28.6.2. Diagnostic Tools

Try these first

1. 1.

   What is the primary purpose of jconsole?

   Hint

   Think about its functionalities.

2. 2.

   What kind of data can jstat provide?

   Hint

   Consider what aspects of performance need monitoring.

3. 3.

   What tool would you use to gather thread stack traces?

   • jconsole
   • jvisualvm
   • jstack

   Hint

   Consider which tool focuses on threads specifically.

4. 4.

   True or False: jvisualvm can only monitor local Java applications.

   • True
   • False

   Hint

   Think about the capabilities of jvisualvm.

5. 5.

   You are experiencing frequent application crashes due to thread contention. How would you leverage jstack and jvisualvm to diagnose and resolve the issue?

   Hint

   Think about both the immediate thread state and the overall system performance.

6. 6.

   You suspect there's a memory leak in your application. Describe how you would identify it using jvisualvm and explain how to utilize the captured data.

   Hint

   Focus on the memory allocation patterns and object lifespan.