Outgoing Connections blocked from within Swoole HTTP Server onRequest?

[bramus]

Please answer these questions before submitting your issue. Thanks!

1. What did you do? If possible, provide a simple script for reproducing the error.

   I have a \Swoole\HTTP\Server instance that handles HTTP requests.

   At a certain moment – inside onRequest – I am trying to store data into Google Cloud Firestore, using the google/cloud-firestore package. That package communicates to the Google servers over port 443., internally using the PHP gRPC extension.

   Here's the (slimmed down) code, which is no more than a basic \Swoole\HTTP\Server implementation:

   $server = new Swoole\HTTP\Server("0.0.0.0", 9501);
   $server->on('start', function (Swoole\Server $server){
       echo "Server Started with Manager PID {$server->manager_pid} and Master PID {$server->master_pid}" . PHP_EOL;
   });
   
   $server->on('request', function(Swoole\Http\Request $request, Swoole\Http\Response $response) {
       // Create FirestoreClient
       $firestoreclient = new \Google\Cloud\Firestore\FirestoreClient([
           'keyFilePath' => __DIR__ . '/../config/credentials.json'
       ]);
   
       // Define dummy name for document
       $name = microtime(true);
   
       // Create the document inside the collection "my-collection"
       $firestoreQuery = $firestoreclient->collection('my-collection');
       $document = $firestoreQuery->document($name);
   
       // Store its data
       $document->set([
           'foo' => 'bar',
       ]);
   
       // Output name of the document
       echo $name;
   });
   
   $server->start();   

2. What did you expect to see?

   That, upon receiving a request through Swoole's $server, the Firestore Document were to be created + data would be set + the $name would be echod.

3. What did you see instead?

   The code just hangs upon the $document->set call and does nothing anymore.

   When moving the whole Firestore logic to outside of $server->on('request', …) it works just fine. When moving the whole Firestore logic to inside $server->on('start', …) it works just fine.

   It's only in $server->on('request', …) that it does not work.

4. What version of Swoole are you using (show your php --ri swoole)?

   swoole
   
   Swoole => enabled
   Author => Swoole Team <team@swoole.com>
   Version => 4.4.16
   Built => Feb 20 2020 13:55:08
   coroutine => enabled
   kqueue => enabled
   rwlock => enabled
   pcre => enabled
   zlib => 1.2.11
   brotli => E16777223/D16777223
   async_redis => enabled
   
   Directive => Local Value => Master Value
   swoole.enable_coroutine => On => On
   swoole.enable_library => On => On
   swoole.enable_preemptive_scheduler => Off => Off
   swoole.display_errors => On => On
   swoole.use_shortname => On => On
   swoole.unixsock_buffer_size => 262144 => 262144

5. What is your machine environment used (including version of kernel & php & gcc) ?

   I'm running macOS 10.15.3 with PHP 7.4.2

   Darwin XXX 19.3.0 Darwin Kernel Version 19.3.0: Thu Jan  9 20:58:23 PST 2020; root:xnu-6153.81.5~1/RELEASE_X86_64 x86_64

[matyhtf]

This package may not support coroutines. Please close the coroutines and use synchronous blocking to execute them.

$server = new Swoole\HTTP\Server("0.0.0.0", 9501);

$server->set(['enable_coroutine' => false']);

$server->on('start', function (Swoole\Server $server){
    echo "Server Started with Manager PID {$server->manager_pid} and Master PID {$server->master_pid}" . PHP_EOL;
});

[gleimerm]

Hi @bramus, did @matyhtf suggestion work for you? I'm having the same issue.

Thanks

[brogier]

Im having the same issue when connecting GRPC for AxonServer. Any ideas?

[brogier]

The thing is, if I use plain PHP without swoole server (same docker instance) its connects and I can push messages, but when I use it from a slimple swoole instance it keeps hanging on the connection. Hope this helps.

[ganl]

Im having the same issue when connecting GRPC for AxonServer. Any ideas?

Try this:

1. update grpc to 1.34+
2. add the following lines to php.ini file.

   
   grpc.enable_fork_support = 1

3. Disable opcahce
`opcache.enable_cli=0`
4.