Firebase Auth - A network error (such as timeout, interrupted connection or unreachable host) has occurred

Question

Update

My app is continuously getting this crash in live app. There are 100-200 crash per week. So I am starting a bounty on this question. If someone have solved it. Please help.

However 99% users are crash free. These crashes may be effecting my app's repo on play-store. so if I don't get solution, then I will finally remove this feature to login by email/password in FirebaseAuth :/

Problem:

I got many crashes (295 crashes from 249 users) in Android app Firebase Auth Login. 1-2% users who are trying login by email-password are getting this crash. I researched for this error and got hint that this occur when play-service is not running by this answer.

FYI google/facebook auth is running perfectly. This issue is in Login via email-password only.

What I have tried?

I tried to put a try-catch block on the login method. and tried to catch this exception. As the solution I thought to show a dialog about informing user that play-service is not running. And he can manually open play-store to start play-service, and then visit back this.

But as I can see on Fabric, crashes never come to catch block, and the app crashes when this exception occur. Because this error is thrown in FirebaseAuth SDK.

What is needed?

First I want be sure about the reason of this exception. If this occur due to play-service not running, then I want to show user a dialog. Which never shows currently, and it crashes after below exception.

Fatal Exception: com.google.android.gms.g.f: com.google.firebase.e: A network error (such as timeout, interrupted connection or unreachable host) has occurred.
       at com.google.android.gms.tasks.zzu.getResult(Unknown Source)
       at com.startech.dreamteam11.app.activities.ActivityLogin.tryLogin(Unknown Source)
       at com.startech.dreamteam11.app.activities.ActivityLogin.lambda$-wlX6lv_j3Q0nUN9OuqzHS7ZGP4(Unknown Source)
       at com.startech.dreamteam11.app.activities.-$$Lambda$ActivityLogin$-wlX6lv_j3Q0nUN9OuqzHS7ZGP4.onComplete(lambda)
       at com.google.android.gms.tasks.zzj.run(Unknown Source)
       at android.os.Handler.handleCallback(Handler.java:739)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:145)
       at android.app.ActivityThread.main(ActivityThread.java:6946)
       at java.lang.reflect.Method.invoke(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:372)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)

Code

    private void loginViaEmailPassword(String email, String pass) {
        showProgressBar();
        try {
             // check if user is registered. then try login
            FirebaseAuth.getInstance().fetchSignInMethodsForEmail(email).addOnCompleteListener(task -> {
                SignInMethodQueryResult result = task.getResult();
                if (task.isSuccessful() && result != null && result.getSignInMethods() != null && result.getSignInMethods().size() > 0) {
                    // user is registered, now try login
                    tryLogIn(email, pass, new OnFireBaseLogin() {
                        @Override
                        public void onSuccess(FirebaseUser user) {
                            // check if email is verified, if not send verification email.
                            if (user.isEmailVerified()) {
                                // user is verified, redirect to main screen
                                startMainActivity();
                            } else {
                                sendVerificationEmail(user, task1 -> {
                                    hideProgressBar();
                                    FirebaseAuth.getInstance().signOut();
                                    if (task1.isSuccessful()) {
                                        Utilities.getInstance().showDialog(ActivityLogin.this, getString(R.string.sent_verification_email), getString(R.string.msg_sent_verification_email), (dialog, which) -> {
                                            dialog.dismiss();
                                        });
                                    } else {
                                        errorMessage(getString(R.string.msg_error_sending_email));
                                    }
                                });
                            }
                        }

                        @Override
                        public void onError(int error, @Nullable Throwable exception) {
                            hideProgressBar();
                            assert exception != null;
                            {
                                App.getInstance().logException(new Exception(exception), getClass());
                                errorMessage(exception.getMessage());
                            }
                        }
                    });
                } else {
                    hideProgressBar();
                    errorMessage(getString(R.string.msg_email_not_registered));
                }
            });
        } catch (Exception e) {
            hideProgressBar();
            App.getInstance().logException(e, getClass(), true);
            Utilities.getInstance().showDialog(this, getString(R.string.some_error_occurred), getString(R.string.msg_fail_login_play_service)).show();
        }
    }

    public void tryLogIn(String email, String pass) {
        FirebaseAuth.getInstance().signInWithEmailAndPassword(email, pass).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                FirebaseUser currentUser = FirebaseAuth.getInstance().getCurrentUser();
                if (task.isSuccessful() && currentUser != null) {
                    Log.w(TAG, "signInWithCustomToken:success", task.getException());
                    successResponse(currentUser);
                } else {
                    Log.w(TAG, "signInWithCustomToken:failure", task.getException());
                    errorResponse(0, task.getException());
                }
            }
        });
    }

Answer 1

Try this code

bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (Validation.loginValidation(edtEmail, edtPass)) {
                    loginFirebase(edtEmail.getText().toString(), edtPass.getText().toString(), firebaseAuth);
                }
            }
        });




public void loginFirebase(String email, String pass, FirebaseAuth firebaseAuth) {
        progressDialog.setTitle("Please Wait.....");
        progressDialog.setMessage("Processing....");
        progressDialog.setCancelable(false);
        progressDialog.show();
        (firebaseAuth.signInWithEmailAndPassword(email, pass)).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                if (task.isSuccessful()) {
                    progressDialog.dismiss();
                    Toast.makeText(getActivity(), "Login Successful", Toast.LENGTH_LONG).show();
                    Intent i = new Intent(getActivity(), DrawerMain.class);
                    startActivity(i);
                    edtEmail.setText("");
                    edtPass.setText("");
                } else {
                    Log.e("Error", task.getException().toString());
                    Toast.makeText(getActivity(), task.getException().getMessage(), Toast.LENGTH_LONG).show();
                }
            }
        });
    }

I hope that can help you!

Thank You.

Answer 2

When you use addOnCompleteListener, you always need to check if the task is successful.

Try the follow,

somethingTask().addOnCompleteListener(task -> {
    if (!task.isSuccessful()) {
        Log.wtf(TAG, "somethingTask:ERROR", task.getException());
        return;
    }
    Log.i(TAG, "somethingTask:SUCCESS");
    // Now we are logged in, let's write next code!
}

I'm writing this answer based on your error stack trace which is throwing the error from getResult in the tryLogin method.

+ You won't catch the exception like that kind of way, since addOnCompleteListener is an asynchronous method.