[Mailer] Fix Sendmail memory leak #59256
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nicolas-grekas
approved these changes
Jan 7, 2025
| @@ -114,7 +114,7 @@ protected function doSend(SentMessage $message): void | |||
| $this->stream->setCommand($command); | |||
| $this->stream->initialize(); | |||
| foreach ($chunks as $chunk) { | |||
| $this->stream->write($chunk); | |||
| $this->stream->write($chunk, false); | |||
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For next reviewers: this sets the debug flag, so that the stream instance doesn't keep a string copy of what was written. This debug info is not accessible anywhere anyway.
That's similar to:
https://github.com/rch7/symfony/blob/c74e2a3d7e1df817b2bea7d8f6a8fc3373c445bb/src/Symfony/Component/Mailer/Transport/Smtp/SmtpTransport.php#L222
|
Thank you @rch7. |
This was referenced Jan 29, 2025
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Previous PR: #59239
Fixes issue #50486 (Sendmail transport runs out of memory).
So for example if you have loop sending personalized emails to 200,000 subscribers 20 kB each, $this->debug becomes 4 GB, plus overhead, and the script runs out of resources.
The fix eliminates the problem.