cbornet opened a new pull request, #17474:
URL: https://github.com/apache/pulsar/pull/17474

   Fixes #15392
   
   ### Motivation
   
   This reverts commit 1e9a1f087e8c6fd9e78f6e3f0635113ba7927bbf.
   When using a `log-topic` in Functions, an appender is added to all loggers 
to send the logs with the Pulsar client.
   To prevent sending logs from the framework, the `LogAppender` is added 
before the function processing (`JavaInstance::handleMessage`) and removed just 
after.
   This is a problem because since #15188, the logs are sent asynchronously and 
sometimes we remove the appender before the log is processed by the 
`LogAppender`.
   And this is the reason why we see flakyness in `testJavaLoggingFunction` 
because me miss some logs.
   
   See also #17471 that proposes another way to solve the issue but that maybe 
deserves more discussions.
   
   ### Modifications
   
   This reverts commit 1e9a1f087e8c6fd9e78f6e3f0635113ba7927bbf.
   
   ### Verifying this change
   
   - [ ] Make sure that the change passes the CI checks.
   
   *(Please pick either of the following options)*
   
   This change is a trivial rework / code cleanup without any test coverage.
   
   *(or)*
   
   This change is already covered by existing tests, such as *(please describe 
tests)*.
   
   *(or)*
   
   This change added tests and can be verified as follows:
   
   *(example:)*
     - *Added integration tests for end-to-end deployment with large payloads 
(10MB)*
     - *Extended integration test for recovery after broker failure*
   
   ### Does this pull request potentially affect one of the following parts:
   
   *If `yes` was chosen, please highlight the changes*
   
     - Dependencies (does it add or upgrade a dependency): (yes / no)
     - The public API: (yes / no)
     - The schema: (yes / no / don't know)
     - The default values of configurations: (yes / no)
     - The wire protocol: (yes / no)
     - The rest endpoints: (yes / no)
     - The admin cli options: (yes / no)
     - Anything that affects deployment: (yes / no / don't know)
   
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