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n8n - 💡(How to fix) Fix webhook issue [2 comments, 3 participants]

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n8n-io/n8n#28263•Fetched 2026-04-10 03:44:33
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Author
oliverpetersonic-opsoliverpetersonic-ops
Participants
krisn0xkrisn0xn8n-assistant[bot]n8n-assistant[bot]oliverpetersonic-opsoliverpetersonic-ops
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commented ×2mentioned ×2subscribed ×2closed ×1
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Bug Description

when running tests in terminal

<html> <head><title>503 Service Temporarily Unavailable</title></head> <body> <center><h1>503 Service Temporarily Unavailable</h1></center> <hr><center>nginx</center> </body> </html>

is it possible a server needs to be re booted.

To Reproduce

my webhooks are failing

Expected behavior

they dont fail.

Debug Info

Note: Unnecessary use of -X or --request, POST is already inferred.

  • Host n8n.security.overjet.ai:443 was resolved.
  • IPv6: fd53:1c5a:1000::5dbb:db14
  • IPv4: (none)
  • Trying [fd53:1c5a:1000::5dbb:db14]:443...
  • Connected to n8n.security.overjet.ai (fd53:1c5a:1000::5dbb:db14) port 443
  • ALPN: curl offers h2,http/1.1
  • (304) (OUT), TLS handshake, Client hello (1):
  • CAfile: /etc/ssl/cert.pem
  • CApath: none
  • (304) (IN), TLS handshake, Server hello (2):
  • (304) (IN), TLS handshake, Unknown (8):
  • (304) (IN), TLS handshake, Certificate (11):
  • (304) (IN), TLS handshake, CERT verify (15):
  • (304) (IN), TLS handshake, Finished (20):
  • (304) (OUT), TLS handshake, Finished (20):
  • SSL connection using TLSv1.3 / AEAD-AES256-GCM-SHA384 / [blank] / UNDEF
  • ALPN: server accepted h2
  • Server certificate:
  • subject: CN=n8n.security.overjet.ai
  • start date: Apr 2 03:13:24 2026 GMT
  • expire date: Jul 1 03:13:23 2026 GMT
  • subjectAltName: host "n8n.security.overjet.ai" matched cert's "n8n.security.overjet.ai"
  • issuer: C=US; O=Let's Encrypt; CN=R12
  • SSL certificate verify ok.
  • using HTTP/2
  • [HTTP/2] [1] OPENED stream for https://n8n.security.overjet.ai/webhook/de1c3280-7777-45b0-8268-2d0762c2b80c
  • [HTTP/2] [1] [:method: POST]
  • [HTTP/2] [1] [:scheme: https]
  • [HTTP/2] [1] [:authority: n8n.security.overjet.ai]
  • [HTTP/2] [1] [:path: /webhook/de1c3280-7777-45b0-8268-2d0762c2b80c]
  • [HTTP/2] [1] [user-agent: curl/8.7.1]
  • [HTTP/2] [1] [accept: /]
  • [HTTP/2] [1] [content-type: application/json]
  • [HTTP/2] [1] [content-length: 17]

POST /webhook/de1c3280-7777-45b0-8268-2d0762c2b80c HTTP/2 Host: n8n.security.overjet.ai User-Agent: curl/8.7.1 Accept: / Content-Type: application/json Content-Length: 17

  • upload completely sent off: 17 bytes < HTTP/2 503 < date: Thu, 09 Apr 2026 15:15:19 GMT < content-type: text/html < content-length: 190 < strict-transport-security: max-age=15724800; includeSubDomains <
<html> <head><title>503 Service Temporarily Unavailable</title></head> <body> <center><h1>503 Service Temporarily Unavailable</h1></center> <hr><center>nginx</center> </body> </html> * Connection #0 to host n8n.security.overjet.ai left intact oliverpeterson@OliverPeterson safepickup-deploy %

Operating System

mac

n8n Version

not sure

Node.js Version

not sure

Database

SQLite (default)

Execution mode

main (default)

Hosting

n8n cloud

extent analysis

TL;DR

The 503 Service Temporarily Unavailable error from nginx suggests a server-side issue that may be resolved by checking the server's status and load.

Guidance

  • Verify the server's status and load to determine if it's overwhelmed or experiencing technical difficulties.
  • Check the n8n cloud hosting dashboard for any error messages, maintenance notifications, or server status updates.
  • Test webhooks with a minimal payload to see if the issue persists, which could indicate a problem with the webhook configuration or the server's ability to handle requests.
  • Consider reaching out to n8n cloud support for assistance with troubleshooting the 503 error, as it may be related to their infrastructure.

Example

No specific code example is applicable in this case, as the issue appears to be related to server-side configuration or infrastructure.

Notes

The exact cause of the 503 error is unclear without more information about the server's configuration, load, and recent changes. The fact that the error is coming from nginx suggests that the issue may be related to the server's reverse proxy or load balancing configuration.

Recommendation

Apply workaround: Monitor the server's status and adjust the webhook configuration or payload as needed to mitigate the issue, while awaiting further assistance from n8n cloud support.

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FAQ

Expected behavior

they dont fail.

#ssr#cache issue#memory leak#API versioning#request timeout

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