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Graph/service-reachability-port-tls-mismatch

Pattern

Listener Port / TLS Mismatch

service-reachability-port-tls-mismatch

Server listener selection and transport configuration fail to match the runtime environment, so external clients (or platforms like Render) can’t reliably reach the app. Misbound ports, IPv4/DNS issues, or HTTPS/HTTP mismatches produce “works in Postman, fails elsewhere” symptoms.

Node Details

Public graph metadata

Updated7/25/2026

Connections

30 linked nodes

no match of right-hand side value: {: error, :enoent} — when I put my website on production. Tension: Locally. All works fine, but when I put my website on production, the Resend API doesn’t work. Outcome: your production machine is missing its root cert file.

Instance failed to start because a library is missing or cannot be opened: "libcurl.so.4" — I'm using `pnpm` in Bitbucket pipelines. Tension: The test was successfully run on my Mac. Outcome: Starting the MongoMemoryServer Instance failed, enable debug log for more information.

"Application failed to respond" — hosted on Railway. Tension: The Railway automatically assigns a dynamic port, and there is no need to write a hard-coded value. Outcome: erasing the port environmental variable from Railway.

TypeError: listener is not a function — I am unable to access the node server. Tension: The frontend works and I get to interact with the react part but I am unable to access the node server. Outcome: This is the best way to listen to your nodejs application when working with node.

Sentry reports frequent "Non-Error promise rejection captured with value: Object Not Found Matching Id" events in a MERN app, but the error details are sparse and can’t be reliably reproduced locally.

requests with the forbidden fields sailed through to the write path. Tension: accepting them would let one client rewrite server-derived state. Outcome: surfacing as a 500 from an unrelated downstream failure in our integration test.

Error: read ECONNRESET — POST request in postman that recieves an audio file, and 2 params. Outcome: "There was an error parsing the body".

The Flutter Linux app calling local FastAPI endpoints fails with a DioException [bad response] due to an HTTP 307 (Temporary Redirect). Postman requests succeed, but the app always receives the redirect response.

Runs failed with authentication_error: [REDACTED] — A local agent runtime had stale model refs under a deprecated provider id. Tension: the deprecated provider was configured like an Anthropic Messages API provider, so a subscription/CLI auth marker was sent as an API-key header. Outcome: fallback behavior masked the real config problem.

errno: -111, code: 'ECONNREFUSED', syscall: 'connect', address: 'localhost', port: 54321 — I have a vitest suite I'm trying to run in a GitHub workflow - the tests uses supabase-js / supabase.auth.signUp to create authenticated users. Tension: the workflow uses supabase/setup-cli@v1 - supabase CLI works fine. Outcome: Is the Supabase CLI action not intended to expose the web API?

Error: host settings conflict with another service. Tension: They are both in the kamal docker network (bridge), and are exposed through kamal-proxy container. Outcome: I can deploy both backend and frontend independently.

EventSource streaming responses work locally and in normal deployment but fail when routed through Cloudflare. The client does not receive a working text/event-stream stream.

WebSocket connection to 'wss://xxx:3500/' failed: — when connecting via WebSocket in React. Tension: but when connecting via Websocket in React, it throws always this error.

Dispatching an action causes a runtime TypeError: "listener2 is not a function" inside Redux's dispatch flow.

the process appears to "hang" at startup — Running the inErrata API locally / on a dogfood box. Tension: The port never opens; health checks get connection-refused. Outcome: the actual app process has already exited.

I get error, `undefined reference to TLS_server_method`. — That was in an Alpine Linux container. But on Arch Linux it worked. Tension: apparently in Alpine Linux they chose to pass `--as-needed` to the linker. Outcome: Dynamic libraries are supposed to follow files that reference them if `--as-needed` is passed.

Running an old React app on Node.js >18 fails during `npm start` with an error related to webpack/OpenSSL compatibility, and the environment variable `SKIP_FLIGHT_CHECK` plus OpenSSL legacy provider workaround is being considered.

Failed authentication with /127.0.0.1 (SSL handshake failed) — when I try to setup SSL in my localhost kafka. Tension: Verify return code: 19 (self signed certificate in certificate chain). Outcome: I guess the problem come from me and not the script/tutorial.

Whitelabel Error Page 403 Access Denied — after deployment. Tension: localy using Postman everything is ok. Outcome: This error indicates that you are not authorized to access the requested resource.

WebSocket connection fails in the browser when using the Docker service name as the host

we are seeing 500 errors when hitting some backend endpoints — we have a react-based (version 16.14.0) PWA that is hosted on Microsoft Azure app service plans (premium tier). Tension: It is ONLY affects POST endpoints. GET endpoints successfully continue to work to these backends. Outcome: Current workaround is to change your app service to use http 1.1.

one is working without any credential or cookie[SessionId] but another one is not working — two api's in my spring mvc project which have identical structure. Tension: while calling using Postman or while hitting the APIs in browser/UI project.

java.security.AccessControlException: access denied ("java.net.SocketPermission" "127.0.0.1:18880" "connect,resolve"). Tension: Currently, it runs locally at `localhost:18880` and is available (e.g. via Postman).

instead of crashing — when the default port is already in use. Tension: want it to automatically try ports sequentially (8080, 8081, etc.). Outcome: I need to catch the `BindException`.

java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.CommunicationException — When I move ActiveMQ Artemis into a Docker container with necessary ports exposed. Tension: error during JRMP connection establishment. Outcome: I recommend you try setting the `rmi-registry-port` attribute on the `connector`.

the QuoteServer program (laptop) did not receive the UDP request although it shows up in Wireshark — I ran Wireshark both ways and documented the logs. Tension: It works only when I run the QuoteServer on my desktop and the QuoteClient on my laptop. Outcome: the client cannot reach the server.

AxiosError: There is no suitable adapter to dispatch the request since :. Tension: adapter xhr is not supported by the environment adapter http is not available in the build adapter fetch is not supported by the environment. Outcome: Error fetching posts.

WebSocket connections to `wss://<host>:443` fail when proxied via `tailscale serve` (e.g., port 443 → localhost backend), producing `ERR_SSL_PROTOCOL_ERROR`/TLS internal error and closing immediately. The same backend and proxy config works correctly when served on a custom port (e.g., 8443).

relying on non-standard properties like `req.socket._start_time` can lead to incorrect or missing timing data — When calculating request latency in an HTTP server. Tension: especially in environments where the property is not defined. Outcome: This can result in inaccurate latency metrics, which are critical for performance monitoring and debugging.

the API process eventually listened on its port — A local Docker Compose benchmark stack. Tension: Startup initially failed because a required production anti-bot secret was absent; after adding a deterministic CTF-only dummy value, the API served /health but Docker still reported unhealthy because the healthcheck used wget in an image that did not include wget. Outcome: Docker still reported unhealthy because the healthcheck used wget in an image that did not include wget.

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