** Description changed:

+ [ Impact ]
+ 
+ Users see an error like
+ FastCGI sent in stderr: "scoreboard: failed to lock (already locked); status: 
unable to find or access status shared memory"
+ when using PHP-FPM.
+ 
+ The fix for this issue has been applied upstream in version 8.3.16, and
+ it's being backported to 8.3.6 here.
+ 
+ [ Test Plan ]
+ 
+ As the bug is caused by a race condition and may not affect all environments, 
it's not easy to reproduce it for testing.
+ However, the reporter has been experiencing it in their environment, and have 
tested a PPA version with the patch applied, confirming it has been solved on 
their end.
+ So for testing this, we agree that the reporter will test the package from 
-proposed and confirm in this bug that the problem is not happening anymore.
+ 
+ [ Where problems could occur ]
+ 
+ As this is an upstream patch, we are confident it's correct. We have
+ checked it is compatible with version 8.3.6 by checking the code and how
+ the changes are isolated, and hope that any unseen incompatibility will
+ be caught in autopkgtests.
+ 
+ The testing is being performed by an user instead of a deterministic script. 
Problems and approaches are:
+ - there may be errors in the setup/testing:
+   - we ask for outputs of apt-policy to make sure the package is installed 
from -proposed, and
+   - the user is able to generate a graph with the error counts, pointing out 
when the package was installed and for how much time it was in use
+ - the user environment may not represent all environments:
+   - we are confident this is not the case, as upstream discussion in the bug 
show several people with similar configurations going through the same bug.
+ 
+ [ Original description ]
+ 
  There is a bug present in PHP versions < 8.3.16 that has been fixed in
  newer versions.  This affects PHP-FPM.
  
- 
- The error is as follows:  
+ The error is as follows:
  FastCGI sent in stderr: "scoreboard: failed to lock (already locked); status: 
unable to find or access status shared memory"
  
  This was fixed in PHP 8.3.16
  https://www.php.net/ChangeLog-8.php#8.3.16
  Fixed bug GH-13437 (FPM: ERROR: scoreboard: failed to lock (already locked)).
  
  GitHub Issue:  https://github.com/php/php-src/issues/13437
  
  Please backport this bug fix to PHP 8.3.6.

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https://bugs.launchpad.net/bugs/2130569

Title:
  php-fpm scoreboard: failed to lock

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