Enable debug logging in Firestore in Java, Javascript, or Swift.

enable_debug_logging.java

/******* Android **********/
// See https://firebase.google.com/docs/reference/android/com/google/firebase/firestore/FirebaseFirestore.html#setLoggingEnabled(boolean)
FirebaseFirestore.setLoggingEnabled(true);

/******* Server-side Java **********/
/** 
  See https://medium.com/@hiranya911/logging-in-java-libraries-for-firebase-and-google-cloud-platform-f8742493b73f
  1) Add the slf4j-simple binding to the application classpath
  2) Set the -Dorg.slf4j.simpleLogger.defaultLogLevel=debug system property
**/

enable_debug_logging.js

// https://firebase.google.com/docs/reference/js/firebase.firestore#setloglevel
firebase.firestore.setLogLevel('debug');

enable_debug_logging.swift

// https://firebase.google.com/docs/reference/swift/firebasefirestore/api/reference/Classes/Firestore#enablelogging_

Firestore.enableLogging(true)

logging.properties

# For use in Google App Engine and GCP environments
# See https://medium.com/@hiranya911/logging-in-java-libraries-for-firebase-and-google-cloud-platform-f8742493b73f

.level=INFO
com.google.firebase.level=FINE
java.util.logging.SimpleFormatter.format='%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS %4$s %2$s %5$s%6$s%n'

swift version should be

  Firestore.enableLogging(true)

👍

The JavaScript link is now https://firebase.google.com/docs/reference/js/firebase.firestore#setloglevel

👍