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"URL_UNREACHABLE-UNREACHABLE_5xx" error happens in Cloud Run

I am running an API on Cloud Run regularly from Cloud Scheduler.

Suddenly, I got a URL_UNREACHABLE-UNREACHABLE_5xx error.
I did not change the source code or redeploy Cloud Run, but the error stopped.

In my local environment with the same source code and settings (environment variables, external API endpoints), it works fine.
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1 REPLY 1

The problem was caused by an error in the source code I wrote.🙏