder:
|
|||
added = 0
|
||||
for index, peer in enumerate(self.active.keys()):
|
||||
if index == 0:
|
||||
log.debug("closest to probe: %s", peer.node_id.hex()[:8])
|
||||
log.debug("%s[%x] closest to probe: %s",
|
||||
type(self).__name__, id(self),
|
||||
peer.node_id.hex()[:8])
|
||||
if peer in self.contacted:
|
||||
continue
|
||||
if len(self.running_probes) >= constants.ALPHA:
|
||||
|
|
@ -198,9 +206,13 @@ class IterativeFinder:
|
|||
continue
|
||||
self._schedule_probe(peer)
|
||||
added += 1
|
||||
log.debug("running %d probes for key %s", len(self.running_probes), self.key.hex()[:8])
|
||||
log.debug("%s[%x] running %d probes for key %s",
|
||||
type(self).__name__, id(self),
|
||||
len(self.running_probes), self.key.hex()[:8])
|
||||
if not added and not self.running_probes:
|
||||
log.debug("search for %s exhausted", self.key.hex()[:8])
|
||||
log.debug("%s[%x] search for %s exhausted",
|
||||
type(self).__name__, id(self),
|
||||
self.key.hex()[:8])
|
||||
self.search_exhausted()
|
||||
|
||||
def _schedule_probe(self, peer: 'KademliaPeer'):
|
||||
|
|
@ -216,9 +228,11 @@ class IterativeFinder:
|
|||
t.add_done_callback(callback)
|
||||
self.running_probes[peer] = t
|
||||
|
||||
def _log_state(self):
|
||||
log.debug("[%s] check result: %i active nodes %i contacted",
|
||||
self.key.hex()[:8], len(self.active), len(self.contacted))
|
||||
def _log_state(self, reason="?"):
|
||||
log.debug("%s[%x] [%s] %s: %i active nodes %i contacted %i produced %i queued",
|
||||
type(self).__name__, id(self), self.key.hex()[:8],
|
||||
reason, len(self.active), len(self.contacted),
|
||||
self.iteration_count, self.iteration_queue.qsize())
|
||||
|
||||
def __aiter__(self):
|
||||
if self.running:
|
||||
|
|
@ -237,11 +251,18 @@ class IterativeFinder:
|
|||
raise StopAsyncIteration
|
||||
self.iteration_count += 1
|
||||
return result
|
||||
except (asyncio.CancelledError, StopAsyncIteration):
|
||||
self.loop.call_soon(self.aclose)
|
||||
except asyncio.CancelledError:
|
||||
await self._aclose(reason="cancelled")
|
||||
raise
|
||||
except StopAsyncIteration:
|
||||
await self._aclose(reason="no more results")
|
||||
raise
|
||||
|
||||
def aclose(self):
|
||||
async def _aclose(self, reason="?"):
|
||||
log.debug("%s[%x] [%s] shutdown because %s: %i active nodes %i contacted %i produced %i queued",
|
||||
type(self).__name__, id(self), self.key.hex()[:8],
|
||||
reason, len(self.active), len(self.contacted),
|
||||
self.iteration_count, self.iteration_queue.qsize())
|
||||
self.running = False
|
||||
self.iteration_queue.put_nowait(None)
|
||||
for task in chain(self.tasks, self.running_probes.values()):
|
||||
|
|
@ -249,6 +270,11 @@ class IterativeFinder:
|
|||
self.tasks.clear()
|
||||
self.running_probes.clear()
|
||||
|
||||
async def aclose(self):
|
||||
if self.running:
|
||||
await self._aclose(reason="aclose")
|
||||
log.debug("%s[%x] [%s] async close completed",
|
||||
type(self).__name__, id(self), self.key.hex()[:8])
|
||||
|
||||
class IterativeNodeFinder(IterativeFinder):
|
||||
def __init__(self, loop: asyncio.AbstractEventLoop, peer_manager: 'PeerManager',
|
||||
|
|
|
|||
|
|
@ -130,6 +130,16 @@ def get_sd_hash(stream_info):
|
|||
def json_dumps_pretty(obj, **kwargs):
|
||||
return json.dumps(obj, sort_keys=True, indent=2, separators=(',', ': '), **kwargs)
|
||||
|
||||
try:
|
||||
# the standard contextlib.aclosing() is available in 3.10+
|
||||
from contextlib import aclosing # pylint: disable=unused-import
|
||||
except ImportError:
|
||||
@contextlib.asynccontextmanager
|
||||
async def aclosing(thing):
|
||||
try:
|
||||
yield thing
|
||||
finally:
|
||||
await thing.aclose()
|
||||
|
||||
def async_timed_cache(duration: int):
|
||||
def wrapper(func):
|
||||
|
|
|
|||
Loading…
Reference in a new issue