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Description
Description
The following code:
<?php
class A
{
public $b;
}
class B
{
public $a;
}
function buildCycle()
{
$a = new A();
$b = new B();
$a->b = $b;
$b->a = $a;
}
function failySoapCall()
{
try {
new SoapClient('https://nowhere.inexistent.space/?WSDL');
}
catch (Exception) {
echo "Soap call failed\n";
}
}
function gc()
{
gc_collect_cycles();
echo "GC Runs: " . gc_status()['runs'] . "\n";
}
buildCycle();
gc();
buildCycle();
gc();
buildCycle();
gc();
failySoapCall();
buildCycle();
gc();
buildCycle();
gc();
buildCycle();
gc();Resulted in this output:
GC Runs: 1
GC Runs: 2
GC Runs: 3
Soap call failed
GC Runs: 3
GC Runs: 3
GC Runs: 3
But I expected this output instead:
GC Runs: 1
GC Runs: 2
GC Runs: 3
Soap call failed
GC Runs: 4
GC Runs: 5
GC Runs: 6
The SOAP exception apparently stops the garbage collector. I experienced this problem with a large, long running process. Its memory usage is intensive but stable. Until it encounters a SOAP exception: its memory usage skyrockets, and gc_status() reports that no more gc run is done.
PHP Version
PHP 8.1.13
Operating System
Alpine 3.16