Issues

• Native Iceberg scan reads the wrong struct child for name-mapped files whose nested names differ in case

  requires-triage
  apache/datafusion-comet#7134 · Filter by author dwsmith1983 opened on Oct 20, 2026

• Discuss limiting open PRs per contributor without write access

  enhancementrequires-triage
  apache/datafusion-comet#7133 · Filter by author andygrove opened on Oct 20, 2026
  2

  

• Native Iceberg scan applies equality deletes to the wrong column when column names differ only in case

  requires-triage
  apache/datafusion-comet#7129 · Filter by author dwsmith1983 opened on Oct 20, 2026

• Native object-store errors and debug logs print whole URLs outside the Azure store

  requires-triage
  apache/datafusion-comet#7128 · Filter by author dwsmith1983 opened on Oct 20, 2026

• Text broadcast build sides and string min/max apply the invalid UTF-8 decode where 1.1.0 stayed on Spark

  bugcorrectnessrequires-triage
  apache/datafusion-comet#7118 · Filter by author andygrove opened on Oct 19, 2026 · 1.2.0

• Keep wide-decimal scalar AVG native with a wider running sum

  requires-triage
  apache/datafusion-comet#7116 · Filter by author sunchao opened on Oct 19, 2026

• Support join runtime reader filters through column-only projections

  requires-triage
  apache/datafusion-comet#7113 · Filter by author sunchao opened on Oct 19, 2026

• NativeUtil.exportBatch rejects large_string and large_binary vectors

  requires-triage
  apache/datafusion-comet#7109 · Filter by author andygrove opened on Oct 19, 2026

• Executor is OOM-killed while Comet's pool and allocation counter stay under the limit: glibc keeps several GiB of freed native memory

  requires-triage
  apache/datafusion-comet#7108 · Filter by author dwsmith1983 opened on Oct 19, 2026

• Bug triage results: 2026-10-18

  requires-triage
  apache/datafusion-comet#7105 · Filter by author andygrove opened on Oct 18, 2026

• External sort OOM error tells Comet users to change datafusion.runtime.memory_limit and datafusion.execution.sort_spill_reservation_bytes

  enhancement
  apache/datafusion-comet#7102 · Filter by author viirya opened on Oct 18, 2026

• docs: update Scala comments that reference the removed iceberg-writes.md page

  enhancement
  apache/datafusion-comet#7101 · Filter by author andygrove opened on Oct 18, 2026

• perf: native Parquet scans fetch each file and row group only after the previous one is decoded

  area:scanenhancementperformance
  apache/datafusion-comet#7093 · Filter by author andygrove opened on Oct 17, 2026 · 1.2.0
  1

  

• BoundedWindowAggExec reserves no memory for the rows its window frames keep

  area:memorybugpriority:medium
  apache/datafusion-comet#7092 · Filter by author andygrove opened on Oct 17, 2026
  3

  

• Spill limit error tells Comet users to raise datafusion.runtime.max_temp_directory_size

  enhancement
  apache/datafusion-comet#7091 · Filter by author andygrove opened on Oct 17, 2026
  1

• fair_unified's per-consumer limit does not bind when tasks run concurrently, so one consumer can starve another

  bugpriority:medium
  apache/datafusion-comet#7088 · Filter by author andygrove opened on Oct 17, 2026 · 1.2.0
  

• Replace remaining unwrap calls on protobuf input in the native planner with errors

  enhancement
  apache/datafusion-comet#7086 · Filter by author 0lai0 opened on Oct 17, 2026
  1

  

• map_from_entries dispatches a calendar-interval result into the microsecond overflow

  area:expressionsbugpriority:medium
  apache/datafusion-comet#7083 · Filter by author dwsmith1983 opened on Oct 17, 2026
  1

  

• bench: add the shuffle benchmark cases that the #5905 review found missing

  area:shuffleenhancementgood first issueperformance
  apache/datafusion-comet#7080 · Filter by author andygrove opened on Oct 16, 2026
  1

  

• perf: Celeborn push completion is polled every 10 ms and the transport hook proxies every channel of the shared factory

  area:shuffleenhancementperformance
  apache/datafusion-comet#7079 · Filter by author andygrove opened on Oct 16, 2026

• perf: the native Celeborn writer pays a large fixed cost per frame (admission, schema, estimates, re-encodes)

  area:shuffleenhancementperformance
  apache/datafusion-comet#7078 · Filter by author andygrove opened on Oct 16, 2026

• perf: the native Celeborn writer sends one frame per partition chunk with no coalescing

  area:shuffleenhancementperformance
  apache/datafusion-comet#7077 · Filter by author andygrove opened on Oct 16, 2026

• perf: the native Celeborn writer reserves about 7x a batch and holds it through the network round trip

  area:memoryarea:shuffleenhancementperformance
  apache/datafusion-comet#7076 · Filter by author andygrove opened on Oct 16, 2026

• perf: the JVM shuffle's native radix sort always runs six passes, and the JVM reserves scratch it never uses

  area:shuffleenhancementperformance
  apache/datafusion-comet#7075 · Filter by author andygrove opened on Oct 16, 2026

• perf: the JVM columnar shuffle insert loop boxes, locks and copies every row more than once

  area:shuffleenhancementperformance
  apache/datafusion-comet#7074 · Filter by author andygrove opened on Oct 16, 2026