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Failed to start the session because headers have already been sent by "/var/www/canadian/vendor/symfony/http-foundation/Response.php" at line 382. (500 Internal Server Error)

Symfony Exception

Symfony Docs

ValueError RuntimeException

HTTP 500 Internal Server Error

Failed to start the session because headers have already been sent by "/var/www/canadian/vendor/symfony/http-foundation/Response.php" at line 382.

Exceptions 2

RuntimeException

in /var/www/canadian/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php (line 116)

if (\PHP_SESSION_ACTIVE === session_status()) {
throw new \RuntimeException('Failed to start the session: already started by PHP.');
}
if (filter_var(\ini_get('session.use_cookies'), \FILTER_VALIDATE_BOOL) && headers_sent($file, $line)) {
throw new \RuntimeException(\sprintf('Failed to start the session because headers have already been sent by "%s" at line %d.', $file, $line));
}
$sessionId = $_COOKIE[session_name()] ?? null;
/*
* Explanation of the session ID regular expression: `/^[a-zA-Z0-9,-]{22,250}$/`.

in /var/www/canadian/vendor/symfony/http-foundation/Session/Session.php -> start (line 59)

$this->registerBag($flashes);
}
public function start(): bool
{
return $this->storage->start();
}
public function has(string $name): bool
{
return $this->getAttributeBag()->has($name);

Session->start() in /var/www/canadian/src/EventListener/RequestListener.php (line 239)

public function onKernelRequest(RequestEvent $event): bool
{
//Inizializzo la sessione
if (!$this->currentRequest->getSession()->isStarted()) {
$this->currentRequest->getSession()->start();
$this->currentRequest->getSession()->set('nrProductsInCart', 0);
}
if (!$this->currentRequest->getSession()->has('nrListini')) {
$this->currentRequest->getSession()->set('nrListini', $this->nrListini);

in /var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php -> onKernelRequest (line 115)

$this->priority ??= $dispatcher->getListenerPriority($eventName, $this->listener);
$e = $this->stopwatch->start($this->name, 'event_listener');
try {
($this->optimizedListener ?? $this->listener)($event, $eventName, $dispatcher);
} finally {
if ($e->isStarted()) {
$e->stop();
}
}

in /var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php -> __invoke (line 206)

foreach ($listeners as $listener) {
if ($stoppable && $event->isPropagationStopped()) {
break;
}
$listener($event, $eventName, $this);
}
}
/**
* Sorts the internal list of listeners for the given event by priority.

in /var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php -> callListeners (line 56)

} else {
$listeners = $this->getListeners($eventName);
}
if ($listeners) {
$this->callListeners($listeners, $eventName, $event);
}
return $event;
}

in /var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php -> dispatch (line 126)

try {
$this->beforeDispatch($eventName, $event);
try {
$e = $this->stopwatch->start($eventName, 'section');
try {
$this->dispatcher->dispatch($event, $eventName);
} finally {
if ($e->isStarted()) {
$e->stop();
}
}

in /var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php -> dispatch (line 159)

*/
private function handleRaw(Request $request, int $type = self::MAIN_REQUEST): Response
{
// request
$event = new RequestEvent($this, $request, $type);
$this->dispatcher->dispatch($event, KernelEvents::REQUEST);
if ($event->hasResponse()) {
return $this->filterResponse($event->getResponse(), $request, $type);
}

in /var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php -> handleRaw (line 76)

$request->headers->set('X-Php-Ob-Level', (string) ob_get_level());
$this->requestStack->push($request);
$response = null;
try {
return $response = $this->handleRaw($request, $type);
} catch (\Throwable $e) {
if ($e instanceof \Error && !$this->handleAllThrowables) {
throw $e;
}

in /var/www/canadian/vendor/symfony/http-kernel/EventListener/ErrorListener.php -> handle (line 99)

}
$request = $this->duplicateRequest($throwable, $event->getRequest());
try {
$response = $event->getKernel()->handle($request, HttpKernelInterface::SUB_REQUEST, false);
} catch (\Exception $e) {
$f = FlattenException::createFromThrowable($e);
$this->logException($e, \sprintf('Exception thrown when handling an exception (%s: %s at %s line %s)', $f->getClass(), $f->getMessage(), basename($e->getFile()), $e->getLine()));

in /var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php -> onKernelException (line 115)

$this->priority ??= $dispatcher->getListenerPriority($eventName, $this->listener);
$e = $this->stopwatch->start($this->name, 'event_listener');
try {
($this->optimizedListener ?? $this->listener)($event, $eventName, $dispatcher);
} finally {
if ($e->isStarted()) {
$e->stop();
}
}

in /var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php -> __invoke (line 206)

foreach ($listeners as $listener) {
if ($stoppable && $event->isPropagationStopped()) {
break;
}
$listener($event, $eventName, $this);
}
}
/**
* Sorts the internal list of listeners for the given event by priority.

in /var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php -> callListeners (line 56)

} else {
$listeners = $this->getListeners($eventName);
}
if ($listeners) {
$this->callListeners($listeners, $eventName, $event);
}
return $event;
}

in /var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php -> dispatch (line 126)

try {
$this->beforeDispatch($eventName, $event);
try {
$e = $this->stopwatch->start($eventName, 'section');
try {
$this->dispatcher->dispatch($event, $eventName);
} finally {
if ($e->isStarted()) {
$e->stop();
}
}

in /var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php -> dispatch (line 241)

* Handles a throwable by trying to convert it to a Response.
*/
private function handleThrowable(\Throwable $e, Request $request, int $type): Response
{
$event = new ExceptionEvent($this, $request, $type, $e, isKernelTerminating: $this->terminating);
$this->dispatcher->dispatch($event, KernelEvents::EXCEPTION);
// a listener might have replaced the exception
$e = $event->getThrowable();
if (!$event->hasResponse()) {

in /var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php -> handleThrowable (line 134)

if ($pop = $request !== $this->requestStack->getMainRequest()) {
$this->requestStack->push($request);
}
try {
$response = $this->handleThrowable($exception, $request, self::MAIN_REQUEST);
} finally {
if ($pop) {
$this->requestStack->pop();
}
}

in /var/www/canadian/vendor/symfony/http-kernel/EventListener/DebugHandlersListener.php -> terminateWithException (line 84)

if ($hasRun) {
throw $e;
}
$hasRun = true;
$kernel->terminateWithException($e, $request);
};
}
} elseif ($event instanceof ConsoleEvent && $app = $event->getCommand()->getApplication()) {
$output = $event->getOutput();
if ($output instanceof ConsoleOutputInterface) {

in /var/www/canadian/vendor/symfony/error-handler/ErrorHandler.php :: Symfony\Component\HttpKernel\EventListener\{closure} (line 538)

$this->exceptionHandler = null;
}
try {
if (null !== $exceptionHandler) {
$exceptionHandler($exception);
return;
}
$handlerException ??= $exception;
} catch (\Throwable $handlerException) {

ErrorHandler->handleException()

ValueError

unlink(): Argument #1 ($filename) must not contain any null bytes

in /var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php (line 341)

if ($csvTime >= $minimalProfileTimestamp) {
break;
}
@unlink($this->getFilename($csvToken));
$offset += \strlen($line);
}
fclose($handle);
file_put_contents($file.'.offset', $offset);

in /var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php unlink (line 341)

if ($csvTime >= $minimalProfileTimestamp) {
break;
}
@unlink($this->getFilename($csvToken));
$offset += \strlen($line);
}
fclose($handle);
file_put_contents($file.'.offset', $offset);

in /var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php -> removeExpiredProfiles (line 193)

$profile->getVirtualType() ?? 'request',
], ',', '"', '\\');
fclose($file);
if (1 === mt_rand(1, 10)) {
$this->removeExpiredProfiles();
}
}
return true;
}

in /var/www/canadian/vendor/symfony/http-kernel/Profiler/Profiler.php -> write (line 97)

if ($collector instanceof LateDataCollectorInterface) {
$collector->lateCollect();
}
}
if (!($ret = $this->storage->write($profile)) && null !== $this->logger) {
$this->logger->warning('Unable to store the profiler information.', ['configured_storage' => $this->storage::class]);
}
return $ret;
}

in /var/www/canadian/vendor/symfony/http-kernel/EventListener/ProfilerListener.php -> saveProfile (line 129)

}
}
// save profiles
foreach ($this->profiles as $request) {
$this->profiler->saveProfile($this->profiles[$request]);
}
$this->profiles = new \SplObjectStorage();
$this->parents = new \SplObjectStorage();
}

in /var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php -> onKernelTerminate (line 115)

$this->priority ??= $dispatcher->getListenerPriority($eventName, $this->listener);
$e = $this->stopwatch->start($this->name, 'event_listener');
try {
($this->optimizedListener ?? $this->listener)($event, $eventName, $dispatcher);
} finally {
if ($e->isStarted()) {
$e->stop();
}
}

in /var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php -> __invoke (line 206)

foreach ($listeners as $listener) {
if ($stoppable && $event->isPropagationStopped()) {
break;
}
$listener($event, $eventName, $this);
}
}
/**
* Sorts the internal list of listeners for the given event by priority.

in /var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php -> callListeners (line 56)

} else {
$listeners = $this->getListeners($eventName);
}
if ($listeners) {
$this->callListeners($listeners, $eventName, $event);
}
return $event;
}

in /var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php -> dispatch (line 126)

try {
$this->beforeDispatch($eventName, $event);
try {
$e = $this->stopwatch->start($eventName, 'section');
try {
$this->dispatcher->dispatch($event, $eventName);
} finally {
if ($e->isStarted()) {
$e->stop();
}
}

in /var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php -> dispatch (line 114)

public function terminate(Request $request, Response $response): void
{
try {
$this->terminating = true;
$this->dispatcher->dispatch(new TerminateEvent($this, $request, $response), KernelEvents::TERMINATE);
} finally {
$this->terminating = false;
}
}

in /var/www/canadian/vendor/symfony/http-kernel/Kernel.php -> terminate (line 145)

if (false === $this->booted) {
return;
}
if ($this->getHttpKernel() instanceof TerminableInterface) {
$this->getHttpKernel()->terminate($request, $response);
}
}
public function shutdown(): void
{

in /var/www/canadian/vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php -> terminate (line 53)

} else {
$response->send();
}
if ($this->kernel instanceof TerminableInterface) {
$this->kernel->terminate($this->request, $response);
}
return 0;
}
}

in /var/www/canadian/vendor/autoload_runtime.php -> run (line 29)

$app = $app(...$args);
exit(
$runtime
->getRunner($app)
->run()
);

require_once('/var/www/canadian/vendor/autoload_runtime.php') in /var/www/canadian/public/index.php (line 5)

<?php
use App\Kernel;
require_once dirname(__DIR__).'/vendor/autoload_runtime.php';
return function (array $context) {
return new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);
};

Stack Traces 2

[2/2] RuntimeException
RuntimeException: Failed to start the session because headers have already been sent by "/var/www/canadian/vendor/symfony/http-foundation/Response.php" at line 382. at /var/www/canadian/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:116 at Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() (/var/www/canadian/vendor/symfony/http-foundation/Session/Session.php:59) at Symfony\Component\HttpFoundation\Session\Session->start() (/var/www/canadian/src/EventListener/RequestListener.php:239) at App\EventListener\RequestListener->onKernelRequest() (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php:115) at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke() (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:206) at Symfony\Component\EventDispatcher\EventDispatcher->callListeners() (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:56) at Symfony\Component\EventDispatcher\EventDispatcher->dispatch() (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:126) at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch() (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:159) at Symfony\Component\HttpKernel\HttpKernel->handleRaw() (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:76) at Symfony\Component\HttpKernel\HttpKernel->handle() (/var/www/canadian/vendor/symfony/http-kernel/EventListener/ErrorListener.php:99) at Symfony\Component\HttpKernel\EventListener\ErrorListener->onKernelException() (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php:115) at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke() (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:206) at Symfony\Component\EventDispatcher\EventDispatcher->callListeners() (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:56) at Symfony\Component\EventDispatcher\EventDispatcher->dispatch() (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:126) at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch() (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:241) at Symfony\Component\HttpKernel\HttpKernel->handleThrowable() (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:134) at Symfony\Component\HttpKernel\HttpKernel->terminateWithException() (/var/www/canadian/vendor/symfony/http-kernel/EventListener/DebugHandlersListener.php:84) at Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::Symfony\Component\HttpKernel\EventListener\{closure}() (/var/www/canadian/vendor/symfony/error-handler/ErrorHandler.php:538) at Symfony\Component\ErrorHandler\ErrorHandler->handleException()

[2/2] RuntimeException

RuntimeException:
Failed to start the session because headers have already been sent by "/var/www/canadian/vendor/symfony/http-foundation/Response.php" at line 382.

  at /var/www/canadian/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:116
  at Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start()
     (/var/www/canadian/vendor/symfony/http-foundation/Session/Session.php:59)
  at Symfony\Component\HttpFoundation\Session\Session->start()
     (/var/www/canadian/src/EventListener/RequestListener.php:239)
  at App\EventListener\RequestListener->onKernelRequest()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php:115)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:206)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:56)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:126)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:159)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw()
     (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:76)
  at Symfony\Component\HttpKernel\HttpKernel->handle()
     (/var/www/canadian/vendor/symfony/http-kernel/EventListener/ErrorListener.php:99)
  at Symfony\Component\HttpKernel\EventListener\ErrorListener->onKernelException()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php:115)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:206)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:56)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:126)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:241)
  at Symfony\Component\HttpKernel\HttpKernel->handleThrowable()
     (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:134)
  at Symfony\Component\HttpKernel\HttpKernel->terminateWithException()
     (/var/www/canadian/vendor/symfony/http-kernel/EventListener/DebugHandlersListener.php:84)
  at Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::Symfony\Component\HttpKernel\EventListener\{closure}()
     (/var/www/canadian/vendor/symfony/error-handler/ErrorHandler.php:538)
  at Symfony\Component\ErrorHandler\ErrorHandler->handleException()

[1/2] ValueError
ValueError: unlink(): Argument #1 ($filename) must not contain any null bytes at /var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php:341 at unlink() (/var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php:341) at Symfony\Component\HttpKernel\Profiler\FileProfilerStorage->removeExpiredProfiles() (/var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php:193) at Symfony\Component\HttpKernel\Profiler\FileProfilerStorage->write() (/var/www/canadian/vendor/symfony/http-kernel/Profiler/Profiler.php:97) at Symfony\Component\HttpKernel\Profiler\Profiler->saveProfile() (/var/www/canadian/vendor/symfony/http-kernel/EventListener/ProfilerListener.php:129) at Symfony\Component\HttpKernel\EventListener\ProfilerListener->onKernelTerminate() (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php:115) at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke() (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:206) at Symfony\Component\EventDispatcher\EventDispatcher->callListeners() (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:56) at Symfony\Component\EventDispatcher\EventDispatcher->dispatch() (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:126) at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch() (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:114) at Symfony\Component\HttpKernel\HttpKernel->terminate() (/var/www/canadian/vendor/symfony/http-kernel/Kernel.php:145) at Symfony\Component\HttpKernel\Kernel->terminate() (/var/www/canadian/vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php:53) at Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run() (/var/www/canadian/vendor/autoload_runtime.php:29) at require_once('/var/www/canadian/vendor/autoload_runtime.php') (/var/www/canadian/public/index.php:5)

[1/2] ValueError

ValueError:
unlink(): Argument #1 ($filename) must not contain any null bytes

  at /var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php:341
  at unlink()
     (/var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php:341)
  at Symfony\Component\HttpKernel\Profiler\FileProfilerStorage->removeExpiredProfiles()
     (/var/www/canadian/vendor/symfony/http-kernel/Profiler/FileProfilerStorage.php:193)
  at Symfony\Component\HttpKernel\Profiler\FileProfilerStorage->write()
     (/var/www/canadian/vendor/symfony/http-kernel/Profiler/Profiler.php:97)
  at Symfony\Component\HttpKernel\Profiler\Profiler->saveProfile()
     (/var/www/canadian/vendor/symfony/http-kernel/EventListener/ProfilerListener.php:129)
  at Symfony\Component\HttpKernel\EventListener\ProfilerListener->onKernelTerminate()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/WrappedListener.php:115)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:206)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
     (/var/www/canadian/vendor/symfony/event-dispatcher/EventDispatcher.php:56)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:126)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch()
     (/var/www/canadian/vendor/symfony/http-kernel/HttpKernel.php:114)
  at Symfony\Component\HttpKernel\HttpKernel->terminate()
     (/var/www/canadian/vendor/symfony/http-kernel/Kernel.php:145)
  at Symfony\Component\HttpKernel\Kernel->terminate()
     (/var/www/canadian/vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php:53)
  at Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run()
     (/var/www/canadian/vendor/autoload_runtime.php:29)
  at require_once('/var/www/canadian/vendor/autoload_runtime.php')
     (/var/www/canadian/public/index.php:5)