Cherry-pick #16514 to 7.x: Remove stateful processors from the script processor #16544
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There are some processors that keep resources that would need to be explicitly released when the processor is not needed anymore. At this moment there is no way to do it, processors have a stateless interface, so avoid using these processors in scripts. If these processors are needed, it is usually better to place them in global configuration. Processors removed are the ones used to add docker and kubernetes metadata. (cherry picked from commit 8d31a51)
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Cherry-pick of PR #16514 to 7.x branch. Original message:
What does this PR do?
Remove stateful processors from the script processor.
This is a breaking change because it will make scripts fail if they use these
processors. But it is quite unlikely that these processors are used in scripts
in production deployments because they would produce memory and file
descriptor leaks.
Why is it important?
There are some processors that keep resources that would need to be
explicitly released when the processor is not needed anymore. At this
moment there is no way to do it, processors have a stateless interface,
so avoid using these processors in scripts.
If these processors are needed, it is usually better to place them in
global configuration.
Processors removed are the ones used to add docker and kubernetes
metadata.
Related issues
More context in #16349.