Using package_length_func about swoole-src

[NathanFreeman]

It is possible that there is an issue with the data being sent, indicating an error in receiving a packet of length 50, and the custom function is unable to handle it, resulting in a return of -1 and closing the connection. Check if an exception is being thrown.

[karevan]

I checked this and the exception does not occur, when there are many packages incoming that are not valid and we return -1, after some time it causes the workers to restart.

Like this:

[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39558]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 254 bytes of malformed data from the client[172.19.0.2:39560]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39562]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39564]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39566]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39568]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 254 bytes of malformed data from the client[172.19.0.2:39570]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 254 bytes of malformed data from the client[172.19.0.2:39572]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39574]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 254 bytes of malformed data from the client[172.19.0.2:39576]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39578]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39580]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 254 bytes of malformed data from the client[172.19.0.2:39582]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 254 bytes of malformed data from the client[172.19.0.2:39584]
[2024-04-23 11:58:10 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39586]
[2024-04-23 11:58:11 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39592]
[2024-04-23 11:58:11 #18985.3]	WARNING	Protocol::recv_with_length_protocol() (ERRNO 1204): received 50 bytes of malformed data from the client[172.19.0.2:39594]

WORKER: 2 IS EXIT
WORKER: 0 IS EXIT
WORKER: 4 IS EXIT
WORKER: 2 IS EXIT
WORKER: 0 IS EXIT
WORKER: 4 IS EXIT
WORKER: 6 IS EXIT
WORKER: 6 IS EXIT
WORKER: 8 IS EXIT
WORKER: 1 IS EXIT
WORKER: 8 IS EXIT
WORKER: 1 IS EXIT
WORKER: 7 IS EXIT
WORKER: 7 IS EXIT
WORKER: 5 IS EXIT
WORKER: 5 IS EXIT
WORKER: 3 IS EXIT
WORKER: 3 IS EXIT
WORKER: 9 IS EXIT
WORKER: 9 IS EXIT
WORKER: 0 IS EXIT
WORKER: 1 IS EXIT
WORKER: 2 IS EXIT

Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)

Note: I run this server with 10 workers

[NathanFreeman]

Do you have the configuration for "max_request" set?

[karevan]

No, I just used these configs:

$server->set([
 // Server
 'worker_num'               => 10,
 // Tcp server
 'heartbeat_idle_time'      => 510,
 'heartbeat_check_interval' => 10,
 // TCP Parser
 'open_length_check'        => true,
 'package_max_length'       => 81920,
 'package_length_func'      => function ($data) {
    //...
 },
 // Coroutine
 'enable_coroutine'         => true,
 'hook_flags'               => SWOOLE_HOOK_ALL,
 'max_coroutine'            => 200000,
]);

[karevan]

Can anyone help me with this issues?

[karevan]

I checked my codes and tried to see when exactly this error occurs
Finally, I came to the conclusion that when I use Timer::tick outside of Workers, I get this error
I had to use "APCu" instead of "package_length_func" 🥲

[NathanFreeman]

Could you please provide the code on how to use Swoole\Timer?

[karevan]

Explanation of the PHP code:

HamidServer class:
This class is responsible for creating and running a Swoole server.

class HamidServer
{
    public $server;

    public function __construct(string $host, int $port)
    {
        $this->server = new Server($host, $port, SWOOLE_PROCESS, SWOOLE_SOCK_TCP);
    }

    public function start(): void
    {
        $this->server->start();
    }
}

SystemStatus class:
This class is responsible for collecting system statistics and displaying them through an HTTP server.

$prometheusServer = $server->addlistener('127.0.0.1', 8889, SWOOLE_SOCK_TCP);
$prometheusServer->set([
    'open_http_protocol' => true, // Enable HTTP protocol parsing
]);
$prometheusServer->on('request', [$this, 'on_request']);

Creating SystemStatus class in HamidServer constructor:

class HamidServer
{
    // ...
    public $systemStatus;

    public function __construct(string $host, int $port)
    {
        // ...
        $this->systemStatus = new SystemStatus($this);
    }
    // ...
}

SystemStatus class constructor:
In this section, Timer::tick is called and the necessary information for display in the output is stored.

class SystemStatus
{
    private $hamidContext;

    public function __construct(HamidServer $hamidContext)
    {
        $this->hamidContext = $hamidContext;

        Timer::tick(5000, function() {
            $serverState = $this->hamidContext->server->stats();
            // ...
        });
    }

    // ...
}

realMetric method:
This method is called for each worker and performs similar tasks as the class constructor.

class SystemStatus
{
    // ...

    public function realMetric(int $workerId): void
    {
        Timer::tick(5000, function use ($workerId) {
            // ...
        });
    }

    // ...
}

Creating realMetric in on_worker_start:

class HamidServer
{
    // ...

    public function __construct(string $host, int $port)
    {
        // ...
        $this->server->on('WorkerStart', [$this, 'on_worker_start']);
    }

    public function on_worker_start(Server $server, int $workerId): void
    {
        if (!$server->taskworker) {
            $this->workerStatus->realMetric($workerId);
        }
    }

    // ...
}

[karevan]

I came and used APCu function instead of package_length_func
Now I ran into a problem and that was that the workers are restarted automatically
When I go and see the error log, I get something like this
malloc(): unaligned tcache chunk detected
I guess it is because of using APCu