Dynamic Debugging Framework for Multitenant Application Servers
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Solution Overview
Problem
Existing debugging mechanisms in application server environments require server restarts, which can be costly and time-consuming, and may not capture information effectively for intermittent issues, especially in production environments where downtime is not feasible.
Innovation Solution
A system and method for dynamic debugging that allows the activation and deactivation of debug patches without server restarts, using a debug framework with a debug patch directory and leveraging JDK hot-swap instrumentation to replace classes dynamically, enabling the collection of diagnostic information without disrupting server operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional debugging mechanisms are used, then debugging can be performed, but server restarts are required which causes downtime and loss of productivity
Solution Approach 1:
The patent implements dynamic debugging by allowing debug patches to be activated and deactivated at runtime without server restarts. The debugging framework enables dynamic loading of instrumented classes that can be applied to running managed servers, transforming the static debugging process into a dynamic one that maintains server availability.
Solution Approach 2:
The patent prepares debug patches in advance within a debug patch directory, allowing them to be instantly activated when needed. The instrumented classes are pre-computed and stored, so when a debug patch is activated, the instrumentation is already prepared and can be applied immediately without requiring server restarts.
2Loss of information
If server restarts are performed for debugging, then debugging information can be gathered, but time is lost and diagnostic information for intermittent issues may not be captured
Solution Approach 1:
The patent enables continuous debugging operation by allowing the server to remain running while debug patches are activated. The instrumentation runs continuously against the running application, capturing diagnostic information for intermittent issues without the disruption of restarts. This maintains continuous monitoring and information gathering capability.
3Productivity
If debug patches are activated without server restarts, then productivity is maintained, but complex class replacement mechanisms are required
Solution Approach 1:
The patent introduces a debugging framework as an intermediary layer between the application server and the debug patches. This framework manages the complexity of class replacement by providing standardized interfaces for patch activation, class instrumentation, and information gathering. The framework handles the complex interactions between multiple managed servers and classes in a systematic manner.
Solution Approach 2:
The patent segments the debugging functionality into separate modular components: a debug patch directory for storing instrumented classes, a debugging framework for managing activation, and targeted class replacement mechanisms. This segmentation allows each component to be independently developed, tested, and maintained, reducing overall system complexity.
Data Source
AI summary
In accordance with an embodiment, described herein is a system and method for dynamic debugging in an application server environment. An exemplary method can provide, at one or more computers, including an application server environment executing thereon, a plurality of deployable resources which can be used within the application server environment, one or more running managed servers, the one or more managed servers being within a domain, and a debug framework, the debug framework comprising a debug patch directory, the debug patch directory containing one or more debug patches. The method can activate a selected debug patch within the domain, the selected debug patch comprising at least one class, the selected debug patch designed to gather information about the problem within the domain. The managed servers, upon activation of the selected debug patch, can remain running. The method can also deactivate the selected debug patch without requiring a restart.