PHP SoapClient - 获取http标头时出错

Question

I'm using PHP SoapClient to fetch details from a soap api, it works perfectly before, then suddenly it stops working and giving me this error: (with a status of 200 OK)

{
    "faultstring": "Error Fetching http headers",
    "faultcode": "HTTP"
}

This is my code: (that runs perfectly before)

$client = new SoapClient($wsdl, array("trace"=>1, "exceptions"=>0));

Things I've tried:

disabling keep_alive

• 'keep_alive' => 0

increasing timeout from php.ini

• default_socket_timeout = 6000

increasing timeout from php code

• ini_set('default_socket_timeout', 6000);

disabling wsdl cache from php.ini

• soap.wsdl_cache_enabled=0

tried compression header

• 'compression' => SOAP_COMPRESSION_ACCEPT | SOAP_COMPRESSION_GZIP | SOAP_COMPRESSION_DEFLATE

But no luck

Don't know what I'm missing

Thanks for the help

---

My machine:

PHP: PHP 7.2.15-0ubuntu0.18.04.1

Apache: Apache/2.4.29 (Ubuntu)