Ownership is measured by how many commits each author made to each file in the current tree. It highlights bus-factor risk (files only one person has ever touched) and where knowledge is concentrated. The bus factor is the smallest number of people who are, between them, primary owner of more than half of the files.
Files only one author has ever changed. The more a file has changed, the more knowledge is at risk if that person leaves.
| File | Sole owner | Commits |
|---|---|---|
| core/src/main/java/org/apache/iceberg/metrics/ScanReportParser.java | Eduard Tudenhoefner | 9 |
| core/src/main/java/org/apache/iceberg/view/BaseViewVersion.java | Eduard Tudenhoefner | 6 |
| core/src/main/java/org/apache/iceberg/Tracking.java | Anoop Johnson | 5 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/ExtendedDataSourceV2Strategy.scala | Manu Zhang | 5 |
| spark/v4.2/spark-extensions/src/test/java/org/apache/iceberg/spark/extensions/TestViews.java | Manu Zhang | 5 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/Spark3Util.java | Manu Zhang | 5 |
| core/src/test/java/org/apache/iceberg/PartitionStatisticsScanTestBase.java | gaborkaszab | 5 |
| core/src/test/resources/org/apache/iceberg/view/ViewMetadataInvalidCurrentSchema.json | Eduard Tudenhoefner | 5 |
| api/src/main/java/org/apache/iceberg/metrics/Timer.java | Eduard Tudenhoefner | 5 |
| core/src/test/java/org/apache/iceberg/rest/auth/TestOAuth2Manager.java | Alexandre Dutra | 5 |
| File | Sole owner | Commits |
|---|---|---|
| core/src/main/java/org/apache/iceberg/metrics/ScanReportParser.java | Eduard Tudenhoefner | 9 |
| core/src/main/java/org/apache/iceberg/view/BaseViewVersion.java | Eduard Tudenhoefner | 6 |
| core/src/main/java/org/apache/iceberg/Tracking.java | Anoop Johnson | 5 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/ExtendedDataSourceV2Strategy.scala | Manu Zhang | 5 |
| spark/v4.2/spark-extensions/src/test/java/org/apache/iceberg/spark/extensions/TestViews.java | Manu Zhang | 5 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/Spark3Util.java | Manu Zhang | 5 |
| core/src/test/java/org/apache/iceberg/PartitionStatisticsScanTestBase.java | gaborkaszab | 5 |
| core/src/test/resources/org/apache/iceberg/view/ViewMetadataInvalidCurrentSchema.json | Eduard Tudenhoefner | 5 |
| api/src/main/java/org/apache/iceberg/metrics/Timer.java | Eduard Tudenhoefner | 5 |
| core/src/test/java/org/apache/iceberg/rest/auth/TestOAuth2Manager.java | Alexandre Dutra | 5 |
| spark/v4.2/build.gradle | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/jmh/java/org/apache/iceberg/DeleteFileIndexBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/jmh/java/org/apache/iceberg/spark/MergeCardinalityCheckBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/jmh/java/org/apache/iceberg/spark/PlanningBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/jmh/java/org/apache/iceberg/spark/TaskGroupPlanningBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckViews.scala | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveViews.scala | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/catalyst/analysis/RewriteViewCommands.scala | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/views/CreateIcebergView.scala | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/views/ResolvedV2View.scala | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/ShowV2ViewsExec.scala | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/test/java/org/apache/iceberg/spark/extensions/TestMergeOnReadDelete.java | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/test/java/org/apache/iceberg/spark/extensions/TestRewritePositionDeleteFilesProcedure.java | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/test/java/org/apache/iceberg/spark/extensions/TestSystemFunctionPushDownDQL.java | Manu Zhang | 4 |
| spark/v4.2/spark-extensions/src/test/java/org/apache/iceberg/spark/source/PlanUtils.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/action/DeleteOrphanFilesBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/data/parquet/SparkParquetReadersFlatDataBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/data/parquet/SparkParquetReadersNestedDataBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/data/parquet/SparkParquetWritersFlatDataBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/data/parquet/SparkParquetWritersNestedDataBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/avro/AvroWritersBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/avro/IcebergSourceFlatAvroDataReadBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/avro/IcebergSourceNestedAvroDataReadBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/orc/IcebergSourceFlatORCDataReadBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/orc/IcebergSourceNestedListORCDataWriteBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/orc/IcebergSourceNestedORCDataReadBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceFlatParquetDataFilterBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceFlatParquetDataReadBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceFlatParquetDataWriteBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceNestedListParquetDataWriteBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceNestedParquetDataFilterBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceNestedParquetDataReadBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceNestedParquetDataWriteBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceParquetEqDeleteBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceParquetMultiDeleteFileBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceParquetPosDeleteBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/IcebergSourceParquetWithUnrelatedDeleteBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/ParquetWritersBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/vectorized/VectorizedReadDictionaryEncodedFlatParquetDataBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/vectorized/VectorizedReadFlatParquetDataBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/jmh/java/org/apache/iceberg/spark/source/parquet/vectorized/VectorizedReadParquetDecimalBenchmark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/RollbackStagedTable.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/SparkRewriteTableCatalog.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/SparkSQLProperties.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/data/SparkParquetWriters.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/functions/BucketFunction.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/functions/HoursFunction.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/source/BaseSparkTable.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/source/HasIcebergCatalog.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/source/SparkChangelogTable.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/source/SparkView.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/source/StagedSparkTable.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/test/java/org/apache/iceberg/spark/DummyMetricsServlet.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/test/java/org/apache/iceberg/spark/data/GenericsHelpers.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/test/java/org/apache/iceberg/spark/data/RandomData.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/test/java/org/apache/iceberg/spark/data/TestSparkParquetReader.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/test/java/org/apache/iceberg/spark/source/TestIcebergSpark.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/test/java/org/apache/iceberg/spark/sql/TestAlterTable.java | Manu Zhang | 4 |
| spark/v4.2/spark/src/test/java/org/apache/iceberg/spark/variant/TestVariantShredding.java | Manu Zhang | 4 |
| core/src/main/java/org/apache/iceberg/BasePartitionStatisticsScan.java | gaborkaszab | 4 |
| core/src/test/java/org/apache/iceberg/PartitionStatisticsTestBase.java | gaborkaszab | 4 |
| flink/v1.20/flink/src/main/java/org/apache/iceberg/flink/maintenance/operator/EqualityConvertCommitter.java | Maximilian Michels | 4 |
| flink/v1.20/flink/src/test/java/org/apache/iceberg/flink/sink/dynamic/TestCompareSchemasVisitor.java | Maximilian Michels | 4 |
| core/src/test/resources/org/apache/iceberg/view/ViewMetadataInvalidCurrentVersion.json | Eduard Tudenhoefner | 4 |
| core/src/test/resources/org/apache/iceberg/view/ViewMetadataMissingCurrentVersion.json | Eduard Tudenhoefner | 4 |
| core/src/test/resources/org/apache/iceberg/view/ViewMetadataMissingLocation.json | Eduard Tudenhoefner | 4 |
| api/src/main/java/org/apache/iceberg/metrics/LoggingMetricsReporter.java | Eduard Tudenhoefner | 4 |
| core/src/main/java/org/apache/iceberg/metrics/CounterResultParser.java | Eduard Tudenhoefner | 4 |
| flink/v2.2/flink/src/main/java/org/apache/iceberg/flink/FlinkCatalog.java | Talat UYARER | 4 |
| core/src/main/java/org/apache/iceberg/metrics/ScanMetricsUtil.java | Anton Okolnychyi | 4 |
| api/src/main/java/org/apache/iceberg/variants/VariantData.java | Ryan Blue | 3 |
| core/src/main/java/org/apache/iceberg/EntryStatus.java | Anoop Johnson | 3 |
| spark/v4.1/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/ExtendedDataSourceV2Strategy.scala | Manu Zhang | 3 |
| spark/v4.1/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/RenameV2ViewExec.scala | Manu Zhang | 3 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/IcebergAlterV2ViewSetPropertiesExec.scala | Manu Zhang | 3 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/IcebergAlterV2ViewUnsetPropertiesExec.scala | Manu Zhang | 3 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/IcebergDescribeV2ViewExec.scala | Manu Zhang | 3 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/IcebergRenameV2ViewExec.scala | Manu Zhang | 3 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/IcebergShowCreateV2ViewExec.scala | Manu Zhang | 3 |
| spark/v4.2/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/IcebergShowV2ViewPropertiesExec.scala | Manu Zhang | 3 |
| spark/v4.2/spark-extensions/src/test/java/org/apache/iceberg/spark/extensions/TestViewCatalogCache.java | Manu Zhang | 3 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/source/SparkViewDependenciesParser.java | Manu Zhang | 3 |
| spark/v4.2/spark/src/main/java/org/apache/iceberg/spark/source/SparkViewQueryColumnNamesParser.java | Manu Zhang | 3 |
| spark/v4.2/spark/src/main/scala/org/apache/spark/sql/catalyst/analysis/ViewUtil.scala | Manu Zhang | 3 |
| spark/v4.2/spark/src/test/java/org/apache/iceberg/spark/TestSparkCatalogIdentifierMapping.java | Manu Zhang | 3 |
| spark/v4.2/spark/src/test/java/org/apache/iceberg/spark/source/TestStructInternalRowGeospatial.java | Manu Zhang | 3 |
| spark/v4.1/spark-extensions/src/main/scala/org/apache/spark/sql/catalyst/analysis/ViewUtil.scala | Manu Zhang | 3 |
| spark/v4.1/spark/src/jmh/java/org/apache/iceberg/spark/source/avro/AvroWritersBenchmark.java | Manu Zhang | 3 |
| spark/v4.1/spark/src/jmh/java/org/apache/iceberg/spark/source/avro/IcebergSourceFlatAvroDataReadBenchmark.java | Manu Zhang | 3 |
| spark/v4.1/spark/src/jmh/java/org/apache/iceberg/spark/source/avro/IcebergSourceNestedAvroDataReadBenchmark.java | Manu Zhang | 3 |
Primary owner = the author with the most commits to a file. Solely owned = files only that author has touched.
| Author | Files owned | Solely owned | Files touched |
|---|---|---|---|
| Manu Zhang | 1,296 | 922 | 2,119 |
| Huaxin Gao | 692 | 5 | 1,212 |
| Maximilian Michels | 651 | 35 | 1,080 |
| Talat UYARER | 569 | 516 | 1,203 |
| Eduard Tudenhoefner | 442 | 95 | 1,779 |
| Ryan Blue | 421 | 32 | 867 |
| Steven Zhen Wu | 243 | 21 | 524 |
| Anton Okolnychyi | 211 | 25 | 1,004 |
| pvary | 179 | 24 | 412 |
| mccheah | 108 | 2 | 291 |
| Tom Tanaka | 89 | 0 | 275 |
| GuoYu | 67 | 43 | 194 |
| Yuya Ebihara | 63 | 3 | 313 |
| Xianyang Liu | 53 | 3 | 165 |
| Brian "bits" Olsen | 52 | 34 | 109 |
| Bryan Keller | 46 | 26 | 160 |
| gaborkaszab | 40 | 13 | 184 |
| Russell Spitzer | 39 | 4 | 439 |
| Piotr Findeisen | 38 | 6 | 386 |
| Kevin Liu | 37 | 7 | 140 |
| jbewing | 37 | 31 | 94 |
| Karuppayya | 34 | 2 | 78 |
| Amogh Jahagirdar | 33 | 7 | 412 |
| ggershinsky | 33 | 8 | 86 |
| Alexandre Dutra | 32 | 21 | 86 |
Files touched by the most people — shared code where changes are most likely to need coordination.
| File | Contributors | Primary owner | Owner share |
|---|---|---|---|
| build.gradle | 110 | Ryan Blue | 12.7% |
| format/spec.md | 53 | emkornfield | 10.0% |
| gradle/libs.versions.toml | 51 | Yuya Ebihara | 20.7% |
| open-api/rest-catalog-open-api.yaml | 45 | Eduard Tudenhoefner | 14.4% |
| site/docs/vendors.md | 45 | Robin Moffatt | 4.2% |
| core/src/main/java/org/apache/iceberg/TableProperties.java | 44 | Anton Okolnychyi | 25.7% |
| core/src/main/java/org/apache/iceberg/TableMetadata.java | 42 | Ryan Blue | 29.0% |
| parquet/src/main/java/org/apache/iceberg/parquet/Parquet.java | 39 | Ryan Blue | 15.9% |
| site/mkdocs.yml | 38 | Ryan Blue | 19.6% |
| settings.gradle | 38 | Ryan Blue | 14.7% |
| hive-metastore/src/main/java/org/apache/iceberg/hive/HiveTableOperations.java | 37 | Marton Bod | 10.4% |
| hive-metastore/src/main/java/org/apache/iceberg/hive/HiveCatalog.java | 37 | Naveen Kumar | 8.9% |
| README.md | 36 | Ryan Blue | 26.5% |
| core/src/main/java/org/apache/iceberg/rest/RESTSessionCatalog.java | 34 | Eduard Tudenhoefner | 34.5% |
| core/src/test/java/org/apache/iceberg/rest/TestRESTCatalog.java | 34 | Eduard Tudenhoefner | 30.6% |
| core/src/test/java/org/apache/iceberg/TestTableMetadata.java | 34 | Ryan Blue | 21.9% |
| open-api/rest-catalog-open-api.py | 33 | Fokko Driesprong | 13.0% |
| site/nav.yml | 33 | Brian "bits" Olsen | 10.3% |
| core/src/main/java/org/apache/iceberg/TableMetadataParser.java | 32 | Ryan Blue | 19.0% |
| core/src/main/java/org/apache/iceberg/BaseMetastoreTableOperations.java | 32 | Ryan Blue | 15.9% |
How Apache Iceberg compares with other Apache projects →
How Apache Iceberg ranks among Apache projects by AI-assisted commits →
Generate this report for your own repository with gitstats-action · All Gallery reports
Publishes the report to GitHub Pages on every push to main: turn on Pages for the gh-pages branch.
# .github/workflows/gitstats.yml
name: GitStats Report
on:
push:
branches: [main]
permissions:
contents: write
jobs:
gitstats:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v7
with:
fetch-depth: 0
- uses: shenxianpeng/gitstats-action@v1
with:
deploy-to-pages: true