Fix: Go Deadlock — all goroutines are asleep, deadlock!
How to fix Go channel deadlocks — unbuffered vs buffered channels, missing goroutines, select statements, closing channels, sync primitives, and detecting deadlocks with go race detector.
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Fix: Go Error Handling Not Working — errors.Is, errors.As, and Wrapping
How to fix Go error handling — errors.Is vs ==, errors.As for type extraction, fmt.Errorf %w for wrapping, sentinel errors, custom error types, and stack traces.
Fix: Go Panic Not Recovered — panic/recover Patterns and Common Pitfalls
How to handle Go panics correctly — recover() placement, goroutine panics, HTTP middleware recovery, defer ordering, distinguishing panics from errors, and when not to use recover.
Fix: GraphQL Error Handling Not Working — Errors Not Returned or Always 200 OK
How to fix GraphQL error handling — error extensions, partial data with errors, Apollo formatError, custom error classes, client-side error detection, and network vs GraphQL errors.
Fix: GraphQL Subscription Not Updating — WebSocket Connection Not Receiving Events
How to fix GraphQL subscriptions not receiving updates — WebSocket setup, subscription protocol, Apollo Client config, server-side pub/sub, authentication over WebSocket, and reconnection.
Fix: Jest Async Test Timeout — Exceeded 5000ms or Test Never Resolves
How to fix Jest async test timeouts — missing await, unresolved Promises, done callback misuse, global timeout configuration, fake timers, and async setup/teardown issues.
Fix: Jest Coverage Not Collected — Files Missing from Coverage Report
How to fix Jest coverage not collecting all files — collectCoverageFrom config, coverage thresholds, Istanbul ignore comments, ts-jest setup, and Babel transform issues.
Fix: Kotlin Coroutine Not Executing — launch{} or async{} Blocks Not Running
How to fix Kotlin coroutines not executing — CoroutineScope setup, dispatcher selection, structured concurrency, cancellation handling, blocking vs suspending calls, and exception propagation.
Fix: Kotlin Coroutine Scope Cancelled — JobCancellationException or Coroutine Not Running
How to fix Kotlin coroutine cancellation issues — scope lifecycle, SupervisorJob, CancellationException handling, structured concurrency, viewModelScope, and cooperative cancellation.
Fix: Laravel Queue Job Not Processing — Jobs Stuck in Queue
How to fix Laravel queue jobs not running — queue worker not started, wrong connection config, failed jobs, job timeouts, horizon setup, and database vs Redis queue differences.
Fix: MongoDB Schema Validation Error — Document Failed Validation
How to fix MongoDB schema validation errors — $jsonSchema rules, required fields, type mismatches, enum constraints, bypassing validation for migrations, and Mongoose schema conflicts.
Fix: MySQL Full-Text Search Not Working — MATCH AGAINST Returns No Results
How to fix MySQL full-text search issues — FULLTEXT index creation, minimum word length, stopwords, boolean mode vs natural language mode, InnoDB vs MyISAM, and LIKE fallback.