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A new item missing from the index

Right after writing an order, a query on a DynamoDB global secondary index sometimes does not return it. Strongly consistent reads give an error on the GSI. Why?

A.GSIs update asynchronously and allow only eventual readsB.The write must have failed silently in the tableC.GSIs only show new items after a full hourD.The partition key value was too long to index

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A new item missing from the index

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