IMA AdsLoader throwing an error with error code 1009 on pre-roll (with valid response on VAST inspector)

[nishantkp]

Issue description

Video doesn't load pre-roll. In VAST inspector I can still see the valid response, but when player tries to play the video, it does not play pre-roll and prints out log saying,

2020-02-11 13:52:21.026 4918-4918/com.google.android.exoplayer2.demo I/ImaAdsLoader: AdEvent: {errorMessage=The response does not contain any valid ads., errorCode=1009, type=adLoadError}
2020-02-11 13:52:21.531 4918-4918/com.google.android.exoplayer2.demo W/ImaAdsLoader: Unexpected loadAd in an ad group with no remaining unavailable ads
2020-02-11 13:52:30.366 4918-4918/com.google.android.exoplayer2.demo I/ImaAdsLoader: AdEvent: {errorMessage=VAST media file loading reached a timeout of 8 seconds., errorCode=402, type=adPlayError}

P.S. This one seems similar to issue #4779. But this one is for pre-roll instead of post-roll.

Reproduction steps

Just play any video with provided adTag on demo app

Link to test content

Sample ad tag : https://pubads.g.doubleclick.net/gampad/ads?ciu_szs=300x250,728x90&sz=320x240&impl=s&gdfp_req=1&env=vp&output=xml_vmap1&unviewed_position_start=1&ad_rule=1&pp=global_go&correlator=1581445916&cmsid=2495352&iu=6872/shaw.mob.globaltv.com&vid=GLOB0056281260000000&cust_params=device%3Dandroidtablet%26bdu%3DShawGo%26version%3D3.0.0%26market%3D%26vmap%3Dyes%26mobileapp_idfa%3D33ca2f41-f9fb-4d63-bbd4-1dbe43cb00e0%26mobileapp_dnt%3Dfalse%26description_url%3Dhttps%3A%2F%2Fwww.globaltv.com%26mobileapp_ua%3DDalvik%2F2.1.0+%28Linux%3B+U%3B+Android+7.0%3B+SM-T813+Build%2FNRD90M%29%26mobileapp_url%3Dhttps%3A%2F%2Fplay.google.com%2Fstore%2Fapps%2Fdetails%3Fid%3Dcom.shawmedia.smglobal%26mobileapp_osversion%3D7.0%26mobileapp_carrier%3Dnone%26mobileapp_network%3Dwifi

A full bug report captured from the device

• Reproducible on demo app

Version of ExoPlayer being used

2.10.7 and onwards

Device(s) and version(s) of Android being used

Any devices with api 21 and above. Did not checked on lower versions.

[andrewlewis]

There are two prerolls and one of them is empty, and I think what's going on is that we skip the entire preroll ad group as a result of seeing the empty ad, similar to #5006. Assuming it's the same issue, this should be fixed once we can upgrade to the new preloading API (#6429), and that upgrade is blocked waiting for a backend rollout the IMA team is working on at the moment (we still don't have a firm ETA on that but I understand they are making progress).

[nishantkp]

Hi @andrewlewis thanks for the clarification. So it is better to avoid fill issues for pre-roll till this is fixed.

[andrewlewis]

Yes, that's right. Thanks. I'll close this for now as there is a workaround and #6429 tracks the "proper" fix.