All Errors
4963 error solutions available - Page 110 of 249
Node.jsBEGINNERMEDIUM
How to fix "Error initializing cipher" in Node.js
This error occurs when Node.js crypto module attempts to initialize a cipher with an invalid or unsupported algorithm name. The cipher name must match one of the algorithms supported by the OpenSSL library that Node.js is compiled with. Using an incorrect cipher specification like "aes-999-cbc" instead of valid options like "aes-256-cbc" will trigger this initialization error.
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Error: Error initializing cipher 'aes-999-cbc' (in...Node.jsBEGINNERMEDIUM
HTTP status code out of valid range
This RangeError occurs when you try to set an HTTP response status code that falls outside the valid range of 100-599. Node.js strictly validates status codes to ensure compliance with HTTP specifications.
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RangeError: The value of 'statusCode' is out of ra...Node.jsINTERMEDIATEMEDIUM
How to fix "Command killed with signal SIGTERM" in Node.js
This error occurs when a child process spawned by Node.js is terminated by receiving a SIGTERM signal before completing its task. SIGTERM is a termination signal sent by the operating system, container orchestrator, or parent process to request graceful shutdown. Understanding why the process receives SIGTERM and implementing proper signal handling prevents unexpected terminations and data loss.
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Error: Command killed with signal SIGTERM (process...Node.jsINTERMEDIATEHIGH
Socket is not connected - write before establishing connection
This error occurs when attempting to write data to a Node.js net.Socket before the connection is established. The socket must successfully connect to a remote server before any data can be sent. This typically happens when write() is called immediately without waiting for the "connect" event.
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Error: Socket is not connected (socket must connec...Node.jsINTERMEDIATEMEDIUM
Asynchronous iterator returned a null reference
This error occurs when an async iterator's next() method returns null instead of a proper iterator result object. Async iterators must return promises that resolve to objects with done and value properties.
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TypeError: Asynchronous iterator returned a null r...Node.jsINTERMEDIATEMEDIUM
Command failed with exit code 1 (child process failed)
This error occurs when a child process spawned by Node.js exits with a non-zero status code, indicating the command or script failed to execute successfully. Exit code 1 typically signals a general error condition in the child process.
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Error: Command failed with exit code 1 (child proc...Node.jsINTERMEDIATEHIGH
Certificate verify failed: self signed certificate
This error occurs when Node.js attempts to make an HTTPS request but cannot verify the SSL/TLS certificate because it is self-signed or issued by an untrusted Certificate Authority. This is common in corporate networks, development environments, or when connecting to private registries.
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Error: certificate verify failed: self signed cert...Node.jsBEGINNERHIGH
Cannot find module (require/import failed)
This error occurs when Node.js cannot locate a module you are trying to import or require. It typically happens when a package is not installed, the path is incorrect, or dependencies are corrupted.
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Error: Cannot find module 'express'Node.jsINTERMEDIATEMEDIUM
How to fix "maxBuffer exceeded" in Node.js child_process
The maxBuffer exceeded error occurs when a child process produces more output than the buffer can hold. The default buffer size is 1MB, and when stdout or stderr data exceeds this limit, Node.js terminates the child process and throws an error. This commonly happens when executing commands that produce large amounts of output.
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Error: stdout maxBuffer exceededNode.jsINTERMEDIATEHIGH
RangeError: offset is out of bounds
This error occurs when attempting to read from or write to a Buffer at an invalid position that exceeds the buffer's allocated memory boundaries.
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RangeError: offset is out of bounds (buffer index ...Node.jsINTERMEDIATEHIGH
Callback was already called
This error occurs when a callback function is invoked more than once in an asynchronous operation, typically when using callback-based flow control libraries like async.js. It is a safety mechanism to prevent unpredictable behavior caused by multiple callback invocations.
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Error: Callback was already called.Node.jsADVANCEDHIGH
Backpressure: queue size exceeded (async operations piling up)
This error occurs when async operations are being queued faster than they can be processed, causing unbounded memory growth and eventual system failure. It's a classic backpressure problem where producers outpace consumers.
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Error: Backpressure: queue size exceeded (async op...Node.jsBEGINNERMEDIUM
SyntaxError: await is only valid in async function
This error occurs when the await keyword is used outside of an async function context. JavaScript requires await to be inside async functions, async generators, or ES module top-level code to properly handle asynchronous operations.
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SyntaxError: await is only valid in async functionNode.jsINTERMEDIATEHIGH
Backpressure detected - stream buffer full
This error occurs when data is being written to a Node.js stream faster than it can be consumed, causing the internal buffer to fill up. The stream is experiencing backpressure because the destination cannot drain data quickly enough to keep up with the source.
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Error: Backpressure detected - stream buffer full ...Node.jsINTERMEDIATEHIGH
How to fix "HTTP 502 Bad Gateway" in Node.js
A 502 Bad Gateway error occurs when a reverse proxy server (like nginx or a load balancer) receives an invalid or no response from your Node.js application. This typically happens when your app crashes, times out, or fails to respond properly to incoming requests. Fixing this requires identifying why the upstream Node.js server is failing to respond.
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Error: HTTP 502 Bad Gateway (upstream server error...ReactBEGINNERMEDIUM
Booleans are not valid as React children
This error occurs when you attempt to render a boolean value directly as a child in your React component. While React technically allows booleans in the JSX tree, rendering them directly or using incorrect conditional patterns can cause warnings and unexpected behavior.
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Booleans are not valid as React childrenNode.jsBEGINNERMEDIUM
AssertionError: Assertion failed in assert.strictEqual
This error occurs when a test assertion fails using Node.js assert.strictEqual(), indicating that the actual value does not match the expected value using strict equality (===).
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AssertionError: Assertion failed (assert.strictEqu...Node.jsINTERMEDIATEMEDIUM
The operation was aborted
This error occurs when an asynchronous operation is cancelled using an AbortController before it completes. It commonly happens with fetch requests, file operations, or any API that accepts an AbortSignal when the operation is explicitly aborted or times out.
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AbortError: The operation was aborted (abort signa...Node.jsINTERMEDIATEHIGH
TLS alert: bad certificate (peer rejected certificate)
The remote server rejected the SSL/TLS certificate presented by your Node.js application during the handshake. This occurs when the certificate is invalid, self-signed, or the certificate chain is incomplete.
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Error: tlsv1 alert bad certificate (peer rejected ...ReactBEGINNERMEDIUM
Image missing required "alt" property
Next.js requires all Image components to include an alt attribute for accessibility compliance. This error occurs when you use the next/image component without providing the alt prop, preventing proper screen reader support and accessibility standards.
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Image with src="%s" was missing required "alt" pro...