Spring Data Spring Data Packt — .pdf Checked !full!

If you already possess a PDF and want to perform your own verification, use this checklist derived from the keyword :

| Pitfall | Solution | |---------|----------| | LazyInitializationException in web controllers | Use @Transactional in service layer, not repo | | Massive memory use from findAll() | Use pagination or Stream<T> + @Query | | Slow derived query on large tables | Add database index; use @Query with EXPLAIN plan | | Auditing fails for createdBy | Provide AuditorAware bean (e.g., from SecurityContextHolder ) | spring data spring data packt .pdf checked