# Jaeger v2.15.0 — Release v2.15.0

- Product: Jaeger (https://whatsnew.fyi/product/jaeger)
- Vendor: CNCF
- Date: 2026-02-06
- Version: v2.15.0
- Original notes: https://github.com/jaegertracing/jaeger/releases/tag/v2.15.0
- Permalink: https://whatsnew.fyi/product/jaeger/releases/v2.15.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **removed** — Restrict trace/metric storage configs to allow exactly one backend type
- **added** — Add Grafana dashboard for metrics exporter
- **fixed** — Return empty array instead of nil from api/v3/services
- **fixed** — Return empty array instead of nil from queryservice.getservices
- **fixed** — Always return empty services list when none exist
- **fixed** — Ensure badger maintenance is stopped before exiting close()
- **changed** — Use lazy initialization for storage factory
- **added** — Add materialized view for event attribute metadata in ClickHouse
- **changed** — Rework ClickHouse attributes to look up type for string attributes
- **added** — Add get_span_names tool for discovering span names in MCP
- **changed** — Use OpenTelemetry span_name terminology in jaegermcp extension
- **added** — Implement get_critical_path tool in MCP
- **added** — Add get_services tool for service discovery in MCP
- **added** — Add CORS setting and fix null array errors in MCP
- **added** — Add get_trace_topology tool in MCP
- **added** — Add get_span_details and get_trace_errors tools in MCP
- **added** — Add search_traces tool in MCP
- **added** — Add storage integration in MCP
- **added** — Add MCP server scaffolding with SDK integration and streamable HTTP transport

###### Backend Changes

###### ⛔ Breaking Changes

* Restrict trace/metric storage configs to allow exactly one backend type ([@yurishkuro](https://github.com/yurishkuro) in [#7875](https://github.com/jaegertracing/jaeger/pull/7875))

###### ✨ New Features

* Issue #7811: added grafana dashboard for metrics exporter ([@Anmol202005](https://github.com/Anmol202005) in [#7903](https://github.com/jaegertracing/jaeger/pull/7903))

###### 🐞 Bug fixes, Minor Improvements

* [fix] return empty array instead of nil from api/v3/services ([@dee077](https://github.com/dee077) in [#7926](https://github.com/jaegertracing/jaeger/pull/7926))
* [fix] return empty array instead of nil from queryservice.getservices ([@sujalshah-bit](https://github.com/sujalshah-bit) in [#7925](https://github.com/jaegertracing/jaeger/pull/7925))
* [fix] always return empty services list when none exist ([@Sudhanshu-NITR](https://github.com/Sudhanshu-NITR) in [#7929](https://github.com/jaegertracing/jaeger/pull/7929))
* [fix] ensure badger maintenance is stopped before existing close() ([@Yashika0724](https://github.com/Yashika0724) in [#7940](https://github.com/jaegertracing/jaeger/pull/7940))
* Use lazy initialization for storage factory ([@Copilot](https://github.com/apps/copilot-swe-agent) in [#7887](https://github.com/jaegertracing/jaeger/pull/7887))

###### 🚧 Experimental Features

* [clickhouse] add materialized view for event attribute metadata ([@mahadzaryab1](https://github.com/mahadzaryab1) in [#7923](https://github.com/jaegertracing/jaeger/pull/7923))
* [clickhouse] rework clickhouse attributes to look up type for string attributes ([@mahadzaryab1](https://github.com/mahadzaryab1) in [#7815](https://github.com/jaegertracing/jaeger/pull/7815))
* [mcp] add get_span_names tool for discovering span names ([@sajal004004](https://github.com/sajal004004) in [#7909](https://github.com/jaegertracing/jaeger/pull/7909))
* Use opentelemetry span_name terminology in jaegermcp extension ([@Copilot](https://github.com/apps/copilot-swe-agent) in [#7916](https://github.com/jaegertracing/jaeger/pull/7916))
* [mcp] implement get_critical_path tool (phase 3 steps 8-9) ([@Copilot](https://github.com/apps/copilot-swe-agent) in [#7857](https://github.com/jaegertracing/jaeger/pull/7857))
* [clickhouse][chore] update unit tests snapshots to handle multiple queries ([@mahadzaryab1](https://github.com/mahadzaryab1) in [#7865](https://github.com/jaegertracing/jaeger/pull/7865))
* [mcp] get_services tool for service discovery ([@Copilot](https://github.com/apps/copilot-swe-agent) in [#7864](https://github.com/jaegertracing/jaeger/pull/7864))
* [mcp] add cors setting and fix null array errors ([@yurishkuro](https://github.com/yurishkuro) in [#7863](https://github.com/jaegertracing/jaeger/pull/7863))
* [mcp] get_trace_topology tool (phase 3 step 7) ([@Copilot](https://github.com/apps/copilot-swe-agent) in [#7862](https://github.com/jaegertracing/jaeger/pull/7862))
* [mcp] phase 2 steps 5-6: get_span_details and get_trace_errors tools ([@Copilot](https://github.com/apps/copilot-swe-agent) in [#7859](https://github.com/jaegertracing/jaeger/pull/7859))
* [mcp] phase 2 step 4: search_traces ([@Copilot](https://github.com/apps/copilot-swe-agent) in [#7858](https://github.com/jaegertracing/jaeger/pull/7858))
* [clickhouse][chore] update test driver to handle multiple queries ([@mahadzaryab1](https://github.com/mahadzaryab1) in [#7839](https://github.com/jaegertracing/jaeger/pull/7839))
* [mcp] phase 2 step 3: storage integration ([@Copilot](https://github.com/apps/copilot-swe-agent) in [#7849](https://github.com/jaegertracing/jaeger/pull/7849))
* Mcp server/phase 1.2: sdk integration with streamable http transport ([@Copilot](https://github.com/apps/copilot-swe-agent) in [#7846](https://github.com/jaegertracing/jaeger/pull/7846))
* Mcp server scaffolding ([@Copilot](https://github.com/apps/copilot-swe-agent) in [#7842](https://github.com/jaegertracing/j

_[Truncated at 4000 characters — full notes: https://github.com/jaegertracing/jaeger/releases/tag/v2.15.0]_