apache/druid

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Apache Druid: a high performance real-time analytics database.

Stars: 14.1k
Forks: 3.8k
Open beginner issues: 0
Indexed issues: 649
Avg merge: 2d 58m
Merged PRs (30d): 233

Dominant language: Java
License: Apache-2.0
Last GitHub push: Sep 12, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Open All

648 open issues indexed

Ingestion task fails with NullPointerException during BUILD_SEGMENTS phase Open

Area - Batch Ingestion Bug

apache/druid#8835 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Stale comments in compaction logic Open

Bug

apache/druid#8839 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
VersionedIntervalTimeline performance corner case with high number of overlapping segments Open

Area - Segment Balancing/Coordination Discuss Performance

apache/druid#8846 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Overlapping segments combined with load rules can lead to data loss Open

Bug

apache/druid#8853 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
web console: display index_parallel progress Open

Area - Web Console Feature/Change Description

apache/druid#8856 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
NPE while executing org.apache.druid.indexing.kafka.supervisor.KafkaSupervisorTest.testLatestOffset() Open

Area - Streaming Ingestion Improvement

apache/druid#8867 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Get rid of instance-level ThreadLocal in ConcurrentGrouper Open

Contributions Welcome Refactoring

apache/druid#8884 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
IncrementalIndex's `in` ThreadLocal doesn't need to be instance-level Open

Contributions Welcome Improvement Starter

apache/druid#8886 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Make Transformer single-threaded and get rid of `rowSupplierForValueMatcher` ThreadLocal Open

Contributions Welcome Refactoring

apache/druid#8887 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Make IntelliJ's inspection "ThreadLocal field not declared static final" a error Open

Area - Automation/Static Analysis Contributions Welcome

apache/druid#8888 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Fix double-checked locking in predicate suppliers in BoundDimFilter, InDimFilter, SelectorDimFilter Open

Area - Querying Bug Contributions Welcome

apache/druid#8911 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Reconcile comment/documentation spelling to "datasource" rather than "data source" Open

Area - Documentation

apache/druid#8917 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Failed to build docker image: npm ci failed Open

Area - Dev Development Blocker

apache/druid#8920 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
ArrayIndexOutOfBoundsException on historical in class GroupByMergingQueryRunnerV2 when grouping on high-cardinality dimension Open

Bug

apache/druid#8922 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
HTML NPE in sampler if dimensionsSpecs is not set Open

Area - Batch Ingestion Bug

apache/druid#8934 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
ensure chill URI escaping is done in all the places Open

Bug Refactoring

apache/druid#8941 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Unnecessary cartesian explosion if multi-value column is reused in expression Open

Area - Querying Bug

apache/druid#8947 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Calcite is too aggressive in simplifying a having filter on multi-value dimensions Open

Area - Querying Bug

apache/druid#8958 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Sampler should be able to accept type == index_parallel Open

Area - Batch Ingestion Area - Web Console Feature/Change Description Starter

apache/druid#8979 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
GroupBy query gives different response when changing columns in the limitSpec. Open

Bug

apache/druid#9000 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
HAVING in sql semijoins cannot see aggregated field Open

Area - SQL Uncategorized problem report

apache/druid#9018 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
coordinator not loading historical data Open

Area - Web Console Bug

apache/druid#9041 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Make 'Unguarded field access' inspection in IntelliJ an error Open

Area - Automation/Static Analysis

apache/druid#9103 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
"assumeGrouped" behaves differently in native batch and hadoop tasks Open

Area - Batch Ingestion Bug

apache/druid#9168 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Docker-compose.yml broken after de-incubation cleanup Open

Apache

apache/druid#9169 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Druid Basic Security - Allow dynamic update of escalated client credentials Open

Feature/Change Description Security

apache/druid#9174 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[DISCUSS] Unit tests for JSON-serializable objects Open

Area - Testing Discuss

apache/druid#9180 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Proper handling for RIGHT OUTER and FULL OUTER joins Open

Area - Querying

apache/druid#9229 · 0 comments · 4 reactions · 0 assignees · Indexed Sep 14, 2026
Add concurrent access and control flow documentation to Announcer and NodeAnnouncer Open

Area - ZooKeeper/Curator Improvement

apache/druid#9244 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
The coordinator doesn't clean up the pendingSegments table for a datasource if there is no published segments in the datasource Open

Bug

apache/druid#9245 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Incorrect null handling for long columns in predicate matching filters Open

Area - Null Handling Bug

apache/druid#9255 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Improve test coverage of DataSourceOptimizer Open

Area - Testing Improvement

apache/druid#9257 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
FileRequestLogger is prone to clock drift Open

Area - Operations Bug Contributions Welcome

apache/druid#9284 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Dangling CountDownLatch.await() in tests Open

Area - Automation/Static Analysis Area - Testing Bug Contributions Welcome Starter

apache/druid#9285 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add support for optional cloud (aws, gcs, etc.) credentials for s3 for ingestion Open

Design Review Proposal

apache/druid#9305 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Performance degradation in topN queries when SQL-compatible null handling is enabled Open

Area - Querying Bug Performance

apache/druid#9321 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Update Avro dep and remove SomeAvroDatum from forbidden-apis exclusion Open

Area - Dependencies

apache/druid#9331 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Proposal] Pubsub Indexing Service Open

Area - Streaming Ingestion Design Review Proposal

apache/druid#9343 · 5 comments · 7 reactions · 0 assignees · Indexed Sep 14, 2026
Querying for a Kafka topic that does not exist via the sampler returns an HTML error (JSON error is expected) Open

Area - Streaming Ingestion Bug

apache/druid#9347 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Adding CredentialsProvider, deprecating PasswordProvider Open

Design Review Proposal

apache/druid#9351 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
URI lookups should support HTTP Open

Area - Lookups Feature/Change Description Starter

apache/druid#9377 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Fine grained config and state resources Open

Design Review Proposal Security

apache/druid#9380 · 26 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Bound filter sorting direction Open

Design Review Proposal

apache/druid#9382 · 0 comments · 6 reactions · 0 assignees · Indexed Sep 14, 2026
Add SQL GROUPING, GROUPING_ID functions Open

Area - SQL Feature/Change Description

apache/druid#9410 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
SQL: BLOOM_FILTER() does not work on constant values fed in via sub query Open

Area - SQL Feature

apache/druid#9413 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
COALESCE does not work with empty strings as documentation states it would Open

Area - SQL Bug

apache/druid#9416 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
SQL: top-level sketch functions do not return sketches Open

Area - Querying Area - SQL Bug

apache/druid#9419 · 6 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
Add namespaces to Druid segments within a data source Open

Design Review Proposal

apache/druid#9463 · 14 comments · 5 reactions · 0 assignees · Indexed Sep 14, 2026
Update parquet version in parquet-extensions to address security vulnerabilities Open

Area - Dependencies Security

apache/druid#9498 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add documentation for licenses.yaml and remove module attribute if not needed Open

Area - Dev Area - Documentation

apache/druid#9556 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

apache/druid

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