This guide covers real-world diagnosis and resolution of Java thread deadlocks and thread pool exhaustion — the two most common causes of service hangs with zero errors — using jstack, Arthas, and thread-state analysis to pinpoint root causes and apply permanent fixes.
This article explains how ANRCanary attributes Android ANR problems by analyzing thread deadlocks, barrier message leaks, aggregation signatures, and key‑function extraction, providing developers with concrete detection algorithms and practical examples to resolve high‑impact ANRs.
After the user center’s test environment repeatedly halted all database requests, we traced the issue to Druid’s connection pool threads blocking on takeLast(), discovered opentelemetry’s global lock causing deadlock, and resolved it by upgrading Druid and adjusting maxWait settings.
This article details the design and deployment of JD Mall's mobile app stutter monitoring system, introducing the stutter rate metric, describing data collection, analysis, and reporting modules, presenting iOS and Android implementation code, and summarizing the performance improvements achieved across the platform.
