Built in server with PHP_CLI_SERVER_WORKERS is broken in php > 8.0.2

Description

~~I don't known if it's problem with chrome 104 (because firefox/vivaldi works) or with php, but is impossible to serve index.html with php 8.0.22 or php 8.1.9 and PHP_CLI_SERVER_WORKERS >2~~

It's impossible to serve this index.html with php >8.0.2 with PHP_CLI_SERVER_WORKERS >2

Everything works with php7.4.30

The following code:

index.html:

<html>
<script src='test.js?1'></script>
<script src='test.js?2'></script>
<script src='test.js?3'></script>
<script src='test.js?4'></script>
<script src='test.js?5'></script>
<script src='test.js?6'></script>
<script src='test.js?7'></script>
<script src='test.js?8'></script>
<script src='test.js?9'></script>
<script src='test.js?10'></script>
<script src='test.js?11'></script>
<script src='test.js?12'></script>
<script src='test.js?13'></script>
<script src='test.js?14'></script>
<script src='test.js?15'></script>
<script src='test.js?16'></script>
</html>

<body>
Finish...
</body>

create file index.html
start php 8.1.9 PHP_CLI_SERVER_WORKERS=2 php8.1 -S localhost:8081
open http://localhost:8081 in Chrome 104.0.5112.101

PHP Version

8.0.22 , 8.1.9

Operating System

Ubuntu 20.04

but is impossible to serve index.html with php 8.0.22 or php 8.1.9 and PHP_CLI_SERVER_WORKERS >2

What happens? Does PHP hang? Does PHP crash? Does PHP serve nonsense?

@cmb69

@cmb69

There is no crash but browser is waiting for finish request.

To finish request i need open new tab with new connection - than previous one is completed but new connection is waiting

without server workers everything works

Strace info:

strace: Process 268011 attached
select(5, [4], [], NULL, {tv_sec=0, tv_usec=545118}) = 0 (Timeout)
select(5, [4], [], NULL, {tv_sec=1, tv_usec=0}) = 0 (Timeout)
select(5, [4], [], NULL, {tv_sec=1, tv_usec=0}) = 0 (Timeout)
select(5, [4], [], NULL, {tv_sec=1, tv_usec=0}) = 0 (Timeout)
select(5, [4], [], NULL, {tv_sec=1, tv_usec=0}) = 0 (Timeout)
select(5, [4], [], NULL, {tv_sec=1, tv_usec=0}) = 0 (Timeout)
select(5, [4], [], NULL, {tv_sec=1, tv_usec=0}) = 0 (Timeout)
select(5, [4], [], NULL, {tv_sec=1, tv_usec=0}) = 0 (Timeout)

I think it's important that Ctrl+C to stop server doesn't work ([php8.1] <defunct>)

@cmb69

@cmb69 I did more tests...

The problem started in 8.0.3, possibly due to fix for #80723.
PHP version 7.4.x and 8.0.0-8.0.2 are ok.

This problem is not related to chrome, it also occurs with firefox

I can confirm that some requests may hang; that does apparently not happen if index.php is explicitly added to the URL.

@cmb69

@cmb69

It doesn't matter if index.php is in the url or not. It depends on the number of simultaneous connections.

This issue does not occur with a single thread PHP server (without PHP_CLI_SERVER_WORKERS)

Check it (the .jpg files don't even have to exist):

index.php:

<html>
<head>
<title>PHP Bug #9400</title>
</head>

<body>
<?php for($i=0;$i<60;$i++) echo "<img src='/test$i.jpg?".time()."$i'>"; ?>
Finish...
</body>
</html>

docker-compose.yml

version: '3.9'
services:
  php:
#    image: php:8.1.9-cli-alpine
    image: php:8.1.9-cli
    volumes:
      - .:/app
    command: ['-S', '0.0.0.0:8080', '-t', '/app']
    ports:
      - "8080:8080"
    environment:
      PHP_CLI_SERVER_WORKERS: 4

docker compose up
Open http://127.0.0.1:8080/

I can confirm this bug.
With php 8.1.9 on ubuntu, when PHP_CLI_SERVER_WORKERS connection may hang forever (no timeout ??) and browser wait for connection to close.

In dev tool network tab, some connections are in a waiting state.

How to reproduce :

composer create-project --prefer-dist cakephp/app:4.* app
cd app
PHP_CLI_SERVER_WORKERS=2 /usr/bin/php8.1 -S localhost:8080 -t webroot webroot/index.php

go to : http://localhost:8080/ in a chromium web browser (brave)
Very long time to load

Without PHP_CLI_SERVER_WORKERS, page load is instant.

Thanks.

/usr/bin/php8.1 --version

PHP 8.1.9 (cli) (built: Aug 15 2022 09:40:11) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.9, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.9, Copyright (c), by Zend Technologies
    with Xdebug v3.1.5, Copyright (c) 2002-2022, by Derick Rethan

/usr/bin/php8.1 -m

[PHP Modules]
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calendar
Core
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curl
date
dom
exif
FFI
fileinfo
filter
ftp
gd
gettext
hash
iconv
intl
json
libxml
mailparse
mbstring
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
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Phar
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Reflection
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SPL
sqlite3
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xdebug
xml
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xsl
Zend OPcache
zip
zlib

[Zend Modules]
Xdebug
Zend OPcache

Used to face it few times with custom docker images, but no xdebug was enabled. Drupal using build-in server for quick-start so not easy to catch

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Skip DualEraExampleTestCase on PHP 8.1

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Built in server with PHP_CLI_SERVER_WORKERS is broken in php > 8.0.2 #9400

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Built in server with PHP_CLI_SERVER_WORKERS is broken in php > 8.0.2 #9400

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cmb69 commented on Aug 22, 2022

erjotek commented on Aug 22, 2022

erjotek commented on Aug 23, 2022

cmb69 commented on Aug 23, 2022

erjotek commented on Aug 23, 2022

Erwane commented on Sep 7, 2022

andypost commented on Sep 30, 2022

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