FyberMediationAdapter: NPE in onConfigurationReadyAndValid

[too-far-away]

After integrating Fyber adapter in AdMob mediation we observe application crashes in FyberMediationAdapter. It probably happens when initialization takes longer and does not finish by the time ads start showing.
The crash happens in onConfigurationReadyAndValid when the completionCallback passed in waitForInitializationStatusAndReport is null, although annotated as non null.
The null value for this parameter does get there in case the call chain starts (for example) with requestBannerAd, which calls initializeFromBundle, which in turn calls initialize passing null in the callback argument. Finally, waitForInitializationStatusAndReport adds configuration readiness listener with no callback and sometimes this event fires twice, while the first time it was set up with the callback supposedly by AdMob initialization, and the second time after requestBannerAd was called and thus the callback is null there.
Sometimes, the event fires only once, and then everything works, so maybe the real issue is in the configuration manager.

[kapyar]

I know it might not help but Fyber is going to shut down on March. Dont think it will be priority for the team to fix issues for that provider

[too-far-away]

I maybe wrong, but as I understand they close their current mediation platform, moving applications with DAU>25K to a new platform they call Fyber FairBid. Unless they are shutting down their business...

[mathieubouissiere]

@kapyar , Fyber is not shutting down. We are shutting down legacy products in March which is not related to the product mentioned by @not-there-yet.
The product we are talking about here in this thread is Fyber Marketplace under AdMob mediation:
https://www.fyber.com/fyber-marketplace/
Regarding Fyber FairBid: https://www.fyber.com/meet-the-new-fyber-fairbid/, you are correct it's our new platform / mediation product.
Just to clarify :)
Regarding the issue I will have a look and get back to you, we have also an email thread on which I will answer.