~Server() {
TRACE_POINT();
this_thread::disable_syscall_interruption dsi;
this_thread::disable_interruption di;
P_DEBUG("Shutting down helper agent...");
prestarterThread->interrupt_and_join();
if (messageServerThread != NULL) {
messageServerThread->interrupt_and_join();
}
messageServer.reset();
P_DEBUG("Destroying application pool...");
pool->destroy();
uninstallDiagnosticsDumper();
pool.reset();
poolLoop.stop();
requestLoop.stop();
requestHandler.reset();
if (!options.requestSocketLink.empty()) {
syscalls::unlink(options.requestSocketLink.c_str());
}
P_TRACE(2, "All threads have been shut down.");
}
void mainLoop() {
TRACE_POINT();
boost::function<void ()> func;
func = boost::bind(&MessageServer::mainLoop, messageServer.get());
messageServerThread = ptr(new oxt::thread(
boost::bind(runAndPrintExceptions, func, true),
"MessageServer thread", MESSAGE_SERVER_THREAD_STACK_SIZE
));
poolLoop.start("Pool event loop", 0);
requestLoop.start("Request event loop", 0);
/* Wait until the watchdog closes the feedback fd (meaning it
* was killed) or until we receive an exit message.
*/
this_thread::disable_syscall_interruption dsi;
fd_set fds;
int largestFd;
FD_ZERO(&fds);
FD_SET(feedbackFd, &fds);
FD_SET(exitEvent.fd(), &fds);
largestFd = (feedbackFd > exitEvent.fd()) ? (int) feedbackFd : exitEvent.fd();
UPDATE_TRACE_POINT();
installDiagnosticsDumper();
if (syscalls::select(largestFd + 1, &fds, NULL, NULL, NULL) == -1) {
int e = errno;
uninstallDiagnosticsDumper();
throw SystemException("select() failed", e);
}
if (FD_ISSET(feedbackFd, &fds)) {
/* If the watchdog has been killed then we'll kill all descendant
* processes and exit. There's no point in keeping this helper
* server running because we can't detect when the web server exits,
* and because this helper agent doesn't own the server instance
* directory. As soon as passenger-status is run, the server
* instance directory will be cleaned up, making this helper agent
* inaccessible.
*/
P_DEBUG("Watchdog seems to be killed; forcing shutdown of all subprocesses");
syscalls::killpg(getpgrp(), SIGKILL);
_exit(2); // In case killpg() fails.
} else {
/* We received an exit command. We want to exit 5 seconds after
* all clients have disconnected have become inactive.
*/
P_DEBUG("Received command to exit gracefully. "
"Waiting until 5 seconds after all clients have disconnected...");
while (requestHandler->inactivityTime() < 5000) {
syscalls::usleep(250000);
}
P_DEBUG("It's now 5 seconds after all clients have disconnected. "
"Proceeding with graceful exit.");
}
}
~Server() {
TRACE_POINT();
this_thread::disable_syscall_interruption dsi;
this_thread::disable_interruption di;
P_DEBUG("Shutting down helper agent...");
prestarterThread->interrupt_and_join();
if (messageServerThread != NULL) {
messageServerThread->interrupt_and_join();
}
messageServer.reset();
P_DEBUG("Destroying application pool...");
pool->destroy();
uninstallDiagnosticsDumper();
pool.reset();
poolLoop.stop();
requestLoop.stop();
requestHandler.reset();
if (!options.requestSocketLink.empty()) {
char path[PATH_MAX + 1];
ssize_t ret;
bool shouldUnlink;
ret = readlink(options.requestSocketLink.c_str(), path, PATH_MAX);
if (ret != -1) {
path[ret] = '\0';
// Only unlink if a new Flying Passenger instance hasn't overwritten the
// symlink.
// https://code.google.com/p/phusion-passenger/issues/detail?id=939
shouldUnlink = getRequestSocketFilename() == path;
} else {
shouldUnlink = true;
}
if (shouldUnlink) {
syscalls::unlink(options.requestSocketLink.c_str());
}
}
P_TRACE(2, "All threads have been shut down.");
}
~Server() {
TRACE_POINT();
this_thread::disable_syscall_interruption dsi;
this_thread::disable_interruption di;
P_DEBUG("Shutting down helper agent...");
prestarterThread->interrupt_and_join();
if (messageServerThread != NULL) {
messageServerThread->interrupt_and_join();
}
messageServer.reset();
pool->destroy();
pool.reset();
requestHandler.reset();
poolLoop.stop();
requestLoop.stop();
P_TRACE(2, "All threads have been shut down.");
}