All Errors

MySQL only allows one primary key per table. This error occurs when you define multiple PRIMARY KEY constraints in a CREATE TABLE or ALTER TABLE statement. Remove duplicate primary key definitions or use a composite primary key instead.

This TypeScript error occurs when creating mapped types with incorrect syntax. Mapped types require the "in" keyword to iterate over union types, and this error appears when the type parameter is missing or malformed. The fix involves correcting the mapped type syntax to use proper "key in Type" pattern.

This TypeScript configuration error occurs when the "strict" compiler option is not enabled in tsconfig.json. Strict mode provides stronger type checking and helps catch potential runtime errors during compilation. Enabling it improves code quality and prevents common type-related bugs.

Redis logs `ERR fsync error` when its persistence thread cannot flush the AOF/RDB file, typically because the disk reports a write or fsync failure. The process pauses writes with `STOP-WRITES-ON-BGSAVE-ERROR` until you fix the underlying storage or OS settings, so gather the fsync logs, check disk health, and tune persistence settings. This guide covers the symptoms, root causes, and ordered steps needed to restore durable writes.

This error occurs when React Testing Library's text matching queries (getByText, findByText) fail because the actual text content in the DOM does not match the expected text pattern. It often happens due to whitespace differences, text split across elements, or asynchronous content updates.

This warning appears when testing React components with asynchronous state updates that aren't properly wrapped in React's act() utility. It indicates that your test isn't waiting for all React updates to complete before making assertions, which can lead to flaky tests or false positives. The warning commonly occurs when testing components with useEffect hooks, async data fetching, or user interactions that trigger state changes.

This error occurs when React Testing Library cannot locate an element containing the specified text in your rendered component. It's one of the most common testing failures and usually indicates issues with text matching, async rendering, or component state.

This error occurs when trying to run Prisma migrations on cloud databases like PlanetScale or Vitess that restrict direct schema changes on production branches. These platforms enforce a branch-based workflow where schema changes must be made on development branches and deployed through merge/deploy requests.

This TypeScript error occurs when the useSelector hook from React Redux returns inconsistent types across different execution paths. It often happens when using equality functions like shallowEqual or when selector functions have conditional return types. The error prevents proper type inference and can lead to runtime issues.

This error occurs when a non-owner or non-superuser attempts to modify, drop, or comment on a PostgreSQL extension. Most commonly encountered during database dumps/restores or Rails migrations, it requires either ownership privileges or superuser permissions to resolve.

DynamoDB returns InvalidExportTimeException when you try to export a table using an ExportTime that falls outside the point-in-time recovery (PITR) retention window. This error occurs with ExportTableToPointInTime API when the specified timestamp is either too old (beyond PITR retention) or in the future.

The Prisma P3017 error occurs when Prisma cannot locate a migration file that is referenced in the migration history. This typically happens when migration files are deleted, moved, or corrupted, preventing Prisma from applying or rolling back migrations. The fix involves restoring missing migration files or cleaning up the migration history.

This error occurs when Elasticsearch cannot compile a Painless script due to syntax errors, invalid tokens, or other compilation issues in your script code.

This error occurs when a PostgreSQL client disconnects abruptly without properly closing the connection, often due to network issues, timeout settings, or firewall interference. Fix it by configuring TCP keepalive settings, implementing connection pooling, and ensuring proper client-side connection handling.

This TypeScript error occurs when the compiler cannot find any source files matching the patterns specified in your tsconfig.json's 'include' or 'files' properties. The fix involves correcting file patterns, verifying file paths, or adjusting your TypeScript configuration to include the correct source files.

MongoDB has a 16MB limit for individual BSON documents. This error occurs when trying to insert or update a document that exceeds this size limit. Common causes include storing large binary data, deeply nested objects, or accumulating too much data in arrays.

DynamoDB returns GlobalTableNotFoundException when you attempt to perform operations on a global table that doesn't exist or isn't properly configured. This error occurs when referencing a global table name that hasn't been created, is still being replicated across regions, or has been deleted from the global tables configuration.

This error occurs when attempting to perform read operations on a MongoDB secondary replica set member without proper read preference configuration. By default, MongoDB restricts read operations to the primary node to ensure strict consistency.

This React error occurs when the first parameter passed to useImperativeHandle is not a valid ref object. Common causes include using string refs (deprecated), passing a function instead of a ref, not using forwardRef in React 18 and earlier, or ref initialization issues in React Native.

The useDeferredValue hook requires React 18+ with concurrent features enabled. This error occurs when trying to use useDeferredValue in React builds that don't include concurrent rendering capabilities, such as older React versions, production builds with concurrent features disabled, or development builds without experimental flags.