Pino rejecting a valid json format in case of error passed as object.

[jindalAnuj]

this.logger.error({
      type: LogType.error,
      log: logPayload,
    });
 

// log payload with type , complete json
{
  type: 'Error',
  log: {
    message: 'Error occurred while getting vertical',
    metadata: {
      error: Error: Failed to list get verticals
          at **********)
          at processTicksAndRejections (node:internal/process/task_queues:96:5)
          at **********)
    }
  }
}
    
    // output
    {"level":50,"time":1704439345847,"pid":72737,"hostname":"ip-192-168-1-34.ap-south-1.compute.internal","context":"OfflineVerticalService","type":"Error","log":{"message":"Error occurred while getting vertical","metadata":{"error":{}}}}
    
    
  

• as we can see error object is getting reject. This only happens in case of few error type like typeError

[mcollina]

Errors are special objects that must be manually serialized. I'm guessing that you have not installed a proper serializer for it (there is no reproduction in the OP, just a snippet).