Crashlytics report could not be enqueued to DataTransport (IllegalArgumentException)

[pablopatarca]

[REQUIRED] Step 2: Describe your environment

• Android Studio version: 4.0.1
• Firebase Component: Firebase Crashlytics & Firebase Crashlytics Gradle
• Component version: 17.2.1 & 2.2.0

[REQUIRED] Step 3: Describe the problem

App built with DexGuard doesn't report to Firebase Console, I cant even see the build version in the filter console.
Every time what the app is launched produce the same exception:

D/FirebaseCrashlytics: Checking for crash reports...
D/FirebaseCrashlytics: Found crash report /data/user/0/com.xxxxxxx/files/.com.google.firebase.crashlytics/nonfatal-sessions/5F64E11E01BD-0001-6C5D-32B9DF9F8C8E.cls
D/FirebaseCrashlytics: Reports are being sent.
D/FirebaseCrashlytics: Starting report processing in 1.0 second(s)...
D/FirebaseCrashlytics: No log data to include with this event.
D/FirebaseCrashlytics: Update app request ID: aca879994130dcc6ab3f551k2j4bjj23
D/FirebaseCrashlytics: No log data to include with this event.
D/FirebaseCrashlytics: Result was 204
D/FirebaseCrashlytics: Crashlytics report could not be enqueued to DataTransport
    java.lang.IllegalArgumentException: Transport backend 'cct' is not registered
        at com.google.android.datatransport.runtime.scheduling.DefaultScheduler$$Lambda$1.run(:1077)
        at com.google.android.datatransport.runtime.SafeLoggingExecutor$SafeLoggingRunnable.run(:47)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:919)

Instead if the app is built in debug (without dexguard), it works.

Steps to reproduce:

Building the project with the next configuration:

build.gradle

apply plugin: 'com.android.application'
apply plugin: 'dexguard'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'
apply plugin: 'realm-android'
apply plugin: 'com.google.android.gms.strict-version-matcher-plugin'
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'
apply plugin: 'com.google.firebase.firebase-perf'
...
release {
           firebaseCrashlytics {
                mappingFileUploadEnabled true
            }
...
dependencies {
    implementation 'com.google.firebase:firebase-core:17.2.0'
    implementation 'com.google.firebase:firebase-analytics:17.2.2'
    implementation 'com.google.firebase:firebase-crashlytics:17.1.1'
...

dexguard-rules.pro

-keepattributes SourceFile,LineNumberTable
-keep public class * extends java.lang.Exception

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[charleston10]

@pablopatarca Hi
If you can solve your problem, out of the issue let me know, pls
I am facing almost the same problem with dexguard (#1987 )

[omesquita]

i have too same problem and not find a solution.

[GauravP123]

I am also facing the same issue. Using 17.2.1. I tried with 17.1.0 still getting the same

[pablopatarca]

I've found a solution for this issue provided from the DexGuard documentation:

First off, the Crashlytics plugin should be applied before the DexGuard plugin.

apply plugin: 'com.google.firebase.crashlytics'
apply plugin: 'dexguard'

source: https://www.guardsquare.com/en/manual/dexguard/stable/gradle/dexguard-plugin.html#firebaseCrashlytics

But steal the problem doesn't resolve, the app version is not published in the firebase console 😢

[omesquita]

Here the crashlytics plugin is applied before dexguard plugin, but even so i have the same problems. The crashes aren't sended to console.

[pablopatarca]

@omesquita which plugin version are you testing with?

I'm trying with 2.3.0 for crashlytics and 8.5.06 for dexguard

[omesquita]

@omesquita which plugin version are you testing with?

I'm trying with 2.3.0 for crashlytics and 8.5.06 for dexguard

here i'm using 2.2.1 for crashlytics plugin and 8.6.09 for dexguard.

[Bersh]

In case you are still struggling with it try to add this you your dexguard/proguard config file:

-keepresourcexmlelements manifest/application/service/meta-data@value=cct

[pablopatarca]

Ok guys, I've solved the problem,
The solution requires two part:

1- Check the plugins order:
Your gradle.properties should look like this:

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'
apply plugin: 'dexguard'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'
...

2- Downgrade the firebase-crashlytics version to 17.1.0
implementation 'com.google.firebase:firebase-crashlytics:17.1.0'

Otherwise, if you want to use the las version of crashlytics, you should upgrade the DexGuard version to 8.7.06 but keeping the same order that the point 1.

And that's it!

I hope this helps you.

[omesquita]

In case you are still struggling with it try to add this you your dexguard/proguard config file:

-keepresourcexmlelements manifest/application/service/meta-data@value=cct

It worked for me. Thanks for the help.

[pablopatarca]

17.2.0 with DexGuard version to 8.6.X is working? @pablopatarca
Sorry @GauravP123, with version DexGuard 8.7.06 and Crashlytics 17.2.1 works!