Yii2-swiftmailer发邮件失败报fwrite(): SSL: Broken pipe

个人博客原文地址：http://www.lampnick.com/php/706

Yii2版本：2.0.3

SwiftMail版本：v5.3.1

使用定时任务发邮件时，由于swiftmailer长时间运行没有关闭transport，造成SSL连接出错。

报错1：

exception 'Swift_TransportException' with message 'Expected response code 250 but got code "", with message ""' in
vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php:383

报错2：

exception 'yii\base\ErrorException' with message 'fwrite(): SSL: Broken pipe' in  
vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php:232

解决方案：

1.修改vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mailer.php:90

public function send(Swift_Mime_Message $message, &$failedRecipients = null)
{
$failedRecipients = (array) $failedRecipients;

if (!$this->_transport->isStarted()) {
$this->_transport->start();
}

$sent = 0;

try {
$sent = $this->_transport->send($message, $failedRecipients);
} catch (Swift_RfcComplianceException $e) {
foreach ($message->getTo() as $address => $name) {
$failedRecipients[] = $address;
}
} catch (\Exception $exception) {
$this->_transport->stop();
sleep(10);
throw $exception;
} finally {
$this->_transport->stop();
sleep(1);
}

return $sent;
}

2.在调用发送邮件处进行失败重试

/**
* @return bool
*/
private function sendEmail()
{
$tmpPath = \Yii::$app->getRuntimePath() . '/logs/';
$tmpFilePath = File::downFileForNotExist($tmpPath, $this->filePath);
$result = \Yii::$app->mailer->compose()
->setTo($this->emailTo)
->setFrom(['nick@lampnick.com' => 'lampNick'])
->setSubject($this->subject)
->setTextBody($this->body)
->attach($tmpFilePath)
->send();
@unlink($tmpFilePath);
return $result;
}

/**
* 尝试发邮件
*/
private function trySendMail()
{
$tryCount = self::TRY_COUNT;
while ($tryCount > 0) {
try {
$sendResult = $this->sendEmail();
if (!$sendResult) {
throw new SendMailAsynException;
}
return;
} catch (\Exception $e) {
$tryCount--;
\Yii::error("swiftMailer发邮件失败，重试发送，失败原因是：" . (string)$e);
\Yii::getLogger()->flush(true);
$this->trySendMail();
}
}
}