Why does updated content fail to update on the client side?

Why does updated content fail to update on the client side?

• A. The content is still cached in the dispatcher after the CDN flush.
• B. There is no invalidate section present in the dispatcher configuration to invalidate the updated.
• C. The file was cached on the client side in the browser cache.
• D. The flush occurred before the content was replicated because there are a lot of items in the queue.

Answer: (D)

Propagating updates through the caching/edge delivery layer takes time. When you flush, edge caches should invalidate the old content, but this process is asynchronous. If the replication queue is long, the flush may be handled quickly on the dispatcher side while the updated content still needs to reach all edge nodes. Until replication completes, requests hit caches that still hold the old version, so the client doesn’t see the update. This timing delay from a busy queue explains why updated content appears not to update on the client side. Other possibilities, like browser caching or missing invalidate rules, describe different failure modes, but the observed behavior fits a delayed replication due to a long queue.

Propagating updates through the caching/edge delivery layer takes time. When you flush, edge caches should invalidate the old content, but this process is asynchronous. If the replication queue is long, the flush may be handled quickly on the dispatcher side while the updated content still needs to reach all edge nodes. Until replication completes, requests hit caches that still hold the old version, so the client doesn’t see the update. This timing delay from a busy queue explains why updated content appears not to update on the client side. Other possibilities, like browser caching or missing invalidate rules, describe different failure modes, but the observed behavior fits a delayed replication due to a long queue.