ConcurrentModificationException on cancel

[yaalaa]

Prerequisites -

• Android SDK: API34 (API33)
• Runtime: API33, API30
• com.android.volley:volley:1.2.1

Steps -

• start loading several images
• cancel all

Expected -

• loaders are canceled

Actual -

• app crashes with exception ConcurrentModificationException
• stack looks like

  java.util.ConcurrentModificationException
  at java.util.HashMap$HashIterator.nextNode(HashMap.java:1441)
  at java.util.HashMap$ValueIterator.next(HashMap.java:1470)
  at com.android.volley.toolbox.ImageLoader$4.run(ImageLoader.java:495)
  at android.os.Handler.handleCallback(Handler.java:938)
  at android.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:236)
  at android.app.ActivityThread.main(ActivityThread.java:8061)
  at java.lang.reflect.Method.invoke(Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:656)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:967)

Any help?

[jpd236]

This looks like a duplicate of #205. If you could provide sample code there that at least somewhat consistently reproduces the issue, that would be quite helpful.