Error map
EMFILE Too many open files (EMFILE)
Linux · layer 6, Platform & cloud
Centre: this error. First ring: errors it is linked with (12). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.
Directly related (12)
Error: socket hang up / read ECONNRESET
The other side closed the TCP connection abruptly while your client was still using it.
Error: ENOENT: no such file or directory
A file or directory the program tried to open doesn’t exist at that path.
Cloudflare Error 1025: Please check back later (Workers request limit)
The site’s Cloudflare Workers plan exceeded its daily request limit (free plan: 100,000 requests/day).
MySQL ERROR 1040 (08004): Too many connections
MySQL reached `max_connections` and refuses new clients.
Lambda: Request must be smaller than 6291456 bytes for the InvokeFunction operation (RequestEntityTooLargeException)
The event payload (or response) is over Lambda’s 6 MB synchronous limit (256 KB for async invocations).
Cloudflare Error 1102: Worker exceeded resource limits (CPU time / memory)
The Worker used more CPU time or memory than its plan allows for a single request.
Cloudflare 413 Request Entity Too Large (upload over the plan limit)
The request body is larger than Cloudflare allows through the proxy — 100 MB on Free/Pro, 200 MB Business, 500 MB Enterprise defa…
Lambda: Unzipped size must be smaller than 262144000 bytes
The function code plus layers exceed Lambda’s 250 MB unzipped limit for zip deployments.
fork: retry: Resource temporarily unavailable (process/thread limit)
The user or container hit its maximum number of processes/threads (ulimit -u, pids cgroup), so new processes can’t be created.
GraphQL: Query is too complex / exceeds maximum operation depth / complexity limit
The server rejected the query because it’s too deep or too expensive according to its depth/complexity limits.
LLM API: This model's maximum context length is x tokens. However, your messages resulted in y tokens (context_length_exceeded / prompt is too long)
The prompt plus requested output exceed the model’s context window.
gRPC Error: 8 RESOURCE_EXHAUSTED: Received message larger than max (x vs. 4194304)
A gRPC message exceeded the receiver’s maximum size (4 MB default).
Two steps away (35)
Error: connect ECONNREFUSED 127.0.0.1:5432
Nothing is listening at that host:port — the target service is down or you’re connecting to the wrong address.
HTTP 502 Bad Gateway
A proxy or gateway (Nginx, load balancer, CDN) got an invalid response — or no response — from the upstream server behind it.
fatal: unable to access 'https://github.com/…': Could not resolve host: github.com
DNS lookup for the Git host failed from this machine.
Error: Cannot find module 'x' (MODULE_NOT_FOUND)
Node can’t resolve the module path — the package isn’t installed, or a relative path/extension is wrong.
bash: command not found
The shell can’t find an executable with that name in any directory on your PATH.
Windows Error 0x80070002: The system cannot find the file specified
A file or registry entry Windows expected is missing — common in Windows Update, backups and app installs.
Cloudflare Error 1015: You are being rate limited
The site’s Cloudflare rate-limiting rule blocked you for sending too many requests in a short time.
Cloudflare Error 1019: Compute server error (Workers)
A Cloudflare Worker routed the request to a loop or hit an internal compute error.
Cloudflare Error 1101: Worker threw exception
The Cloudflare Worker serving this route threw an uncaught JavaScript exception.
MySQL ERROR 2002 (HY000): Can't connect to local MySQL server through socket
The client couldn’t reach the MySQL server — it isn’t running, or the client is looking for the socket/port in the wrong place.
WordPress: Error Establishing a Database Connection
WordPress can’t connect to its MySQL/MariaDB database with the credentials in wp-config.php, or the database server is down.
Lock wait timeout exceeded; try restarting transaction (MySQL 1205)
A query waited too long for a row lock held by another transaction and gave up.
HTTP 413 Content Too Large (Request Entity Too Large)
The request body is bigger than the server is willing to accept — usually a file upload over the configured limit.
AWS Lambda: Task timed out after X seconds
The function ran longer than its configured timeout (default 3 seconds) and Lambda stopped it.
Runtime.ImportModuleError: Unable to import module 'lambda_function': No module named 'x'
Lambda couldn’t load your handler file or one of its dependencies — the package is missing from the deployment zip/layer or the h…
Cloudflare Error 1104: A variation of this script was not found (Worker route to deleted script)
A Worker route points to a script that no longer exists (deleted, renamed or not deployed to that environment).
wrangler / Cloudflare API: Authentication error [code: 10000]
The Cloudflare API rejected the token — it’s invalid, expired, missing permissions, or scoped to another account/zone.
WordPress: The link you followed has expired
Usually an upload (theme, plugin, media) larger than PHP’s upload/post limits — WordPress receives an empty request and shows thi…
Upload error: File type not allowed / unsupported file type
The upload was rejected because the file’s type — extension, MIME type or actual content — isn’t on the allowed list.
Upload error: File too large (LIMIT_FILE_SIZE / file exceeds maximum upload size)
The uploaded file is larger than the limit set by the API, framework or server.
Runtime.HandlerNotFound: index.handler is undefined or not exported
Lambda loaded the file but couldn’t find the function named in the handler setting.
Lambda: Runtime exited with error: signal: killed (Runtime.ExitError)
The function process was killed — almost always because it ran out of its configured memory.
InvalidParameterValueException: The role defined for the function cannot be assumed by Lambda
The execution role’s trust policy doesn’t allow lambda.amazonaws.com — or the role was just created and IAM hasn’t propagated yet.
Error: listen EADDRINUSE: address already in use :::3000
Another process is already listening on that port.
Error: write EPIPE
Node wrote to a pipe or socket whose other end was already closed.
RangeError [ERR_CHILD_PROCESS_STDIO_MAXBUFFER]: stdout maxBuffer length exceeded
child_process.exec/execSync produced more output than its buffer allows (default 1 MB).
HTTP 429 Too Many Requests
You’ve hit a rate limit — too many requests in a given time window. Slow down and retry later.
GraphQL: Cannot query field "x" on type "Y"
The query asks for a field that doesn’t exist in the server’s schema (or isn’t available on that type).
API Error: limit must be less than or equal to 100 (page size exceeds maximum)
You asked for more items per page than the endpoint allows.
HTTP 400 Bad Request
The server could not understand the request because its syntax, headers or body are malformed or invalid.
LLM API: You exceeded your current quota, please check your plan and billing details (insufficient_quota / credit balance is too low)
The account has no remaining credits or reached its spending limit, so requests are rejected (often as 429).
LLM API: The model `x` does not exist or you do not have access to it (model_not_found / not_found_error)
The model name is wrong, deprecated/retired, or not available to your account/region.
gRPC Error: 14 UNAVAILABLE: No connection established / failed to connect to all addresses
The gRPC client couldn’t reach the server — wrong address/port, TLS vs plaintext mismatch, server down, or a proxy that doesn’t s…
gRPC Error: 4 DEADLINE_EXCEEDED: Deadline exceeded
The call didn’t complete before the client’s deadline — slow server, network issues, or a deadline that’s too short.
gRPC Error: 12 UNIMPLEMENTED: unknown service x / Method not found
The server doesn’t have the service or method the client called — proto mismatch, wrong package name, or calling the wrong server.
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