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…essing Replicate the thread-safe `BatchItemFailure` collection implementation from the `processBatchInParallel(event, context)` method to the overloaded variant that additionally accepting an executor. Apply this fix to all three `BatchMessageHandler` implementations. Using a shared, unsynchronized `ArrayList` to collect `BatchItemFailure` instances can lead to lost failure items or cause a worker thread to fail with an `ArrayOutOfBoundsException` due to concurrent modifications corrupting the list's internals state. GitHub issue number: aws-powertools#2712
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Summary
Changes
Replicate the thread-safe
BatchItemFailurecollection implementation from theprocessBatchInParallel(event, context)method to the overloaded variant that additionally accepting an executor.Apply this fix to all three
BatchMessageHandlerimplementations.Using a shared, unsynchronized
ArrayListto collectBatchItemFailureinstances can lead to lost failure items or cause a worker thread to fail with anArrayOutOfBoundsExceptiondue to concurrent modifications corrupting the list's internals state.Issue number: #2712
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