Issues

• [BUG] Flink COW upsert writer can roll back the instant it is committing

  type:bug
  apache/hudi#20388 · Filter by author wombatu-kun opened on Oct 18, 2026

• Avro parquet reader misreads decimal columns stored as INT32/INT64

  area:readerpriority:high
  apache/hudi#20386 · Filter by author yihua opened on Oct 18, 2026
  1

• hudi-bot stopped mirroring PRs on 2026-10-06, so Azure CI has not run since

  area:ci
  apache/hudi#20384 · Filter by author wombatu-kun opened on Oct 17, 2026

• Meta sync fails when the archiver removes an old clean instant while computing dropped partitions

  area:catalogpriority:medium
  apache/hudi#20379 · Filter by author yihua opened on Oct 16, 2026
  1

• [BUG] On table version 10, deletes fail or are lost with the Spark record type and a string ordering field

  type:bug
  apache/hudi#20372 · Filter by author wombatu-kun opened on Oct 16, 2026

• HoodieCatalog.alterTable throws MatchError for DeleteColumn / UpdateColumnNullability / UpdateColumnPosition and rejects idempotent SetProperty

  area:catalogarea:sqlengine:sparkpriority:mediumtype:bug
  apache/hudi#20371 · Filter by author nsivabalan opened on Oct 16, 2026

• HoodieStreamingSink calls System.exit(1) after write retries are exhausted

  area:streamingengine:sparkpriority:hightype:bug
  apache/hudi#20370 · Filter by author nsivabalan opened on Oct 16, 2026

• saveAsTable(mode=append) onto an existing Hudi table fails in CreateHoodieTableAsSelectCommand under HoodieCatalog

  area:catalogarea:sqlengine:sparkpriority:hightype:bug
  apache/hudi#20369 · Filter by author nsivabalan opened on Oct 16, 2026

• [BUG] A stale Spark delete removes a newer row when the ordering field is nested

  type:bug
  apache/hudi#20367 · Filter by author wombatu-kun opened on Oct 16, 2026
  2

• [BUG] Spark log compaction fails on delete blocks when the ordering field is a string or decimal

  type:bug
  apache/hudi#20365 · Filter by author wombatu-kun opened on Oct 16, 2026
  1

• [BUG] Downgrade below version 9 records several ordering fields as a single precombine field

  type:bug
  apache/hudi#20347 · Filter by author wombatu-kun opened on Oct 15, 2026

• [BUG] Tables below version 9 lack hoodie.table.precombine.field, so 0.x and 1.0.x see no ordering field

  type:bug
  apache/hudi#20345 · Filter by author wombatu-kun opened on Oct 15, 2026

• [SUPPORT] Spark FGR: sampled size extrapolation triggers spill for long-tailed UnsafeRows

  type:community-support
  apache/hudi#20344 · Filter by author q2788116586-tech opened on Oct 15, 2026

• HoodieIndexer rebuilds a partitioned record-level index as a global one

  apache/hudi#20343 · Filter by author nsivabalan opened on Oct 15, 2026

• [Flink] Speed up streaming split discovery by batching file existence checks per directory

  type:devtask
  apache/hudi#20338 · Filter by author skywalker0618 opened on Oct 14, 2026
  3

• [FEATURE] Recover table when hoodie.properties is corrupted or missing

  apache/hudi#20335 · Filter by author y2ksayed opened on Oct 14, 2026
  

• Flink global failover can trigger concurrent commits for the same instant

  apache/hudi#20331 · Filter by author cshuo opened on Oct 14, 2026

• [BUG] Log compaction rewrites record commit times; incremental reads re-emit old rows after cleaning (1.2.1)

  type:bug
  apache/hudi#20327 · Filter by author prakashgyank46-commits opened on Oct 14, 2026

• [BUG] Log compaction scheduling throws NPE when CDC log blocks are present (Hudi 1.2.1)

  type:bug
  apache/hudi#20325 · Filter by author prakashgyank46-commits opened on Oct 14, 2026
  1

• Variant type certification: per-type storage matrix across shredded layouts and record types

  apache/hudi#20322 · Filter by author voonhous opened on Oct 14, 2026
  1

  

• [BUG] flink: bucket pruning misses rows on tables with one primary key and multiple partition fields

  engine:flinktype:bug
  apache/hudi#20313 · Filter by author wombatu-kun opened on Oct 14, 2026

• [Improvement] Avoid cross-partition hot-bucket concentration in RemotePartitioner

  type:devtask
  apache/hudi#20306 · Filter by author K1taIkuyo0421 opened on Oct 13, 2026
  3

• Spark data skipping drops matching rows after adding columns to the column stats index

  engine:sparktype:bug
  apache/hudi#20296 · Filter by author cshuo opened on Oct 13, 2026

• Flink timestamp predicates lose microsecond precision during filtering and index lookup

  engine:flinktype:bug
  apache/hudi#20293 · Filter by author cshuo opened on Oct 13, 2026

• Flink bucket pruning misses compound keys containing placeholder literals

  engine:flinktype:bug
  apache/hudi#20291 · Filter by author cshuo opened on Oct 13, 2026