TikTok shared a post-mortem on the issue that caused multiple hashtags—including notable ones like #BlackLivesMatter and #GeorgeFloyd—to display view counts of zero.
Head of user and product operations Seth Melnick and senior back-end engineer Somar Musa said in their blog post that the issue, which impacted 225,611 unique hashtags, was caused by inefficiencies in TikTok’s data stream flushing service design.
They explained that on May 28, TikTok began receiving user reports that view counts on many hashtags were displaying with zero views in the applications compose screen, where users prepare their posts before uploading them.
TikTok began investigating two potential causes: an issue in its code, or a data loading or lagging issue.
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