https://ripanhalder.com/blog/ Practical backend engineering notes on Java, Spring Boot, Kafka, databases, AWS and system design. en-IN Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/modernizing-java-services-without-freezing-delivery/ https://ripanhalder.com/blog/modernizing-java-services-without-freezing-delivery/ How to sequence Java, Spring Boot, Gradle, dependency, artifact and cloud migrations while teams continue shipping. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/java-memory-model-visibility/ https://ripanhalder.com/blog/java-memory-model-visibility/ A practical mental model for volatile, synchronized, final fields and happens-before relationships in concurrent Java code. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/class-loading-metaspace-leaks/ https://ripanhalder.com/blog/class-loading-metaspace-leaks/ What class metadata is, how class loaders define reachability and why application reloads can leak metaspace. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/thread-pools-backpressure-java/ https://ripanhalder.com/blog/thread-pools-backpressure-java/ How pool size, queue policy and downstream capacity determine whether concurrency improves throughput or amplifies failure. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/bigdecimal-money-java/ https://ripanhalder.com/blog/bigdecimal-money-java/ Why binary floating point is unsafe for money and how to model rounding, scale and comparison explicitly. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/spring-transaction-boundaries/ https://ripanhalder.com/blog/spring-transaction-boundaries/ How @Transactional proxies, propagation, isolation and exception behavior shape real service consistency. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/jpa-n-plus-one-fetching/ https://ripanhalder.com/blog/jpa-n-plus-one-fetching/ How lazy loading, joins, entity graphs and projections affect query count, memory and API latency. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/spring-boot-configuration-secrets/ https://ripanhalder.com/blog/spring-boot-configuration-secrets/ A layered configuration strategy for defaults, environment overrides, validation and secret delivery. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/resilience-timeouts-retries-circuit-breakers/ https://ripanhalder.com/blog/resilience-timeouts-retries-circuit-breakers/ How to combine time budgets, backoff, idempotency and circuit breaking around remote dependencies. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/spring-boot-observability/ https://ripanhalder.com/blog/spring-boot-observability/ A practical telemetry model for correlation, RED metrics, business signals and production diagnosis. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/kafka-throughput-partitions-backpressure/ https://ripanhalder.com/blog/kafka-throughput-partitions-backpressure/ How partitions, consumer concurrency, processing latency and downstream capacity determine real event throughput. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/kafka-consumer-groups-rebalancing/ https://ripanhalder.com/blog/kafka-consumer-groups-rebalancing/ How partition assignment changes, why long processing causes churn and how cooperative strategies reduce disruption. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/delivery-semantics-idempotent-consumers/ https://ripanhalder.com/blog/delivery-semantics-idempotent-consumers/ Why duplicate delivery is normal and how deduplication, state transitions and database constraints create one durable outcome. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/kafka-retries-dead-letter-topics/ https://ripanhalder.com/blog/kafka-retries-dead-letter-topics/ A failure-handling design for transient errors, poison records, backoff, replay and operational ownership. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/schema-evolution-event-contracts/ https://ripanhalder.com/blog/schema-evolution-event-contracts/ Compatibility rules, additive change, semantic versioning and consumer-driven rollout for long-lived events. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/database-indexes-practical/ https://ripanhalder.com/blog/database-indexes-practical/ How B-tree indexes support filtering, joining and ordering—and why extra indexes also create write cost. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/transaction-isolation-locking/ https://ripanhalder.com/blog/transaction-isolation-locking/ Dirty reads, non-repeatable reads, phantoms, write skew and practical techniques for preserving invariants. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/postgres-explain-analyze/ https://ripanhalder.com/blog/postgres-explain-analyze/ How to interpret plan nodes, row estimates, loops, buffers and the difference between planner cost and elapsed time. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/redis-caching-consistency/ https://ripanhalder.com/blog/redis-caching-consistency/ Cache-aside, TTLs, invalidation, stampede protection and consistency trade-offs for backend systems. Mon, 13 Jul 2026 12:00:00 GMT https://ripanhalder.com/blog/ledger-data-model/ https://ripanhalder.com/blog/ledger-data-model/ Append-oriented entries, double-entry structure, immutable history and reconciliation-friendly balances. Mon, 13 Jul 2026 12:00:00 GMT