<![CDATA[Stories by Nithidol Vacharotayan on Medium]]> https://medium.com/@nithidol?source=rss-7a4acdec7a4f------2 https://cdn-images-1.medium.com/fit/c/150/150/1*TvG2aQswF2GXMHO9RjvS1g.png Stories by Nithidol Vacharotayan on Medium https://medium.com/@nithidol?source=rss-7a4acdec7a4f------2 Medium Thu, 05 Nov 2026 06:11:05 GMT <![CDATA[Our Redis Lock Expired. The Report Job Kept Running.]]>

Two Spring Boot pods processed the same report, exposing the gap between acquiring a lease and controlling work after it expires.

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]]> https://blog.devgenius.io/our-redis-lock-expired-the-report-job-kept-running-da74e06d263e?source=rss-7a4acdec7a4f------2 https://medium.com/p/da74e06d263e Tue, 06 Oct 2026 10:17:45 GMT 2026-10-06T12:51:33.595Z <![CDATA[When a CSV Download Controls Your PostgreSQL Transaction]]>

A proposed Spring Boot reproduction examines how streaming can reduce heap usage while tying database resource lifetimes to a slow client.

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]]> https://blog.devgenius.io/when-a-csv-download-controls-your-postgresql-transaction-2b4dc308fb88?source=rss-7a4acdec7a4f------2 https://medium.com/p/2b4dc308fb88 Tue, 29 Sep 2026 16:29:04 GMT 2026-10-03T13:17:49.072Z <![CDATA[Spring Boot Saved the Order. Kafka Never Received the Event.]]>

How a PostgreSQL–Kafka dual write created two versions of success — and why a transactional outbox made the failure recoverable.

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]]> https://blog.stackademic.com/spring-boot-saved-the-order-kafka-never-received-the-event-a9663b4cfa31?source=rss-7a4acdec7a4f------2 https://medium.com/p/a9663b4cfa31 Thu, 24 Sep 2026 16:14:52 GMT 2026-09-29T13:39:07.389Z <![CDATA[Our Load Test Passed Because It Never Triggered Retries]]>

How a Spring Boot search API multiplied 300 customer requests into nearly 900 downstream calls — and exposed a missing failure mode in our…

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]]> https://blog.stackademic.com/our-load-test-passed-because-it-never-triggered-retries-4f7f0993b2ba?source=rss-7a4acdec7a4f------2 https://medium.com/p/4f7f0993b2ba Tue, 15 Sep 2026 16:50:30 GMT 2026-09-16T14:30:16.464Z <![CDATA[The 20 MB File That Changed Our Spring Boot API]]>

Embedding file content in JSON turned a modest upload into unpredictable heap pressure — and showed us that content type is also a…

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]]> https://blog.stackademic.com/the-20-mb-file-that-changed-our-spring-boot-api-81e9eda57a66?source=rss-7a4acdec7a4f------2 https://medium.com/p/81e9eda57a66 Tue, 08 Sep 2026 16:59:55 GMT 2026-09-09T00:42:18.870Z <![CDATA[PostgreSQL Used the Index. The Query Still Read 8.7 Million Rows.]]>

Why an Index Scan gave us false confidence—and how earlier filtering reduced the work before an expensive reporting join.

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]]> https://blog.stackademic.com/postgresql-used-the-index-the-query-still-read-8-7-million-rows-a619e9d4497e?source=rss-7a4acdec7a4f------2 https://medium.com/p/a619e9d4497e Wed, 02 Sep 2026 07:05:14 GMT 2026-09-03T11:45:38.471Z <![CDATA[Our Server Was Healthy. Our Connection Pool Was Exhausted.]]>

How Oracle connection occupancy made a responsive Spring Boot service unusable — and why the fix required both query efficiency and…

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]]> https://blog.stackademic.com/our-server-was-healthy-our-connection-pool-was-exhausted-d1db610a224f?source=rss-7a4acdec7a4f------2 https://medium.com/p/d1db610a224f Wed, 26 Aug 2026 09:42:02 GMT 2026-08-26T09:42:02.483Z <![CDATA[PostgreSQL Was Fast. Our Spring Boot API Still Ran Out of Memory!]]>

How an unpaginated Hibernate object graph turned a report preview into a full-report workload inside one HTTP request.

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]]> https://blog.stackademic.com/postgresql-was-fast-our-spring-boot-api-still-ran-out-of-memory-555292277fc6?source=rss-7a4acdec7a4f------2 https://medium.com/p/555292277fc6 Thu, 20 Aug 2026 03:35:44 GMT 2026-08-21T06:38:37.292Z <![CDATA[Quartz Ran Successfully. The Report Was Still Wrong.]]>

An implicit server timezone shifted both a Spring Boot job and the database window it was supposed to report.

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]]> https://blog.stackademic.com/quartz-ran-successfully-the-report-was-still-wrong-5a6b630b2aef?source=rss-7a4acdec7a4f------2 https://medium.com/p/5a6b630b2aef Wed, 12 Aug 2026 08:00:55 GMT 2026-08-15T17:30:29.007Z <![CDATA[Why Our Spring Boot Health Check Lied During an Outage]]>

Every pod remained ready while all 200 checkout threads waited on the same dependency.

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]]> https://blog.stackademic.com/why-our-spring-boot-health-check-lied-during-an-outage-74d053a51ffa?source=rss-7a4acdec7a4f------2 https://medium.com/p/74d053a51ffa Wed, 05 Aug 2026 03:25:56 GMT 2026-08-07T07:54:25.944Z