Logpoints Walkthrough - The JetBrains Blog

IntelliJ IDEA’s enhanced logpoints in version 2026.2 provide a non-suspending alternative to println logging and regular breakpoints, allowing developers to inspect and even temporarily alter a running Java application without rebuilding or redeploying it. Using a Dockerized gRPC server that incorrectly returns no discount for the JetBrains tenant, the walkthrough demonstrates attaching IntelliJ’s debugger remotely, adding logpoints dynamically, tracing the request flow, and identifying that the tenant name was not normalized before comparison. Logpoints avoid the timeout-related disruption caused by conventional breakpoints, which suspend gRPC server processing and can trigger request cancellation when client deadlines expire. The feature can also be used to test potential fixes and modify runtime values, such as extending deadlines only for tagged debugging requests, including within library dependencies. The walkthrough also highlights console-to-source navigation, cautions against expensive expressions in frequently executed paths, and describes an IntelliJ debugger AI agent skill that can help locate and modify relevant runtime behavior when developers lack familiarity with an underlying library.

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