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Profiling Spring Boot Applications with VisualVM
Profiling Spring Boot Applications with VisualVM

Profiling Spring Boot Applications with VisualVM

Author
Shiv Bade
Tags
spring boot
profiling
visualvm
Published
January 30, 2015
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I was debugging a high CPU usage issue in one of our Spring Boot services. Turned out to be an accidental infinite loop triggered by malformed input.
To catch it, I used VisualVM: 1. Start your Spring Boot app with remote debug flags:
java -Dcom.sun.management.jmxremote -jar myservice.jar
  1. Connect via VisualVM and inspect CPU sampling
  1. Sort by method usage, identify hotspots
Console output:
Method           | Time   | Invocations
loopProcessor()  | 97.2%  | 2,193,840
Lesson: Always watch for unbounded iterations, especially when processing user input.