• CORS error with 504 Gateway timeout

    calendar Sep 1, 2023 · 4 min read · Web  ·
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    Like many developers, I often leave browser's "Developer Tools" open for websites of interests. Last week, while playing with our staging service, I saw repeated CORS errors in the Console tab and 504 Gateway Timeouts in the Network tab. It was my first time seeing these two errors together. So I decided to …


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  • Deep dive in "context canceled" errors on Go web servers

    calendar Jun 29, 2023 · 3 min read · Web Go  ·
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    At iheartjane, we use Go web server to serve Ad requests. After some time in production, we noticed a lot of “context canceled” error logs. The following screenshot of CloudWatch Log Insights query shows the frequency of “context canceled” errors. It left us puzzled about the underlying causes of these context cancels. …


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