void LibEventServer::stop() {
Lock lock(m_mutex);
if (getStatus() != RunStatus::RUNNING || m_server == nullptr) return;
#define SHUT_FBLISTEN 3
/*
* Modifications to the Linux kernel to support shutting down a listen
* socket for new connections only, but anything which has completed
* the TCP handshake will still be accepted. This allows for un-accepted
* connections to be queued and then wait until all queued requests are
* actively being processed.
*/
if (RuntimeOption::ServerShutdownListenWait > 0 &&
m_accept_sock != -1 && shutdown(m_accept_sock, SHUT_FBLISTEN) == 0) {
int noWorkCount = 0;
for (int i = 0; i < RuntimeOption::ServerShutdownListenWait; i++) {
// Give the acceptor thread time to clean out all requests
Logger::Info(
"LibEventServer stopping port %d: [%d/%d] a/q/e %d/%d/%d",
m_port, i, RuntimeOption::ServerShutdownListenWait,
getActiveWorker(), getQueuedJobs(), getLibEventConnectionCount());
sleep(1);
// If we're not doing anything, break out quickly
noWorkCount += (getQueuedJobs() == 0 && getActiveWorker() == 0);
if (RuntimeOption::ServerShutdownListenNoWork > 0 &&
noWorkCount >= RuntimeOption::ServerShutdownListenNoWork)
break;
if (getLibEventConnectionCount() == 0 &&
getQueuedJobs() == 0 && getActiveWorker() == 0)
break;
}
Logger::Info("LibEventServer stopped port %d: a/q/e %d/%d/%d",
m_port, getActiveWorker(), getQueuedJobs(),
getLibEventConnectionCount());
}
// inform LibEventServer::onRequest() to stop queuing
setStatus(RunStatus::STOPPING);
// stop JobQueue processing
m_dispatcher.stop();
// stop event loop
setStatus(RunStatus::STOPPED);
if (write(m_pipeStop.getIn(), "", 1) < 0) {
// an error occured but we're in shutdown already, so ignore
}
m_dispatcherThread.waitForEnd();
// wait for the timeout thread to stop
m_timeoutThreadData.stop();
m_timeoutThread.waitForEnd();
evhttp_free(m_server);
m_server = nullptr;
}
void ProxygenServer::timeoutExpired() noexcept {
Logger::Info("%p: shutdown timer expired for ProxygenServer port=%d, "
"state=%d, a/q/e %d/%d/%d", this, m_port, (int)m_shutdownState,
getActiveWorker(), getQueuedJobs(),
getLibEventConnectionCount());
// proceed to next shutdown phase
doShutdown();
}
void ProxygenServer::reportShutdownStatus() {
if (m_port != RuntimeOption::ServerPort) return;
if (getStatus() == RunStatus::STOPPED) return;
Logger::FInfo("Shutdown state={}, a/q/e/p {}/{}/{}/{}, RSS={}Mb",
static_cast<int>(m_shutdownState),
getActiveWorker(),
getQueuedJobs(),
getLibEventConnectionCount(),
m_pendingTransports.size(),
Process::GetProcessRSS(getpid()));
m_worker.getEventBase()->runAfterDelay([this]{reportShutdownStatus();}, 500);
}
