where is the log file when databrick playground

[pradeep_singh]

For every endpoint there will be an inference table that can be configured to store the logs . 
https://docs.databricks.com/aws/en/ai-gateway/inference-tables#enable-and-disable-inference-tables

You can then query and analyze this table - 

https://docs.databricks.com/aws/en/ai-gateway/inference-tables#query-and-analyze-results-in-the-infe...