Investigate high CPU usage in Java applications with Arthas. Identify busy threads, inspect method call paths, and produce an evidence-based diagnosis with specific methods to examine next.
排查 JVM / 应用 CPU 飙高（线程定位 + 代码路径分析）
Review the instructions the agent will receive before you install.
适用场景：机器 CPU 飙高、应用响应变慢、负载异常升高。
原则：先用低风险工具定位「哪个线程在忙」，再逐步缩小到「哪个方法/代码路径」。
dashboard 查看 CPU/线程/GC 概况（建议设置有限次数）：
thread 找出最忙的前 N 个线程并打印堆栈：
topN=3 或 topN=5threadId 与堆栈关键方法名（可用 take_notes 记录证据）。判断方向：
java.util.regex、JSON 序列化、日志格式化等：可能是 CPU 密集计算。BLOCKED，并考虑用 thread(blocking=true) 找出阻塞源头线程。当热点线程堆栈指向某个「可疑方法」时：
stack / trace 针对该方法做路径确认（避免宽泛匹配）。watch 或 tt，并设置合理的执行次数与超时，避免对线上造成压力。报告至少包含：
No reviews yet. Tell others what you thought.
No login needed. Share how it worked for you, ask a question, or note where it did not run.
No comments yet. Be the first to write one.
Diagnose running Java applications with Arthas. Follow guides for high CPU usage, retrieving EagleEye request tracking IDs, and inspecting Spring configuration and managed objects, then summarize evidence and next steps.
Retrieve an EagleEye traceId, an identifier linking a request across logs, using Arthas without changing application code. Observe request-handling methods, capture parameters when needed, and inspect method calls and timings to investigate problems.
Investigate Spring configuration and Beans, the objects Spring manages, using Arthas. Check configuration sources, find registered objects by name or type, and inspect registration details while prioritizing read-only queries.