Dev Tools · 1h ago
Debugging a Legacy Java App's Connection Pool Nightmare
A developer recounts battling a legacy Java app, Jerry, that failed under load due to a shared JDBC library without connection timeouts and a tiny HikariCP pool. Tuning the pool and fixing zombie threads only masked deeper issues, with performance problems recurring weeks later. The story highlights the challenges of maintaining aging enterprise software under growing demands.
Meridian48 take
A cautionary tale that underscores how quick fixes on legacy systems often just delay the inevitable need for a proper rewrite.
legacy-softwareconnection-pooling