Fix: Spring Boot @Cacheable Not Working — Cache Miss Every Time or Stale Data
How to fix Spring Boot @Cacheable issues — @EnableCaching missing, self-invocation bypass, key generation, TTL configuration, cache eviction, and Caffeine vs Redis setup.
Tag: spring-boot
11 articles
RSSFix: Spring Data JPA Query Not Working — @Query, Derived Methods, and N+1 Problems
How to fix Spring Data JPA query issues — JPQL vs native SQL, derived method naming, @Modifying for updates, pagination, projections, and LazyInitializationException.
Fix: Spring Boot @Transactional Not Rolling Back — Transaction Committed Despite Exception
How to fix Spring @Transactional not rolling back — checked vs unchecked exceptions, self-invocation proxy bypass, rollbackFor, transaction propagation, and nested transactions.
Fix: Hibernate LazyInitializationException — Could Not Initialize Proxy
How to fix Hibernate LazyInitializationException — loading lazy associations outside an active session, fetch join, @Transactional scope, DTO projection, and Open Session in View.
Fix: Spring Boot Failed to Configure a DataSource
How to fix 'Failed to configure a DataSource: url attribute is not specified' in Spring Boot — adding database properties, excluding DataSource auto-configuration, H2 vs production DB setup, and multi-datasource configuration.
Fix: Spring Boot "The dependencies of some of the beans in the application context form a cycle"
How to fix Spring Boot circular dependency errors — BeanCurrentlyInCreationException, refactoring to break cycles, @Lazy injection, setter injection, and @PostConstruct patterns.
Fix: Spring Security Returning 403 Forbidden Unexpectedly
How to fix Spring Security 403 Forbidden errors — CSRF token missing, incorrect security configuration, method security blocking requests, and how to debug the Spring Security filter chain.
Fix: Spring Boot Failed to Configure DataSource (DataSource Auto-Configuration Error)
How to fix Spring Boot 'Failed to configure a DataSource' errors — missing URL property, driver class not found, connection refused, and how to correctly configure datasource properties for MySQL, PostgreSQL, and H2.
Fix: Spring BeanCreationException: Error creating bean with name
How to fix Spring BeanCreationException error creating bean caused by missing dependencies, circular references, wrong annotations, configuration errors, and constructor issues.
Fix: Spring Boot Web server failed to start. Port 8080 was already in use
How to fix the Spring Boot error 'Web server failed to start. Port 8080 was already in use' by killing blocking processes, changing ports, fixing IDE issues, and resolving Docker conflicts.
Fix: Spring Boot Whitelabel Error Page - This application has no explicit mapping
How to fix the Spring Boot Whitelabel Error Page caused by missing controller mappings, wrong component scan, wrong package structure, and missing Thymeleaf templates.