java.util.ConcurrentModificationException: This exception has no message.

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via Terracotta by Shake, 1 year ago
This exception has no message.
via Google Groups by Thomas Barth, 5 months ago
This exception has no message.
via Terracotta Project Issue Tracker by Geert Bevin, 1 year ago
This exception has no message.
via Stack Overflow by pars
, 2 years ago
java.util.ConcurrentModificationException:
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:792)
at java.util.HashMap$EntryIterator.next(HashMap.java:829)
at org.json.JSONObject.writeTo(JSONObject.java:666)
at org.json.JSONObject.toString(JSONObject.java:636)
at com.onesignal.OneSignalStateSynchronizer$UserState.persistState(OneSignalStateSynchronizer.java:269)
at com.onesignal.OneSignalStateSynchronizer$UserState.access$000(OneSignalStateSynchronizer.java:124)
at com.onesignal.OneSignalStateSynchronizer.syncUserState(OneSignalStateSynchronizer.java:359)
at com.onesignal.OneSignalStateSynchronizer$NetworkHandlerThread$1.run(OneSignalStateSynchronizer.java:314)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.os.HandlerThread.run(HandlerThread.java:60)

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