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Authorization at the template layer versus the controller layer Thymeleaf's sec:authorize attribute hides UI fragments based on Spring Security expressions, while @PreAuthorize on controller methods blocks unauthorized requests before any template executes. Both use SpEL syntax such as hasRole('ADMIN') , yet they operate at different stages of the request li
Declarative Retry and Transactional Boundaries In Spring Boot 3.x, combining @Retryable with @Transactional is often used to recover from transient failures. However, the ordering of these proxies determines whether a transaction is rolled back and restarted or if the retry occurs within the same existing transaction context. When a service method performs a
Context Spring Boot's spring.main.lazy-initialization=true property defers singleton bean creation until first use, reducing startup time and memory footprint for applications with infrequently accessed endpoints. For low-traffic workloads such as cron jobs, admin endpoints, or cold-start-sensitive serverless functions, this deferral can significantly cut re
I have recently tried my hands on Postgres. Installed it on local (PostgreSQL 13.0). Created a maven project and used Spring Data JPA, works just fine. Whereas when I tried using Gradle project, I am not able to connect to the DB and keep getting the following error. org.postgresql.util.PSQLException: The authentication type 10 is not supported. Check that y
A Spring Boot 3.x service using springdoc-openapi v2.x needs a single source of truth for the OpenAPI 3.1 specification that supports CI validation of breaking changes and reliable generation of typed TypeScript clients. The decision is between annotation-driven code-first generation from Spring MVC annotations with springdoc runtime output at /v3/api-docs,
The coordination gap Spring Boot 2.3 introduced graceful shutdown for every embedded server: with server.shutdown=graceful , Tomcat, Jetty, Undertow, and Netty stop accepting new requests while in-flight work runs until spring.lifecycle.timeout-per-shutdown-phase (default 30 seconds) expires. Migrating a small Spring Boot 3.2 service to this setting behind K
Goal: Run Kotlin Spring Boot integration tests that use an in‑memory database without accessing production credentials. Constraint: The application defines a production DataSource bean annotated with @Primary in src/main/java, while the test suite provides a @TestConfiguration DataSource bean in src/test/java that points to an H2 database. Uncertainty: When
Connection Pool Exhaustion Under Peak Load Spring Boot applications using HikariCP can experience intermittent connection pool exhaustion during peak traffic periods. The default maximumPoolSize of 10 connections may be insufficient when concurrent requests spike, causing the pool to deplete faster than connections are returned. During load testing, the appl
Connection Pool Exhaustion in JHipster Applications JHipster-generated Spring Boot applications rely on HikariCP for database connection pooling. Under high concurrency, the application may encounter a ConnectionTimeoutException when the number of active request threads exceeds the configured maximum-pool-size , causing threads to block until the connection-
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