E38388e383a9e38396e383abe382b7e383a5e383bce38386e382a3e383b3e382b0 Articles
2 articles about E38388e383a9e38396e383abe382b7e383a5e383bce38386e382a3e383b3e382b0. Explore Spring Boot implementation, design, and operations across related topics.
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How to Fix LazyInitializationException in Spring Boot + JPA - Causes and Solutions for "could not initialize proxy - no Session"
Solve the LazyInitializationException (could not initialize proxy - no Session) that crashes the moment you access a lazily-loaded association in Spring Data JPA, working backwards from how Hibernate sessions and transaction boundaries operate. Compares the four proper approaches—JOIN FETCH, @EntityGraph, DTO projection, and @Transactional—and provides criteria for making decisions without resorting to open-in-view=true or switching to EAGER.
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Troubleshooting Guide for Spring Boot Application Startup Failures
For those panicking over 'APPLICATION FAILED TO START'. Based on Spring Boot 3.x, this guide reverse-looks-up 7 typical patterns from symptoms, including port conflicts, Bean duplication, circular references, missing DataSource configuration, and profile mistakes. It also covers how to read FailureAnalyzer messages and use the --debug flag with practical examples.