Troubleshooting Java

4 Debugging apps remotely

This chapter covers

• Debugging an app installed in a remote environment
• Upskilling debugging techniques with a hands-on example

One of my friends recently had a problem where a particular part of the software he was implementing was very slow. Generally, when we have these types of performance issues, we suspect that an I/O interface is the cause (e.g., a connection to a database or reading or writing in a file). Remember from chapter 1 that such interfaces often slow down apps, so they are a likely suspect. But in my friend’s case, interfaces were not the issue.

The performance issue was caused by the simple generation of a random value (a universally unique identifier [UUID] stored in the database). The operating ...