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  1. Collections$UnmodifiableCollection$1.next() has thrown a ConcurrentModificationException
    Java Runtime
    11
    22
    2
  2. Multiple threads trying to modify ArrayList at the same time or trying to modify ArrayList while iterating over it
    Java Runtime
    208
    623
    30

Your stack trace compared to the selected pattern

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java.util.ConcurrentModificationException
    at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
    at java.util.ArrayList$Itr.next(ArrayList.java:851)
    at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1042)
    at net.dv8tion.jda.utils.PermissionUtil.getEffectivePermission(PermissionUtil.java:215)
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Solution

chinthana11 months ago

In order to avoid more than one threads accessing or modifying the same object, you can synchronize them over the object, in order to allow only one thread to manipulate it over time.

Check the source of this solution for more info

External results for this pattern (10)

  1. Franz Mayervia Google Groups1 day ago
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  2. Hipapheralkusvia GitHub1 day ago
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  3. bfitzpatvia GitHub1 day ago
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  4. fwcdvia GitHub1 day ago
    Exception while analyzing expression at (9,15) in ~/git/KotlinLanguageServer/src/main/kotlin/org/javacs/kt/formatter/KotlinFormatter.kt
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  5. greenlaw110via GitHub3 days ago
    Error init SQL db service
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  6. NiccoMltvia GitHub3 days ago
    java.util.ConcurrentModificationException
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  7. esr-haodevia GitHub3 days ago
    No message found for this stack trace.
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  8. Nevvievia GitHub5 days ago
    No message found for this stack trace.
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