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Process创建进程挂载到Server，发生异常自动重启后，exportSocket导出的Socket无法recv

### 问题描述
Process创建进程挂载到HttpServer，pipeType为SOCK_DGRAM，能正常在worker发送数据到Process，一旦发生异常自动重启后，exportSocket导出的Socket->recv总是空，无法在通信。是进程退出时把pipe销毁掉了么？

### Swoole版本，PHP版本，以及操作系统版本信息
```
PHP 7.4.7 (cli) (built: Jun 12 2020 07:44:05) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.7, Copyright (c), by Zend Technologies
	
Swoole => enabled
Author => Swoole Team <team@swoole.com>
Version => 4.5.2
Built => Aug 22 2020 06:35:03
coroutine => enabled
epoll => enabled
eventfd => enabled
signalfd => enabled
cpu_affinity => enabled
spinlock => enabled
rwlock => enabled
sockets => enabled
openssl => OpenSSL 1.1.1g  21 Apr 2020
http2 => enabled
pcre => enabled
zlib => 1.2.11
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
mysqlnd => enabled
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 => 8388608 => 8388608
```

### 相关代码
https://github.com/NHZEX/think-swoole/blob/91d34cf741731900bb35f278436f838687f8fc59/src/contract/ProcessAbstract.php#L114-L138

### 你期待的结果是什么？实际看到的错误信息又是什么？
进程重启后能通过pipe继续接收消息

发布于4年前 · 0 次浏览 · 来自提问

zxin

### 相关代码
https://github.com/NHZEX/think-swoole/blob/91d34cf741731900bb35f278436f838687f8fc59/src/contract/ProcessAbstract.php#L114-L138

### 你期待的结果是什么？实际看到的错误信息又是什么？
进程重启后能通过pipe继续接收消息

2020-09-04

鲁飞

2020-09-04

zxin 回复鲁飞

2020-09-04

zxin 回复鲁飞

问题复现代码
```
<?php

use Swoole\Coroutine;
use Swoole\Coroutine\Socket;
use Swoole\ExitException;
use Swoole\Http\Server;
use Swoole\Process;
use Swoole\Runtime;
use Swoole\Timer;

$serv = new Server('0.0.0.0', 9511);
$serv->set([
    'worker_num' => 1,
]);

$process = new Process(function (Process $proc) {
    Runtime::enableCoroutine(true);
    echo "process start#{$proc->id}, pid={$proc->pid}\n";

Coroutine::create(function () use ($proc) {
        /** @var Socket $socket */
        $socket = $proc->exportSocket();
        while (true) {
            $data = $socket->recv();
            if ($data === false) {
                echo "process pipe: [{$socket->errCode}] {$socket->errMsg}\n";
                break;
            }
            if ($data === '') {
                echo "process pipe: down [empty recv]\n";
                break;
            }
            echo "process recv: {$data}\n";
        }
    });

Timer::after(1000 * 5, function () {
        echo "warning!!!\n";
        throw new ExitException('test');
    });

}, false, SOCK_DGRAM, true);

$serv->addProcess($process);

$serv->on('workerStart', function (Server $serv) use ($process) {
    Runtime::enableCoroutine(true);
    echo "worker start#{$serv->worker_id}\n";

Timer::tick(1000, function () use ($process, $serv) {
        /** @var Socket $socket */
        $socket = $process->exportSocket();

$str = date('H:i:s.') . mt_rand();

$socket->send("worker#{$serv->worker_id} send, {$str}");
    });
});
$serv->on('request', function () {
});

$serv->start();
```
执行结果
```
vagrant@homestead:~/code$ php swp-test.php 
worker start#0
process start#1, pid=10432
process recv: worker#0 send, 15:01:12.1817550843
process recv: worker#0 send, 15:01:13.1258003387
process recv: worker#0 send, 15:01:14.823978948
process recv: worker#0 send, 15:01:15.1189333991
warning!!!
PHP Fatal error:  Uncaught Swoole\ExitException: test in /home/vagrant/code/swp-test.php:39
Stack trace:
#0 {main}
  thrown in /home/vagrant/code/swp-test.php on line 39

Fatal error: Uncaught Swoole\ExitException: test in /home/vagrant/code/swp-test.php:39
Stack trace:
#0 {main}
  thrown in /home/vagrant/code/swp-test.php on line 39
[2020-09-03 15:01:16 $10429.0]	WARNING	swManager_check_exit_status: worker#1[pid=10432] abnormal exit, status=255, signal=0
process start#1, pid=10433
process recv: worker#0 send, 15:01:16.728083935
process pipe: down [empty recv]
warning!!!
PHP Fatal error:  Uncaught Swoole\ExitException: test in /home/vagrant/code/swp-test.php:39
Stack trace:
#0 {main}
  thrown in /home/vagrant/code/swp-test.php on line 39

Fatal error: Uncaught Swoole\ExitException: test in /home/vagrant/code/swp-test.php:39
Stack trace:
#0 {main}
  thrown in /home/vagrant/code/swp-test.php on line 39
[2020-09-03 15:01:21 $10429.0]	WARNING	swManager_check_exit_status: worker#1[pid=10433] abnormal exit, status=255, signal=0
process start#1, pid=10434
process pipe: down [empty recv]
warning!!!
PHP Fatal error:  Uncaught Swoole\ExitException: test in /home/vagrant/code/swp-test.php:39
Stack trace:
#0 {main}
  thrown in /home/vagrant/code/swp-test.php on line 39

```

异常退出复活后如何pipe就废掉了么

2020-09-04

鲁飞

升级swoole版本，v4.5.3测试没问题

```
[root@VM_32_17_centos ~]# php test.php 
process start#1, pid=18016
worker start#0
process recv: worker#0 send, 09:00:08.1391941609
process recv: worker#0 send, 09:00:09.521453295
process recv: worker#0 send, 09:00:10.2084891508
process recv: worker#0 send, 09:00:11.1867294689
warning!!!
PHP Fatal error:  Uncaught Swoole\ExitException: test in /root/test.php:40
Stack trace:
#0 {main}
  thrown in /root/test.php on line 40
[2020-09-04 09:00:12 $18010.0]  WARNING check_worker_exit_status: worker#1[pid=18016] abnormal exit, status=255, signal=0
process start#1, pid=18132
process recv: worker#0 send, 09:00:12.1912386844
process recv: worker#0 send, 09:00:13.1105720605
process recv: worker#0 send, 09:00:14.1533027499
process recv: worker#0 send, 09:00:15.2138612964
process recv: worker#0 send, 09:00:16.483529946
process recv: worker#0 send, 09:00:17.172891150
warning!!!
PHP Fatal error:  Uncaught Swoole\ExitException: test in /root/test.php:40
Stack trace:
#0 {main}
  thrown in /root/test.php on line 40
[2020-09-04 09:00:17 $18010.0]  WARNING check_worker_exit_status: worker#1[pid=18132] abnormal exit, status=255, signal=0
process start#1, pid=18242
process recv: worker#0 send, 09:00:18.1046325242
process recv: worker#0 send, 09:00:19.1089183538
process recv: worker#0 send, 09:00:20.994746555
process recv: worker#0 send, 09:00:21.1658326585
```

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