Troubleshooting Java, Second Edition

Part 4 Finding problems in large systems

So far, we’ve focused on diagnosing problems inside a single application. But in the real world, most systems are made up of many services, databases, and queues—all talking to each other across networks. In this environment, problems don’t just live in one place. They can hide in the gaps between services, in unexpected data mismatches, or in the way the system reacts as a whole under stress.

This part is about troubleshooting at system scale. We’ll learn how to uncover failures that happen only when services interact, how to measure and verify data consistency across boundaries, and how to trace multistep operations that cross multiple components. We’ll also look at strategies for catching drift ...