opensearch-project/data-prepper
Nov 2024 – Jul 2025
4 Months active
Languages Used
JavaYAMLGradle
Technical Skills
Backpressure HandlingConfiguration ManagementError HandlingJavaOpenTelemetrygRPC
Karsten Schnitter
PROFILE
Karsten Schnitter
Kevin Schnitter contributed to the opensearch-project/data-prepper repository by engineering backend enhancements focused on observability, data integrity, and security. He improved OpenTelemetry span indexing reliability by incorporating traceId into document identifiers, preventing data collisions in distributed tracing. Addressing backpressure and error handling, he implemented exponential backoff and RetryInfo propagation for gRPC responses, reducing data loss under load. Kevin stabilized metrics indexing by refining Elasticsearch mappings, ensuring accurate attribute searches. He also upgraded dependencies such as Armeria and Protobuf to address security vulnerabilities, aligning build configurations and updating tests. His work utilized Java, Gradle, and YAML, demonstrating depth in distributed systems.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
4Total
Bugs
2
Commits
4
Features
2
Lines of code
1,180
Activity Months4
Your Network
638 people
Work History
July 2025
1 Commits • 1 Features
Jul 1, 20252025-07 Monthly Summary for opensearch-project/data-prepper: Implemented security-focused dependency upgrades and test updates to ensure stability and security. Upgraded Armeria, gRPC, and Protobuf to address CVE-2024-7254, and enforced consistent JUnit versions across the project. Updated tests to accommodate dependency changes and maintain compatibility, using patched library versions to improve security and maintainability.
1 Commits • 1 Features
Jul 1, 20252025-07 Monthly Summary for opensearch-project/data-prepper: Implemented security-focused dependency upgrades and test updates to ensure stability and security. Upgraded Armeria, gRPC, and Protobuf to address CVE-2024-7254, and enforced consistent JUnit versions across the project. Updated tests to accommodate dependency changes and maintain compatibility, using patched library versions to improve security and maintainability.
July 2025
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 (opensearch-project/data-prepper): Implemented OpenTelemetry Span Indexing Reliability by incorporating traceId into the documentId used for spans, preventing collisions and ensuring unique identification. This change includes an integration test that validates spans with identical spanIds but different traceIds are not overwritten, strengthening data integrity for distributed tracing.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 (opensearch-project/data-prepper): Implemented OpenTelemetry Span Indexing Reliability by incorporating traceId into the documentId used for spans, preventing collisions and ensuring unique identification. This change includes an integration test that validates spans with identical spanIds but different traceIds are not overwritten, strengthening data integrity for distributed tracing.
May 2025
1 Commits
May 1, 2025Month: 2025-05. Delivered targeted data-prepper enhancements to stabilize OpenTelemetry metrics indexing and improve data quality for metric observability. Reverted a global default field mapping change that caused broad indexing side effects and introduced explicit keyword mappings for string fields in the OpenTelemetry metrics index template to ensure string attributes are correctly indexed for metrics. This work strengthens metric searchability, accuracy, and downstream analytics in the OpenSearch-powered observability stack.
1 Commits
May 1, 2025Month: 2025-05. Delivered targeted data-prepper enhancements to stabilize OpenTelemetry metrics indexing and improve data quality for metric observability. Reverted a global default field mapping change that caused broad indexing side effects and introduced explicit keyword mappings for string fields in the OpenTelemetry metrics index template to ensure string attributes are correctly indexed for metrics. This work strengthens metric searchability, accuracy, and downstream analytics in the OpenSearch-powered observability stack.
May 2025
November 2024
1 Commits
Nov 1, 2024Month 2024-11 monthly summary for opensearch-project/data-prepper: OpenTelemetry timeout retry backpressure handling bug fix delivered to enhance resilience and data integrity. Implemented exponential backoff retry information for RESOURCE_EXHAUSTED gRPC responses and propagated RetryInfo on OTel timeouts to prevent message drops during backpressure and improve observability. This work reduces data-loss risk, improves throughput under load, and strengthens system resilience.
November 2024
1 Commits
Nov 1, 2024Month 2024-11 monthly summary for opensearch-project/data-prepper: OpenTelemetry timeout retry backpressure handling bug fix delivered to enhance resilience and data integrity. Implemented exponential backoff retry information for RESOURCE_EXHAUSTED gRPC responses and propagated RetryInfo on OTel timeouts to prevent message drops during backpressure and improve observability. This work reduces data-loss risk, improves throughput under load, and strengthens system resilience.
Activity
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Quality Metrics
Correctness90.0%
Maintainability90.0%
Architecture90.0%
Performance75.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
GradleJavaYAML
Technical Skills
Backend DevelopmentBackpressure HandlingBuild ConfigurationConfiguration ManagementData EngineeringDependency ManagementDistributed SystemsElasticsearchError HandlingIntegration TestingJavaObservabilityOpenTelemetrySecurity PatchingTesting
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