Edit report at https://bugs.php.net/bug.php?id=81029&edit=1
ID: 81029
Updated by: nikic@php.net
Reported by: kdonaldson at staff dot nexigen dot digital
Summary: SOAP HTTP socket not closing on object destruction
Status: Open
Type: Bug
Package: SOAP related
Operating System: macOS and Cent OS 7
PHP Version: 7.4.19
Block user comment: N
Private report: N
New Comment:
@cmb: As it's stored in a property, shouldn't that happen automatically when the object
(and thus also its properties) are destroyed?
Previous Comments:
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[2021-05-11 11:27:24] cmb@php.net
It seems to me we're missing to undo the refcount increment[1]
when the object is destroyed.
[1] <https://github.com/php/php-src/blob/php-7.4.19/ext/soap/php_http.c#L523>
------------------------------------------------------------------------
[2021-05-11 10:32:30] kdonaldson at staff dot nexigen dot digital
Description:
------------
If a SoapClient object is constructed without specifying the 'keep_alive' option to false,
the socket never appears to be closed if it falls out of scope
The provided script should be able to reproduce this, you can check the open sockets by running the
script like: "php /path/to/script.php &" and using the resulting PID on "lsof -a
-p {pid}"
You should slowly see a list of TCP connections slowly build up over time similar to this:
php 4396 vagrant 3u IPv4 53416 0t0 TCP
homestead:57814->ec2-52-7-155-169.compute-1.amazonaws.com:https (ESTABLISHED)
php 4396 vagrant 4u IPv4 53447 0t0 TCP
homestead:57816->ec2-52-7-155-169.compute-1.amazonaws.com:https (ESTABLISHED)
php 4396 vagrant 5u IPv4 54451 0t0 TCP
homestead:57818->ec2-52-7-155-169.compute-1.amazonaws.com:https (ESTABLISHED)
If instead you were to add ['keep_alive' => false] as the options parameter on the
SoapClient you'll see that the TCP connections don't appear to build up.
While I do understand the purpose of Keep Alive to keep a single connection open, I would assume
this is still a bug as the SoapClient has gone out of scope and new SoapClient objects don't
appear to reuse the existing connection and simply ignore it creating a new one.
Test script:
---------------
<?php
function call(int $number) {
$client = new SoapClient('https://www.dataaccess.com/webservicesserver/NumberConversion.wso?WSDL');
$response = $client->NumberToWords(['ubiNum' => $number]);
return $response->NumberToWordsResult;
}
$numbers = array_fill(0, 10000, 1);
foreach ($numbers as $number) {
call($number);
}
Expected result:
----------------
The socket to be closed when the SoapClient object falls out of scope or destructs
Actual result:
--------------
The socket stays open and contributes to the open file limit / file descriptor limit
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Edit this bug report at https://bugs.php.net/bug.php?id=81029&edit=1