fix(jsonparser): Fix possible JSON log line corruption caused by json parser on query path (backport release-3.5.x)
#18059
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…n` parser on query path (#18056) This PR fixes two bugs in the json parser: 1. A bug that caused the original log line to be mutated by the json parser when the extracted field was a nested field and collided with an already existing label name, such as in line `{"app":{"id": 123, "name": "bar"}}` and label `app_name="foo"`. 2. A bug that caused a wrong json path for the extracted field in the same conditions as 1, such as `[]string{"app", "name_extracted"}` for `app_name`, instead of `[]string{"app", "name"}`. Signed-off-by: Christian Haudum <[email protected]> (cherry picked from commit 153bbbc)
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Jun 11, 2025
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Backport 153bbbc from #18056
What this PR does / why we need it:
This PR fixes two bugs in the json parser:
A bug that caused the original log line to be mutated by the json parser when the extracted field was a nested field and collided with an already existing label name, such as in line
{"app":{"id": 123, "name": "bar"}}and labelapp_name="foo".A bug that caused a wrong json path for the extracted field in the same conditions as 1, such as
[]string{"app", "name_extracted"}forapp_name, instead of[]string{"app", "name"}.Which issue(s) this PR fixes:
Fixes #17267