[FIXED] How to monitor Threads in AWS

Issue

Is there an easy, built-in way to monitor threads of an Java app in AWS? Like thread count, running time, etc. Or do I need a profiling tool?

Can I see thread metrics in AWS X-RAY or is there a way to export JVM metrics to cloudwatch?

Solution

There is no totally built-in metric for that, but using the CloudWatch PutMetricData API it's possible to monitor anything. Some folks did that for JMX: https://github.com/mojn/jmx-cloudwatch-reporter

For Tomcat, for example, it would be

Thread Usage
JMX Bean: Catalina:type=Executor,name=[executor name]

Attributes: poolSize, activeCount

https://wiki.apache.org/tomcat/FAQ/Monitoring

X-Ray is for realtime application monitoring, with different instrumentation alternatives.

Answered By - Julio Faerman
Answer Checked By - Gilberto Lyons (JavaFixing Admin)