Serverless applications are distributed applications and debugging distributed applications is different to debugging single-server or monolithic applications. Specifically, you must consider:

• Debugging across multiple services, since most production serverless applications use a combination of Lambda functions and other services.
• Debugging concurrent invocations of functions, as many workloads use parallelization to process increases in traffic.
• Understanding the state of a workload when the error occurred so you can reliably reproduce the issue.

Topics

• Standardizing a debugging approach
• Troubleshooting payloads
• Troubleshooting integration errors
• Troubleshooting Lambda configurations
• Troubleshooting queue processing by Lambda functions
• Best practices for your debugging environment

This chapter covers:

• Standardizing a debugging approach from the error occurring through to remediating the problem.
• Troubleshooting invocations – identifying common causes, symptoms, and remediation strategies.
• Best practices for configuring your Lambda build and development environment for debugging functions.