opensearch-project/OpenSearch

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🔎 Open source distributed and RESTful search engine.

Stars: 13.7k
Forks: 3k
Open beginner issues: 7
Indexed issues: 2.5k
Avg merge: 2d 23h
Merged PRs (30d): 108

Dominant language: Java
License: Apache-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue help wanted hacktoberfest

Beginner friendly Everything

Open All

2,509 open issues indexed

[BUG] Missing required routing with generated IDs returns HTTP 500 instead of 400 Open

Indexing untriaged

Difficulty 3/5 1-2 days Newbie friendliness 75/100

opensearch-project/OpenSearch#23092 · Opened Sep 19, 2026
[Composite Engine] DataFormatAwareEngine.close() deadlocks with in-flight merges on index delete → wedges cluster applier Open

duplicate untriaged

Difficulty 5/5 Over a week Newbie friendliness 38/100

opensearch-project/OpenSearch#23085 · 1 comment · Opened Sep 18, 2026
[Feature Request] Support configuring universe_domain in repository-gcs for Google Cloud trusted cloud environments Open

enhancement Plugins untriaged

Difficulty 3/5 1-2 days Newbie friendliness 72/100

opensearch-project/OpenSearch#23083 · Opened Sep 18, 2026
[BUG] Tracing: TraceableTcpTransportChannel adds a close listener per inbound request, leaking spans on long-lived transport channels Open

Other Telemetry:Tracing

Difficulty 4/5 3-5 days Newbie friendliness 48/100

opensearch-project/OpenSearch#23070 · 2 comments · Opened Sep 17, 2026
[RFC] Tiered remote-store recovery: serve reads through block fetches while hydrating Open

discuss enhancement Storage:Remote untriaged

Difficulty 5/5 Over a week Newbie friendliness 25/100

opensearch-project/OpenSearch#23066 · Opened Sep 17, 2026
[BUG] Direct buffer OOM on many-core nodes: CopyBytesSocketChannel pins 1MB per IO thread Open

bug Other untriaged

Difficulty 4/5 3-5 days Newbie friendliness 64/100

opensearch-project/OpenSearch#23064 · 1 comment · Opened Sep 17, 2026
[BUG][Sandbox] Distributed sort+head on multi_value keyword intermittently returns an empty LIST for a fetched document Open

bug untriaged

Difficulty 3/5 1-2 days Newbie friendliness 76/100

opensearch-project/OpenSearch#23061 · Opened Sep 17, 2026
[BUG][Sandbox] dc() over a multi_value keyword fails: approx_distinct not implemented for List Open

bug untriaged

Difficulty 3/5 1-2 days Newbie friendliness 68/100

opensearch-project/OpenSearch#23059 · Opened Sep 17, 2026
[BUG][Sandbox] list()/values() aggregates reject multi_value keyword input as ARRAY Open

bug untriaged

Difficulty 3/5 1-2 days Newbie friendliness 76/100

opensearch-project/OpenSearch#23058 · Opened Sep 17, 2026
[META] Sorted doc values for keyword and ip fields on pluggable data format indices Open

Meta Search:Aggregations untriaged

Difficulty 5/5 Over a week Newbie friendliness 28/100

opensearch-project/OpenSearch#23056 · 1 reaction · Opened Sep 17, 2026
[Feature Request] Include filter's `_name` in the `_explanation.details` Open

enhancement missing-component

Difficulty 4/5 3-5 days Newbie friendliness 48/100

opensearch-project/OpenSearch#23046 · 2 comments · Opened Sep 16, 2026
[BUG] Broadcast join silently returns zero rows when the probe fragment also has a delegated predicate Open

bug Plugins untriaged

Difficulty 3/5 1-2 days Newbie friendliness 76/100

opensearch-project/OpenSearch#23045 · Opened Sep 16, 2026
[Feature Request][MPP] Join runtime filters for the analytics engine Open

enhancement Search:Performance

Difficulty 5/5 Over a week Newbie friendliness 32/100

opensearch-project/OpenSearch#23044 · Opened Sep 16, 2026
[DISCUSS] Fix analytics-engine & SQL plugin integration Open

analytics-engine discuss

Difficulty 5/5 Over a week Newbie friendliness 25/100

opensearch-project/OpenSearch#23030 · 6 comments · Opened Sep 14, 2026
Introduce a registry-based extension point for cluster-state-dependent setting validations Open

Cluster Manager enhancement untriaged

opensearch-project/OpenSearch#23026 · 1 assignee · Opened Sep 13, 2026
[BUG] Erratic slow search across nodes possibly due to Netty thread stalls Open

bug Search:Resiliency

Difficulty 5/5 Over a week Newbie friendliness 28/100

opensearch-project/OpenSearch#23018 · 3 comments · Opened Sep 11, 2026
[BUG] Searchable snapshot read path degrades bulk reads (readFloats/readInts/readLongs) into element-wise reads Open

Search:Searchable Snapshots

Difficulty 3/5 1-2 days Newbie friendliness 78/100

opensearch-project/OpenSearch#23012 · Opened Sep 11, 2026
[BUG] Unsupported boost/_name on optional should clauses is silently accepted Open

bug Search

Difficulty 4/5 3-5 days Newbie friendliness 72/100

opensearch-project/OpenSearch#23011 · Opened Sep 11, 2026
[Feature Request][Sandbox][MPP] Pipelined hash shuffle, with a materialized shape chosen per worker stage Open

enhancement Search:Resiliency

Difficulty 5/5 Over a week Newbie friendliness 35/100

opensearch-project/OpenSearch#22995 · Opened Sep 10, 2026
[BUG] Aggregations on wildcard fields return incorrect results Open

bug missing-component untriaged

Difficulty 4/5 3-5 days Newbie friendliness 58/100

opensearch-project/OpenSearch#22992 · 3 comments · Opened Sep 9, 2026
[Feature] AsyncBalance: guarded asynchronous routing computation for high-shard-cardinality clusters Open

untriaged

Difficulty 5/5 Over a week Newbie friendliness 25/100

opensearch-project/OpenSearch#22978 · 2 comments · Opened Sep 7, 2026
[BUG] Remote Cluster State: data-node restart can trigger a non-converging election loop at high cardinality Open

untriaged

Difficulty 5/5 Over a week Newbie friendliness 25/100

opensearch-project/OpenSearch#22977 · Opened Sep 7, 2026
[Remote State] Make data-node restart routing work change-aware at high shard cardinality Open

untriaged

Difficulty 5/5 Over a week Newbie friendliness 25/100

opensearch-project/OpenSearch#22976 · Opened Sep 7, 2026
[Remote State] Bound pre-publication persistence with term-scoped deadlines and cancellation Open

untriaged

Difficulty 5/5 Over a week Newbie friendliness 28/100

opensearch-project/OpenSearch#22975 · Opened Sep 7, 2026
[Remote State] Establish a reproducible high-cardinality RCS publication and restart benchmark Open

untriaged

Difficulty 5/5 Over a week Newbie friendliness 32/100

opensearch-project/OpenSearch#22974 · Opened Sep 7, 2026
[BUG] Document cluster.routing.allocation.rebalance.primary.enable in segment replication docs Open

bug missing-component untriaged

Difficulty 1/5 Under an hour Newbie friendliness 88/100

opensearch-project/OpenSearch#22973 · 3 comments · Opened Sep 7, 2026
[Feature Request] Unify boost and _name rejection policy across DSL query translators Open

enhancement missing-component untriaged

Difficulty 4/5 3-5 days Newbie friendliness 48/100

opensearch-project/OpenSearch#22961 · 3 comments · Opened Sep 5, 2026
[BUG] Mutable Parquet VSR rejects fields during schema visibility lag Open

bug Indexing untriaged

opensearch-project/OpenSearch#22955 · 1 assignee · Opened Sep 4, 2026
[BUG] Composite writers compare different mapping version counters Open

bug Indexing lucene

opensearch-project/OpenSearch#22954 · 1 comment · 1 assignee · Opened Sep 4, 2026
[BUG] Throttled simulated relocations can trigger outbound relocation from an underweight node Open

bug Cluster Manager missing-component untriaged

opensearch-project/OpenSearch#22949 · 1 comment · 1 assignee · Opened Sep 4, 2026
[Sandbox] Warm-tier metadata promotion can be silently dropped while warmup reports success Open

bug missing-component untriaged

Difficulty 4/5 3-5 days Newbie friendliness 55/100

opensearch-project/OpenSearch#22946 · 2 comments · Opened Sep 4, 2026
[BUG] Hash-shuffle join fails the whole query when one join side has no rows Open

bug Search:Query Capabilities

Difficulty 4/5 3-5 days Newbie friendliness 65/100

opensearch-project/OpenSearch#22941 · Opened Sep 4, 2026
[Feature Request] Add a setting to block split-target shards from being marked STARTED until the post-split housekeeping merge completes Open

enhancement Indexing lucene untriaged

opensearch-project/OpenSearch#22936 · 1 comment · 1 assignee · Opened Sep 3, 2026
Delegate DSL index resolution to the Analytics Core plugin Open

untriaged

Difficulty 5/5 Over a week Newbie friendliness 35/100

opensearch-project/OpenSearch#22934 · Opened Sep 3, 2026
[BUG] WLM auto-tagging fails a search with "value for key [workloadGroupId] already present" Open

bug Search:Workload Management untriaged

Difficulty 3/5 1-2 days Newbie friendliness 78/100

opensearch-project/OpenSearch#22927 · Opened Sep 2, 2026
Support per-query target_partitions override in analytics PPL/SQL (pluggable data format) Open

enhancement good first issue Search

Difficulty 4/5 3-5 days Newbie friendliness 58/100

opensearch-project/OpenSearch#22919 · 2 comments · Opened Sep 2, 2026
[DOCS] Add getting-started guide for pluggable data format (sandbox) Open

documentation enhancement good first issue

Difficulty 3/5 1-2 days Newbie friendliness 78/100

opensearch-project/OpenSearch#22918 · Opened Sep 2, 2026
[Sandbox]`gradlew run` does not verify native Rust library is up-to-date with source Open

Build enhancement good first issue

Difficulty 4/5 3-5 days Newbie friendliness 55/100

opensearch-project/OpenSearch#22917 · 1 comment · Opened Sep 2, 2026
[BUG] A blocked analytics stream read cannot be interrupted: no deadline, and cancellation never reaches the stream Open

bug lucene Search:Resiliency

Difficulty 5/5 Over a week Newbie friendliness 35/100

opensearch-project/OpenSearch#22913 · Opened Sep 2, 2026
[BUG] Node-wide deadlock: pinned virtual threads block on Netty allocator locks and starve every carrier Open

bug lucene Search:Resiliency

Difficulty 5/5 Over a week Newbie friendliness 35/100

opensearch-project/OpenSearch#22912 · Opened Sep 2, 2026
AI policy for OpenSearch? Open

enhancement missing-component untriaged

Difficulty 5/5 Over a week Newbie friendliness 25/100

opensearch-project/OpenSearch#22897 · 3 comments · 2 reactions · Opened Aug 31, 2026
[BUG] disable_objects set via dynamic template fails on first document with nested objects Open

bug Indexing untriaged

Difficulty 3/5 1-2 days Newbie friendliness 72/100

opensearch-project/OpenSearch#22892 · Opened Aug 31, 2026
[Feature Request] Validate available disk space before accepting an offline _split request Open

enhancement Indexing untriaged

Difficulty 5/5 Over a week Newbie friendliness 35/100

opensearch-project/OpenSearch#22889 · Opened Aug 31, 2026
[BUG] term query on a derived field defined in the search request returns partial results non-deterministically Open

Search

Difficulty 4/5 3-5 days Newbie friendliness 52/100

opensearch-project/OpenSearch#22882 · 1 comment · Opened Aug 30, 2026
[BUG] Shared InnerHitSubContext corrupts `_source` reads under concurrent segment search Open

bug Search:Aggregations

Difficulty 4/5 3-5 days Newbie friendliness 42/100

opensearch-project/OpenSearch#22868 · 1 comment · Opened Aug 27, 2026
[META] Retriever Framework Implementation Open

Meta untriaged

Difficulty 5/5 Over a week Newbie friendliness 35/100

opensearch-project/OpenSearch#22862 · Opened Aug 26, 2026
[Retriever Framework] Implement the RankDocsQuery Open

enhancement Search

Difficulty 4/5 3-5 days Newbie friendliness 42/100

opensearch-project/OpenSearch#22861 · 1 comment · Opened Aug 26, 2026
[RFC] A Variant blob column for `flat_object` Open

discuss enhancement Search:Performance

Difficulty 5/5 Over a week Newbie friendliness 30/100

opensearch-project/OpenSearch#22860 · 5 comments · Opened Aug 26, 2026
[RFC] Pluggable storage formats for the analytics engine Open

enhancement Search:Query Capabilities

Difficulty 5/5 Over a week Newbie friendliness 25/100

opensearch-project/OpenSearch#22843 · Opened Aug 26, 2026
[RFC] Make shard balance aware of allocation filters Open

enhancement ShardManagement:Placement untriaged

Difficulty 4/5 3-5 days Newbie friendliness 56/100

opensearch-project/OpenSearch#22832 · 3 comments · Opened Aug 25, 2026

opensearch-project/OpenSearch

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