TL;DR

The truncateForTelemetry function needs to be revised to ensure it produces valid JSON payloads by limiting object depth, array size, string length, and object key length, while safely handling getters and respecting .toJSON() methods.

Guidance

• Review the current truncateForTelemetry function to identify areas where it fails to guarantee valid JSON output, such as unbounded object traversal and blind string cutting.
• Implement a new truncation strategy that limits the maximum depth, maximum array size, string length (considering graphemes for Unicode support), and object key length to prevent Out-Of-Memory crashes and ensure JSON parseability.
• Use try/catch blocks to safely access properties via getters and respect .toJSON() methods if present to handle complex objects correctly.
• Enforce a global payload character limit as a final safety measure to prevent payloads from exceeding collector limits.

Example

No specific code example can be provided without the current implementation details of truncateForTelemetry, but a revised approach might involve recursive functions with depth limits and careful handling of object properties.

Notes

The solution must be tailored to the specific requirements and constraints of the telemetry system, including any character limits imposed by collectors. Testing with various payloads, including those with deep objects, large arrays, and Unicode characters, will be crucial to ensure the revised function meets all necessary criteria.

Recommendation

Apply a workaround by revising the truncateForTelemetry function according to the guidance provided, as there is no clear indication of an available fixed version that addresses these specific issues. This approach ensures that the telemetry data is always valid JSON and prevents potential crashes due to excessive memory usage.