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upstream connect error or disconnect/reset before headers. retried and the latest reset reason: conn

Posted 3 weeks ago
Asyraf
Bronze 1
Bronze 1
Reply posted on --/--/---- --:-- AM

Hi our webservice getting this error message. And when i check at the GCP log got warning message,

503, failed to connect to backend. Previously it working fine, no changes has been made.

Anyone experience this before ?

TQ

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1 REPLY 1

Posted on --/--/---- --:-- AM
christianpaula
Staff
Reply posted on --/--/---- --:-- AM

Hi @Asyraf,

Welcome to Google Cloud Community!

Your web service can't connect to its backend service (503 error).

  • Common causes: backend service down, firewall issues, network problems.
  • Check backend status, firewall rules, and web service logs.
  • Restart services or increase retries as temporary fixes (if applicable).