ConcurrentModificationException in 20.5.0

[markus.w...@gmail.com]

This is a stacktrace I just saw in the Google Play Console, from an Android 12 device:

java.util.ConcurrentModificationException:         at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:760)
        at java.util.LinkedHashMap$LinkedEntryIterator.next(LinkedHashMap.java:793)
        at java.util.LinkedHashMap$LinkedEntryIterator.next(LinkedHashMap.java:791)
        at com.google.android.gms.ads.internal.csi.b.b(:com.google.android.gms.policy_ads_fdr_dynamite@213806100@213806100057.397311113.397311113:2)
        at com.google.android.gms.ads.internal.csi.a.run(:com.google.android.gms.policy_ads_fdr_dynamite@213806100@213806100057.397311113.397311113:28)
  at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1167)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:641)
  at java.lang.Thread.run (Thread.java:920)

And no, I cannot provide Charles logs, don't ask.

[Mobile Ads SDK Forum Advisor]

Hi Markus,

Thank you for reaching out to us.

For us to further investigate this, could you please provide the following details via Reply privately to author option or send it directly to mobileads...@gmail.com? Kindly inform us on this thread if you sent it directly to the email provided.

• Sample app
• Steps to replicate
• SDK Version Used

Regards,

Teejay Wennie Pimentel Mobile Ads SDK Team

 

ref:_00D1U1174p._5004Q2TKwFF:ref

[markus.w...@gmail.com]

Ah yes, the standard response...

If I see a crash in the Google Play Console there is usually no way for me to reproduce the issue, since I don't see the same ads as the users do.

SDK version is 20.5.0.

Markus

[Mobile Ads SDK Forum Advisor]

Hi Markus,

Thank you for your response.

Can you confirm if you have any mediation used in your project? Also, if you can provide the complete logs you encountered as well as the affected device and version. You can send it via Reply privately to author option or send it directly to mobileads...@gmail.com. Kindly inform us on this thread if you sent it directly to the email provided.

Regards,

Princess Pamela Pineda Mobile Ads SDK Team

ref:_00D1U1174p._5004Q2TKwFF:ref

[markus.w...@gmail.com]

I don't have any mediation used in my project. The SDK version is 20.5.0.

I can only give you the information I see in the Google Play Console, it does not include log output.

So far it's only one report: Android 12 (SDK 31), Google Pixel 4 XL

Again, the stack trace is:

java.util.ConcurrentModificationException:         at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:760)
        at java.util.LinkedHashMap$LinkedEntryIterator.next(LinkedHashMap.java:793)
        at java.util.LinkedHashMap$LinkedEntryIterator.next(LinkedHashMap.java:791)
        at com.google.android.gms.ads.internal.csi.b.b(:com.google.android.gms.policy_ads_fdr_dynamite@213806100@213806100057.397311113.397311113:2)
        at com.google.android.gms.ads.internal.csi.a.run(:com.google.android.gms.policy_ads_fdr_dynamite@213806100@213806100057.397311113.397311113:28)
  at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1167)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:641)
  at java.lang.Thread.run (Thread.java:920)

[Mobile Ads SDK Forum Advisor]

Hi Markus,

Thank you for your response.

We're unable to reproduce this error in our Sample App Android, in order for us to debug further, we'll be needing a sample app that can reliably reproduce the reported behavior. If the issue were not reliably reproducible, kindly provide to us the percentage occurrence of the said crash instead. Once provided, we will share this to the rest of the team for further investigation.

[Mobile Ads SDK Forum Advisor]

Hi Markus,

In addition to what I requested, you can send it via Reply privately to author option or send it directly to mobileads...@gmail.com. Kindly inform us on this thread if you sent it directly to the email provided.