apache/iceberg

Apache Iceberg

Stars: 9.2k
Forks: 3.5k
Open beginner issues: 0
Indexed issues: 450
Avg merge: 2d 16h
Merged PRs (30d): 129

Dominant language: Java
License: Apache-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Open All

443 open issues indexed

Snowflake: Avoid unbounded FileIO accumulation in SnowflakeCatalog Open

apache/iceberg#17095 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Kafka Connect: Add OpenTelemetry distributed tracing support Open

improvement

apache/iceberg#17115 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Core: Add metadata table for discovering metadata tables Open

improvement

apache/iceberg#17132 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Fix TIMESTAMP_MILLIS scaling for dictionary-encoded columns in Vectorized Spark Reader Open

apache/iceberg#17135 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Improve table spec page's table formatting Open

apache/iceberg#17139 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
feat: Delta to Iceberg v3 conversion support tracking issue Open

improvement

apache/iceberg#17146 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
REST Catalog: Return LoadTableResult for successful update requests Open

improvement

apache/iceberg#17154 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add a property to configure the checksum algorithm in S3FileIO Open

apache/iceberg#17178 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Kafka Connect: `cg-control` consumer group fails to stabilize on idle/low-volume topics after PR #14395 Open

bug

apache/iceberg#17193 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 14, 2026
rewrite_data_files silently drops all compaction progress (and can NPE) when the starting snapshot is expired concurrently Open

apache/iceberg#17202 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
RemoveDanglingDeletes does not remove dangling v2 file-scoped position delete files (only DVs are handled) Open

apache/iceberg#17203 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Scan planning fails permanently with "Can't index multiple DVs" when a snapshot has duplicate deletion vectors for one data file (read-side recovery) Open

apache/iceberg#17206 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
DeleteOrphanFiles can corrupt other tables that share the same table location Open

bug

apache/iceberg#17213 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Core: harden puffin reader to malformed input Open

improvement

apache/iceberg#17214 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
add general guideline for technical blog posts Open

apache/iceberg#17216 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
list all checks to perform for any release from the iceberg project Open

apache/iceberg#17217 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Open-API: RESTCatalogServer.stop() leaks the backend catalog Open

apache/iceberg#17232 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
v3 deletion-vector MERGE grows executor memory without bound under high-churn streaming upserts Open

bug

apache/iceberg#17241 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
AWS: AssumeRoleAwsClientFactory.s3() skips S3 access grants and user agent config Open

apache/iceberg#17245 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Azure: ADLSFileIO.listPrefix returns relative paths instead of fully-qualified URIs Open

apache/iceberg#17247 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add option to prune column stats when rewriting manifests Open

apache/iceberg#17257 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Docs: Delta Lake migration Output table names a result that does not exist Open

apache/iceberg#17266 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Data: TestWriterMetrics.testMaxColumnsWithDefaultOverride does not verify bounds Open

apache/iceberg#17268 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Dell: EcsCatalog leaks S3Exception for missing namespace properties Open

apache/iceberg#17270 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Hive: dropTable silently drops an Iceberg view Open

apache/iceberg#17278 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Make Metadata Timestamp Clock Skew Configurable Open

improvement

apache/iceberg#17285 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Spark: CREATE VIEW ... WITH SCHEMA EVOLUTION fails for VALUES queries during SELECT Open

bug

apache/iceberg#17288 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Flink: MULTISET columns cannot be written — Parquet/Avro/ORC data writers reject MultisetType Open

apache/iceberg#17298 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
JdbcCatalog: getColumns/getTables with null catalog causes cross-schema false positive, leading to "Unknown column 'iceberg_type'" error Open

apache/iceberg#17300 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Parquet: notNaN filter crashes on columns absent from older files Open

bug

apache/iceberg#17301 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Arrow: Improve initial capacity estimation for variable-width vectors Open

apache/iceberg#17305 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Core: Orphaned merged DV file on cache invalidation and commit failure Open

bug

apache/iceberg#17307 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Docs: Implementation Status page missing Table Spec V3 breakdown Open

apache/iceberg#17308 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
DynamicWriteResultSerializer version not bumped after format change Open

bug

apache/iceberg#17314 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[REST Scan Planning] Missing sequence number on `DataFile` object Open

bug

apache/iceberg#17319 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[FixtureCatalog][Dev][Scan Planning] Catalog server returns invalid (cut off) JSON response Open

bug

apache/iceberg#17324 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Kafka Connect: id-columns config ignored for namespaced tables Open

apache/iceberg#17325 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Kafka Connect: DebeziumTransform tombstone path is not covered by any test Open

apache/iceberg#17326 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Benchmarks: make jmh.gradle run cleanly on JDK 17 (module opens, configurable heap, failOnError) Open

apache/iceberg#17330 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Race Condition in CachingCatalog Open

bug

apache/iceberg#17338 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Core: Add metadata tables for Puffin file references Open

improvement

apache/iceberg#17339 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Kafka Connect: Coord consumer group on iceberg control topic with phantom consumer after stopping a connector Open

bug

apache/iceberg#17349 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
DeleteOrphanFilesSparkAction triggers OutOfMemoryError (due to JVM Array size limit) when using usePrefixListing(true) Open

bug

apache/iceberg#17387 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add JDK25 as a Target Open

improvement

apache/iceberg#17421 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Spark RewriteManifestsSparkAction sortBy throws "AnalysisException: [FIELD_NOT_FOUND] No such struct field" for nested field in partition spec Open

bug

apache/iceberg#17425 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Bug] REST server-side scan planning retains fetched FileScanTasks indefinitely Open

bug

apache/iceberg#17427 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Implement Inheritance in the V4 reader Open

Iceberg V4 improvement

apache/iceberg#17435 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Implement Content Stats integration in v4 reader Open

Iceberg V4 improvement

apache/iceberg#17436 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Kafka Connect: duplicate PK rows when two PK updates land in one snapshot after a crash Open

bug

apache/iceberg#17455 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Guidance Needed: expireSnapshots policy and operational guardrails to prevent unexpected missing Puffin file failures Open

bug

apache/iceberg#17456 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026

A short digest of beginner-friendly GitHub issues.