Facebook PHP SDK:未知的SSL协议错误

我有一个PHP脚本，该脚本使用Facebook SDK为PHP向Facebook API Graph发出获取"请求.

I have a PHP script who make "get" requests to the Facebook API Graph with the Facebook SDK for PHP.

几天以来，我的脚本失败了(50％或更多的时间)，我遇到了以下错误:

For a few days, my script fails (50% of the time, or more), I've got this error:

与graph.facebook.com:443相关的未知SSL协议错误

Unknown SSL protocol error in connection to graph.facebook.com:443

我不知道为什么，因为:

and I don't know why because:

• 我没有修改脚本.
• 我没有更改服务器上的任何内容.
• 此外，我的脚本在2台服务器上运行，而这两个服务器上都出现了问题.

以下是详细信息:

#0/var/www/oie/vendor/facebook/php-sdk-v4/src/Facebook/FacebookClient.php(216):Facebook \ HttpClients \ FacebookCurlHttpClient-> send(' https://graph.f ...'，'GET'，''，Array，60)#1/var/www/oie /vendor/facebook/php-sdk-v4/src/Facebook/Facebook.php(469):Facebook \ FacebookClient-> sendRequest(Object(Facebook \ FacebookRequest))#2/var/www/oie/vendor/facebook/php/php -sdk-v4/src/Facebook/Facebook.php(342):Facebook \ Facebook-> sendRequest('GET'，'273607869342343 ...'，Array，NULL，NULL，NULL)#3/var/www/oie /src/AppBundle/Controller/APIGraphController.php(239):Facebook \ Facebook-> get('273607869342343 ...')#4 [内部功能]:AppBundle \ Controller \ APIGraphController-> importAction(Object(Symfony \ Component \ HttpFoundation \ Request))#5/var/www/oie/var/bootstrap.php.cache(3042):call_user_func_array(Array，Array)#6/var/www/oie/var/bootstrap.php.cache(2997) :Symfony \ Component \ HttpKernel \ HttpKernel-> handleRaw(Object(Symfony \ Component \ HttpFoundation \ Requ est)，1)#7/var/www/oie/var/bootstrap.php.cache(2337):Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request)，1，true )#8/var/www/oie/web/app.php(18):Symfony \ Component \ HttpKernel \ Kernel-> handle(Object(Symfony \ Component \ HttpFoundation \ Request))#9 {main}

#0 /var/www/oie/vendor/facebook/php-sdk-v4/src/Facebook/FacebookClient.php(216): Facebook\HttpClients\FacebookCurlHttpClient->send('https://graph.f...', 'GET', '', Array, 60) #1 /var/www/oie/vendor/facebook/php-sdk-v4/src/Facebook/Facebook.php(469): Facebook\FacebookClient->sendRequest(Object(Facebook\FacebookRequest)) #2 /var/www/oie/vendor/facebook/php-sdk-v4/src/Facebook/Facebook.php(342): Facebook\Facebook->sendRequest('GET', '273607869342343...', Array, NULL, NULL, NULL) #3 /var/www/oie/src/AppBundle/Controller/APIGraphController.php(239): Facebook\Facebook->get('273607869342343...') #4 [internal function]: AppBundle\Controller\APIGraphController->importAction(Object(Symfony\Component\HttpFoundation\Request)) #5 /var/www/oie/var/bootstrap.php.cache(3042): call_user_func_array(Array, Array) #6 /var/www/oie/var/bootstrap.php.cache(2997): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #7 /var/www/oie/var/bootstrap.php.cache(2337): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #8 /var/www/oie/web/app.php(18): Symfony\Component\HttpKernel\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #9 {main}

出什么问题了?