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In cases where an ad fails to load, a callback is called which provides a LoadAdError object.

For an AdView, the following is called:

public void onAdFailedToLoad(LoadAdError adError);

fun onAdFailedToLoad(error: LoadAdError)

Here is a code snippet that illustrates the information available when an ad fails to load:

@Override
public void onAdFailedToLoad(LoadAdError error) {
  // Gets the domain from which the error came.
  String errorDomain = error.getDomain();
  // Gets the error code. See
  // https://developers.google.com/android/reference/com/google/android/gms/ads/AdRequest#constant-summary
  // for a list of possible codes.
  int errorCode = error.getCode();
  // Gets an error message.
  // For example "Account not approved yet". See
  // https://support.google.com/admob/answer/9905175 for explanations of
  // common errors.
  String errorMessage = error.getMessage();
  // Gets additional response information about the request. See
  // https://developers.google.com/admob/android/response-info for more
  // information.
  ResponseInfo responseInfo = error.getResponseInfo();
  // Gets the cause of the error, if available.
  AdError cause = error.getCause();
  // All of this information is available using the error's toString() method.
  Log.d("Ads", error.toString());
}

override fun onAdFailedToLoad(error: LoadAdError) {
  // Gets the domain from which the error came.
  val errorDomain = error.domain
  // Gets the error code. See
  // https://developers.google.com/android/reference/com/google/android/gms/ads/AdRequest#constant-summary
  // for a list of possible codes.
  val errorCode = error.code
  // Gets an error message.
  // For example "Account not approved yet". See
  // https://support.google.com/admob/answer/9905175 for explanations of
  // common errors.
  val errorMessage = error.message
  // Gets additional response information about the request. See
  // https://developers.google.com/admob/android/response-info for more
  // information.
  val responseInfo = error.responseInfo
  // Gets the cause of the error, if available.
  val cause = error.cause
  // All of this information is available using the error's toString() method.
  Log.d("Ads", error.toString())
}

This information can be used to more accurately determine what caused the ad load to fail. In particular, for errors under the domain MobileAds.ERROR_DOMAIN, the message can be looked up in this help center article for a more detailed explanation and possible actions that can be taken to resolve the issue.

Debug common error logging messages

In version 23.5.0 of the Google Mobile Ads SDK, verbose logging was enhanced to include a stack trace of where the ad fails to load. These message don't indicate a crash, but rather identify the unique source of the error. The following table provides common error logs, descriptions, and suggested actions for resolution: