puchengy opened a new pull request, #5388:
URL: https://github.com/apache/gravitino/pull/5388

   ### What changes were proposed in this pull request?
   
   As title.
   
   ### Why are the changes needed?
   
   There are use cases required server logs to be viewed from logsearch tools 
such as Kibana. These use cases recommends log format to be json.
   
   Based on 
https://logging.apache.org/log4j/2.x/manual/json-template-layout.html, 
`log4j-layout-template-json` is needed to enable json layout for log4j.
   
   ### Does this PR introduce _any_ user-facing change?
   
   No.
   
   ### How was this patch tested?
   
   Tested locally with modified lo4j property file.
   ```
   appender.rolling.layout.type = JsonTemplateLayout
   appender.rolling.layout.eventTemplate = ...
   ```


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