# Jaeger v2.20.0 — Release v2.20.0

- Product: Jaeger (https://whatsnew.fyi/product/jaeger)
- Vendor: CNCF
- Date: 2026-07-20
- Version: v2.20.0
- Original notes: https://github.com/jaegertracing/jaeger/releases/tag/v2.20.0
- Permalink: https://whatsnew.fyi/product/jaeger/releases/v2.20.0

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** — Remove support for Elasticsearch v6
- **changed** — Promote es.* rotation and index-cleaner feature gates to beta
- **changed** — Merge jaegermcp extension into jaegerquery extension
- **changed** — Add configurable max_trace_duration and improve time-range design for Elasticsearch
- **added** — Add --backend flag to esmapping-generator for OpenSearch selection
- **added** — Add native trace summaries (summaryreader) for Elasticsearch
- **added** — Add synchronous bulk write primitive to the Elasticsearch client
- **added** — Gate parentspanid reference-compat write behind a feature gate
- **added** — Add genai span attributes and gateway↔sidecar trace propagation
- **changed** — Remove expired stable feature gates
- **changed** — Migrate template creation to esclient and retire legacy mapping rendering
- **fixed** — Reject mutually-exclusive Elasticsearch auth methods in validate()
- **changed** — Make "spm not configured" error message more explicit
- **changed** — Migrate span writes onto an owned bounded bulk indexer
- **fixed** — Synchronize fallback token in tokenproviderwithtime closure
- **changed** — Migrate service/operation reads onto owned searcher and query ast
- **added** — Add bearer-token and api-key CLI flags to Elasticsearch admin tools
- **changed** — Route admin plane through the shared auth stack
- **fixed** — Validate decoded trace/span id lengths to prevent panic on corrupted rows in ClickHouse
- **fixed** — Apply custom_headers to all Elasticsearch clients and honor host override

###### Backend Changes

###### ⛔ Breaking Changes

* Feat(es): promote es.* rotation and index-cleaner feature gates to beta ([@ysh-bot](https://github.com/ysh-bot) in [#9018](https://github.com/jaegertracing/jaeger/pull/9018))
* Feat(es): remove support for elasticsearch v6 ([@yurishkuro](https://github.com/yurishkuro) in [#8948](https://github.com/jaegertracing/jaeger/pull/8948))
* Feat(mcp): merge jaegermcp extension into jaegerquery extension ([@Nabil-Salah](https://github.com/Nabil-Salah) in [#8894](https://github.com/jaegertracing/jaeger/pull/8894))
* Feat(es): add configurable max_trace_duration and improve time-range design ([@yurishkuro](https://github.com/yurishkuro) in [#8840](https://github.com/jaegertracing/jaeger/pull/8840))

###### ✨ New Features

* Feat(es): add --backend flag to esmapping-generator for opensearch selection ([@ysh-bot](https://github.com/ysh-bot) in [#8985](https://github.com/jaegertracing/jaeger/pull/8985))
* Feat(es): native trace summaries (summaryreader) ([@Me-Priyank](https://github.com/Me-Priyank) in [#8812](https://github.com/jaegertracing/jaeger/pull/8812))

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

* Feat(es): add synchronous bulk write primitive to the elasticsearch client ([@ysh-bot](https://github.com/ysh-bot) in [#8992](https://github.com/jaegertracing/jaeger/pull/8992))
* Feat(es): gate parentspanid reference-compat write behind a feature gate ([@ysh-bot](https://github.com/ysh-bot) in [#9015](https://github.com/jaegertracing/jaeger/pull/9015))
* Fix(ci): resolve published snapshot shas for oke demo deploy ([@FlamingSaint](https://github.com/FlamingSaint) in [#8999](https://github.com/jaegertracing/jaeger/pull/8999))
* feat(jaegerai): add genai span attributes and gateway↔sidecar trace propagation ([@SoumyaRaikwar](https://github.com/SoumyaRaikwar) in [#8942](https://github.com/jaegertracing/jaeger/pull/8942))
* Chore(storage): remove expired stable feature gates ([@Anujkumar9081](https://github.com/Anujkumar9081) in [#8970](https://github.com/jaegertracing/jaeger/pull/8970))
* Chore(es): scrub lingering olivere references from code comments ([@ysh-bot](https://github.com/ysh-bot) in [#8983](https://github.com/jaegertracing/jaeger/pull/8983))
* Feat(es): migrate template creation to esclient and retire legacy mapping rendering ([@Me-Priyank](https://github.com/Me-Priyank) in [#8963](https://github.com/jaegertracing/jaeger/pull/8963))
* Fix(storage): reject mutually-exclusive es auth methods in validate() ([@Anujkumar9081](https://github.com/Anujkumar9081) in [#8946](https://github.com/jaegertracing/jaeger/pull/8946))
* Make "spm not configured" error message more explicit ([@Saithej2k](https://github.com/Saithej2k) in [#8878](https://github.com/jaegertracing/jaeger/pull/8878))
* Feat(es): migrate span writes onto an owned bounded bulk indexer ([@yurishkuro](https://github.com/yurishkuro) in [#8944](https://github.com/jaegertracing/jaeger/pull/8944))
* Fix(auth): synchronize fallback token in tokenproviderwithtime closure ([@yurishkuro](https://github.com/yurishkuro) in [#8952](https://github.com/jaegertracing/jaeger/pull/8952))
* Feat(es): migrate service/operation reads onto owned searcher and query ast ([@yurishkuro](https://github.com/yurishkuro) in [#8943](https://github.com/jaegertracing/jaeger/pull/8943))
* [es] add bearer-token and api-key cli flags to es admin tools (rfc 0006 m3.5c) ([@yurishkuro](https://github.com/yurishkuro) in [#8939](https://github.com/jaegertracing/jaeger/pull/8939))
* [es] route admin plane through the shared auth stack (rfc 0006 m3.5b) ([@yurishkuro](https://github.com/yurishkuro) in [#8937](https://github.com/jaegertracing/jaeger/pull/8937))
* Fix(clickhouse): validate decoded trace/span id lengths to prevent panic on corrupted rows ([@iammdzaidalam](https://github.com/iammdzaidalam) in [#8935](https://github.com/jaegertracing/jaeger/pull/8935))
* Fix(es): apply custom_headers to all elasticsearch clients and honor ho

_[Truncated at 4000 characters — full notes: https://github.com/jaegertracing/jaeger/releases/tag/v2.20.0]_