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fix client connector wait queue

This commit is contained in:
Nikolay Kim 2018-07-18 01:23:56 +06:00
parent 373f2e5028
commit 85672d1379
2 changed files with 176 additions and 259 deletions

View file

@ -46,8 +46,6 @@ pub struct ClientConnectorStats {
pub errors: usize,
/// Number of connection timeouts
pub timeouts: usize,
/// Number of released connections
pub released: usize,
}
#[derive(Debug)]
@ -413,14 +411,14 @@ impl ClientConnector {
}
if self.limit_per_host > 0 {
if let Some(per_host) = self.acquired_per_host.get(key) {
if self.limit_per_host >= *per_host {
if *per_host >= self.limit_per_host {
return Acquire::NotAvailable;
}
}
}
} else if self.limit_per_host > 0 {
if let Some(per_host) = self.acquired_per_host.get(key) {
if self.limit_per_host >= *per_host {
if *per_host >= self.limit_per_host {
return Acquire::NotAvailable;
}
}
@ -469,7 +467,9 @@ impl ClientConnector {
}
fn release_key(&mut self, key: &Key) {
self.acquired -= 1;
if self.acquired > 0 {
self.acquired -= 1;
}
let per_host = if let Some(per_host) = self.acquired_per_host.get(key) {
*per_host
} else {
@ -514,23 +514,23 @@ impl ClientConnector {
let mut next = None;
for waiters in self.waiters.as_mut().unwrap().values_mut() {
let mut idx = 0;
while idx < waiters.len() {
if waiters[idx].wait <= now {
let mut new_waiters = VecDeque::new();
while let Some(waiter) = waiters.pop_front() {
if waiter.wait <= now {
self.stats.timeouts += 1;
let waiter = waiters.swap_remove_back(idx).unwrap();
let _ = waiter.tx.send(Err(ClientConnectorError::Timeout));
} else {
if let Some(n) = next {
if waiters[idx].wait < n {
next = Some(waiters[idx].wait);
if waiter.wait < n {
next = Some(waiter.wait);
}
} else {
next = Some(waiters[idx].wait);
next = Some(waiter.wait);
}
idx += 1;
new_waiters.push_back(waiter);
}
}
*waiters = new_waiters;
}
if next.is_some() {
@ -573,20 +573,56 @@ impl ClientConnector {
rx
}
fn connect_waiter(&mut self, key: Key, waiter: Waiter, ctx: &mut Context<Self>) {
let conn = AcquiredConn(key, Some(self.acq_tx.clone()));
fn check_availibility(&mut self, ctx: &mut Context<ClientConnector>) {
// check waiters
let mut act_waiters = self.waiters.take().unwrap();
for (key, ref mut waiters) in &mut act_waiters {
while let Some(waiter) = waiters.pop_front() {
if waiter.tx.is_canceled() {
continue;
}
match self.acquire(key) {
Acquire::Acquired(mut conn) => {
// use existing connection
self.stats.reused += 1;
conn.pool =
Some(AcquiredConn(key.clone(), Some(self.acq_tx.clone())));
let _ = waiter.tx.send(Ok(conn));
}
Acquire::NotAvailable => {
waiters.push_front(waiter);
break;
}
Acquire::Available => {
// create new connection
self.connect_waiter(key.clone(), waiter, ctx);
}
}
}
}
self.waiters = Some(act_waiters);
}
fn connect_waiter(&mut self, key: Key, waiter: Waiter, ctx: &mut Context<Self>) {
let conn = AcquiredConn(key.clone(), Some(self.acq_tx.clone()));
let key2 = key.clone();
fut::WrapFuture::<ClientConnector>::actfuture(
self.resolver.as_ref().unwrap().send(
ResolveConnect::host_and_port(&conn.0.host, conn.0.port)
.timeout(waiter.conn_timeout),
),
).map_err(|_, _, _| ())
).map_err(move |_, act, _| {
act.release_key(&key2);
()
})
.and_then(move |res, act, _| {
#[cfg(feature = "alpn")]
match res {
Err(err) => {
act.stats.errors += 1;
let _ = waiter.tx.send(Err(err.into()));
fut::Either::B(fut::err(()))
}
@ -596,7 +632,8 @@ impl ClientConnector {
fut::Either::A(
act.connector
.connect_async(&key.host, stream)
.then(move |res| {
.into_actor(act)
.then(move |res, act, _| {
match res {
Err(e) => {
let _ = waiter.tx.send(Err(
@ -612,9 +649,8 @@ impl ClientConnector {
)));
}
}
Ok(())
})
.into_actor(act),
fut::ok(())
}),
)
} else {
let _ = waiter.tx.send(Ok(Connection::new(
@ -630,7 +666,6 @@ impl ClientConnector {
#[cfg(all(feature = "tls", not(feature = "alpn")))]
match res {
Err(err) => {
act.stats.errors += 1;
let _ = waiter.tx.send(Err(err.into()));
fut::Either::B(fut::err(()))
}
@ -640,7 +675,8 @@ impl ClientConnector {
fut::Either::A(
act.connector
.connect_async(&conn.0.host, stream)
.then(|res| {
.into_actor(act)
.then(move |res, _, _| {
match res {
Err(e) => {
let _ = waiter.tx.send(Err(
@ -656,9 +692,8 @@ impl ClientConnector {
)));
}
}
Ok(())
})
.into_actor(act),
fut::ok(())
}),
)
} else {
let _ = waiter.tx.send(Ok(Connection::new(
@ -674,7 +709,6 @@ impl ClientConnector {
#[cfg(not(any(feature = "alpn", feature = "tls")))]
match res {
Err(err) => {
act.stats.errors += 1;
let _ = waiter.tx.send(Err(err.into()));
fut::err(())
}
@ -725,7 +759,7 @@ impl Handler<Resume> for ClientConnector {
impl Handler<Connect> for ClientConnector {
type Result = ActorResponse<ClientConnector, Connection, ClientConnectorError>;
fn handle(&mut self, msg: Connect, _: &mut Self::Context) -> Self::Result {
fn handle(&mut self, msg: Connect, ctx: &mut Self::Context) -> Self::Result {
let uri = &msg.uri;
let wait_timeout = msg.wait_timeout;
let conn_timeout = msg.conn_timeout;
@ -761,239 +795,142 @@ impl Handler<Connect> for ClientConnector {
// check pause state
if self.paused.is_paused() {
let rx = self.wait_for(key, wait_timeout, conn_timeout);
let rx = self.wait_for(key.clone(), wait_timeout, conn_timeout);
self.stats.waits += 1;
return ActorResponse::async(
rx.map_err(|_| ClientConnectorError::Disconnected)
.into_actor(self)
.and_then(|res, _, _| match res {
.and_then(move |res, act, ctx| match res {
Ok(conn) => fut::ok(conn),
Err(err) => fut::err(err),
Err(err) => {
match err {
ClientConnectorError::Timeout => (),
_ => {
act.release_key(&key);
}
}
act.stats.errors += 1;
act.check_availibility(ctx);
fut::err(err)
}
}),
);
}
// do not re-use websockets connection
if !proto.is_http() {
let (tx, rx) = oneshot::channel();
let wait = Instant::now() + wait_timeout;
let waiter = Waiter {
tx,
wait,
conn_timeout,
};
self.connect_waiter(key.clone(), waiter, ctx);
return ActorResponse::async(
rx.map_err(|_| ClientConnectorError::Disconnected)
.into_actor(self)
.and_then(move |res, act, ctx| match res {
Ok(conn) => fut::ok(conn),
Err(err) => {
act.stats.errors += 1;
act.release_key(&key);
act.check_availibility(ctx);
fut::err(err)
}
}),
);
}
// acquire connection
let pool = if proto.is_http() {
match self.acquire(&key) {
Acquire::Acquired(mut conn) => {
// use existing connection
conn.pool = Some(AcquiredConn(key, Some(self.acq_tx.clone())));
self.stats.reused += 1;
return ActorResponse::async(fut::ok(conn));
}
Acquire::NotAvailable => {
// connection is not available, wait
let rx = self.wait_for(key, wait_timeout, conn_timeout);
self.stats.waits += 1;
return ActorResponse::async(
rx.map_err(|_| ClientConnectorError::Disconnected)
.into_actor(self)
.and_then(|res, _, _| match res {
Ok(conn) => fut::ok(conn),
Err(err) => fut::err(err),
}),
);
}
Acquire::Available => Some(self.acq_tx.clone()),
match self.acquire(&key) {
Acquire::Acquired(mut conn) => {
// use existing connection
conn.pool = Some(AcquiredConn(key, Some(self.acq_tx.clone())));
self.stats.reused += 1;
ActorResponse::async(fut::ok(conn))
}
} else {
None
};
let conn = AcquiredConn(key, pool);
Acquire::NotAvailable => {
// connection is not available, wait
let rx = self.wait_for(key.clone(), wait_timeout, conn_timeout);
self.stats.waits += 1;
{
ActorResponse::async(
self.resolver
.as_ref()
.unwrap()
.send(
ResolveConnect::host_and_port(&conn.0.host, port)
.timeout(conn_timeout),
)
.into_actor(self)
.map_err(|_, _, _| ClientConnectorError::Disconnected)
.and_then(move |res, act, _| {
#[cfg(feature = "alpn")]
match res {
ActorResponse::async(
rx.map_err(|_| ClientConnectorError::Disconnected)
.into_actor(self)
.and_then(move |res, act, ctx| match res {
Ok(conn) => fut::ok(conn),
Err(err) => {
act.stats.opened += 1;
fut::Either::B(fut::err(err.into()))
}
Ok(stream) => {
act.stats.opened += 1;
if proto.is_secure() {
fut::Either::A(
act.connector
.connect_async(&conn.0.host, stream)
.map_err(ClientConnectorError::SslError)
.map(|stream| {
Connection::new(
conn.0.clone(),
Some(conn),
Box::new(stream),
)
})
.into_actor(act),
)
} else {
fut::Either::B(fut::ok(Connection::new(
conn.0.clone(),
Some(conn),
Box::new(stream),
)))
match err {
ClientConnectorError::Timeout => (),
_ => {
act.release_key(&key);
}
}
act.stats.errors += 1;
act.check_availibility(ctx);
fut::err(err)
}
}
}),
)
}
Acquire::Available => {
let (tx, rx) = oneshot::channel();
let wait = Instant::now() + wait_timeout;
let waiter = Waiter {
tx,
wait,
conn_timeout,
};
self.connect_waiter(key.clone(), waiter, ctx);
#[cfg(all(feature = "tls", not(feature = "alpn")))]
match res {
ActorResponse::async(
rx.map_err(|_| ClientConnectorError::Disconnected)
.into_actor(self)
.and_then(move |res, act, ctx| match res {
Ok(conn) => fut::ok(conn),
Err(err) => {
act.stats.opened += 1;
fut::Either::B(fut::err(err.into()))
act.stats.errors += 1;
act.release_key(&key);
act.check_availibility(ctx);
fut::err(err)
}
Ok(stream) => {
act.stats.opened += 1;
if proto.is_secure() {
fut::Either::A(
act.connector
.connect_async(&conn.0.host, stream)
.map_err(ClientConnectorError::SslError)
.map(|stream| {
Connection::new(
conn.0.clone(),
Some(conn),
Box::new(stream),
)
})
.into_actor(act),
)
} else {
fut::Either::B(fut::ok(Connection::new(
conn.0.clone(),
Some(conn),
Box::new(stream),
)))
}
}
}
#[cfg(not(any(feature = "alpn", feature = "tls")))]
match res {
Err(err) => {
act.stats.opened += 1;
fut::err(err.into())
}
Ok(stream) => {
act.stats.opened += 1;
if proto.is_secure() {
fut::err(ClientConnectorError::SslIsNotSupported)
} else {
fut::ok(Connection::new(
conn.0.clone(),
Some(conn),
Box::new(stream),
))
}
}
}
}),
)
}),
)
}
}
}
}
impl StreamHandler<AcquiredConnOperation, ()> for ClientConnector {
fn handle(&mut self, msg: AcquiredConnOperation, ctx: &mut Context<Self>) {
let now = Instant::now();
self.stats.released += 1;
// check if we have queued up waiters
let waiter = {
let key = match msg {
AcquiredConnOperation::Close(ref conn) => &conn.key,
AcquiredConnOperation::Release(ref conn) => &conn.key,
AcquiredConnOperation::ReleaseKey(ref key) => key,
};
if let Some(ref mut waiters) = self.waiters.as_mut().unwrap().get_mut(key) {
loop {
if let Some(waiter) = waiters.pop_front() {
if waiter.tx.is_canceled() {
continue;
}
break Some(waiter);
} else {
break None;
}
}
} else {
None
}
};
match msg {
AcquiredConnOperation::Close(conn) => {
if let Some(waiter) = waiter {
// create new connection
self.connect_waiter(conn.key.clone(), waiter, ctx);
} else {
self.release_key(&conn.key);
}
self.release_key(&conn.key);
self.to_close.push(conn);
self.stats.closed += 1;
}
AcquiredConnOperation::Release(mut conn) => {
let alive = (Instant::now() - conn.ts) < self.conn_lifetime;
if let Some(waiter) = waiter {
// check connection lifetime and the return to available pool
if alive {
// use existing connection
self.stats.reused += 1;
conn.pool = Some(AcquiredConn(
conn.key.clone(),
Some(self.acq_tx.clone()),
));
let _ = waiter.tx.send(Ok(conn));
} else {
// create new connection
self.connect_waiter(conn.key.clone(), waiter, ctx);
}
AcquiredConnOperation::Release(conn) => {
self.release_key(&conn.key);
if (Instant::now() - conn.ts) < self.conn_lifetime {
self.available
.entry(conn.key.clone())
.or_insert_with(VecDeque::new)
.push_back(Conn(Instant::now(), conn));
} else {
self.release_key(&conn.key);
if alive {
self.available
.entry(conn.key.clone())
.or_insert_with(VecDeque::new)
.push_back(Conn(Instant::now(), conn));
}
self.to_close.push(conn);
self.stats.closed += 1;
}
}
AcquiredConnOperation::ReleaseKey(key) => {
if let Some(waiter) = waiter {
// create new connection
self.connect_waiter(key, waiter, ctx);
} else {
self.release_key(&key);
}
// closed
self.stats.closed += 1;
self.release_key(&key);
}
}
// check keep-alive
for conns in self.available.values_mut() {
while !conns.is_empty() {
if (now > conns[0].0) && (now - conns[0].0) > self.conn_keep_alive
|| (now - conns[0].1.ts) > self.conn_lifetime
{
let conn = conns.pop_front().unwrap().1;
self.to_close.push(conn);
self.stats.closed += 1;
} else {
break;
}
}
}
self.check_availibility(ctx);
}
}
@ -1018,35 +955,8 @@ impl fut::ActorFuture for Maintenance {
act.collect_waiters();
// check waiters
let mut act_waiters = act.waiters.take().unwrap();
act.check_availibility(ctx);
for (key, ref mut waiters) in &mut act_waiters {
while let Some(waiter) = waiters.pop_front() {
if waiter.tx.is_canceled() {
continue;
}
match act.acquire(key) {
Acquire::Acquired(mut conn) => {
// use existing connection
act.stats.reused += 1;
conn.pool =
Some(AcquiredConn(key.clone(), Some(act.acq_tx.clone())));
let _ = waiter.tx.send(Ok(conn));
}
Acquire::NotAvailable => {
waiters.push_front(waiter);
break;
}
Acquire::Available => {
// create new connection
act.connect_waiter(key.clone(), waiter, ctx);
}
}
}
}
act.waiters = Some(act_waiters);
Ok(Async::NotReady)
}
}
@ -1181,14 +1091,14 @@ impl Connection {
Connection::new(Key::empty(), None, Box::new(io))
}
/// Close connection pool
/// Close connection
pub fn close(mut self) {
if let Some(mut pool) = self.pool.take() {
pool.close(self)
}
}
/// Release this connection from the connection pool
/// Release this connection to the connection pool
pub fn release(mut self) {
if let Some(mut pool) = self.pool.take() {
pool.release(self)

View file

@ -17,7 +17,7 @@ use context::{ActorHttpContext, Frame};
use error::Error;
use error::PayloadError;
use header::ContentEncoding;
use http::Method;
use http::{Method, Uri};
use httpmessage::HttpMessage;
use server::input::PayloadStream;
use server::WriterState;
@ -203,7 +203,8 @@ impl Future for SendRequest {
should_decompress: self.req.response_decompress(),
write_state: RunningState::Running,
timeout: Some(Delay::new(Instant::now() + timeout)),
close: self.req.method() == &Method::HEAD,
meth: self.req.method().clone(),
path: self.req.uri().clone(),
});
self.state = State::Send(pl);
}
@ -249,7 +250,8 @@ pub struct Pipeline {
should_decompress: bool,
write_state: RunningState,
timeout: Option<Delay>,
close: bool,
meth: Method,
path: Uri,
}
enum IoBody {
@ -283,7 +285,7 @@ impl RunningState {
impl Pipeline {
fn release_conn(&mut self) {
if let Some(conn) = self.conn.take() {
if self.close {
if self.meth == Method::HEAD {
conn.close()
} else {
conn.release()
@ -529,6 +531,11 @@ impl Pipeline {
impl Drop for Pipeline {
fn drop(&mut self) {
if let Some(conn) = self.conn.take() {
debug!(
"Client http transaction is not completed, dropping connection: {:?} {:?}",
self.meth,
self.path,
);
conn.close()
}
}