Issues

• Spark 3.4: native Iceberg scan with AQE DPP fails with "Column index 1 is out of bound" when the build side needs an inserted exchange

  bugrequires-triage
  apache/datafusion-comet#7422 · Filter by author andygrove opened on Nov 2, 2026

• Native Iceberg scan fails on DELTA_BINARY_PACKED miniblocks wider than 64 values

  requires-triage
  apache/datafusion-comet#7417 · Filter by author fresh-borzoni opened on Nov 2, 2026

• Create 1.3.0 Release (Dec 2026)

  enhancementrequires-triage
  apache/datafusion-comet#7410 · Filter by author andygrove opened on Nov 2, 2026 · 1.3.0

• Comet Native Executors: TPC-H q17 in pipelined mode takes 277 s where Ballista takes 154 s

  enhancementrequires-triage
  apache/datafusion-comet#7409 · Filter by author andygrove opened on Nov 2, 2026
  

• Comet Native Executors: broadcast a small build side in pipelined mode

  enhancementrequires-triage
  apache/datafusion-comet#7408 · Filter by author andygrove opened on Nov 2, 2026
  

• Comet Native Executors: choose partition counts for pipelined mode

  enhancementrequires-triage
  apache/datafusion-comet#7407 · Filter by author andygrove opened on Nov 2, 2026
  

• Comet Native Executors: let a fragment's partial aggregate stop aggregating, including AVG

  enhancementrequires-triage
  apache/datafusion-comet#7406 · Filter by author andygrove opened on Nov 2, 2026
  

• Bug triage results: 2026-11-02

  requires-triage
  apache/datafusion-comet#7403 · Filter by author andygrove opened on Nov 2, 2026

• Native tuple sketch functions (tuple_*, Spark 4.2): audit the crate against Java and implement

  area:aggregationarea:expressionsenhancement
  apache/datafusion-comet#7401 · Filter by author andygrove opened on Nov 2, 2026

• Native approx_top_k functions: audit the frequent-items sketch against Java and implement

  area:aggregationarea:expressionsenhancement
  apache/datafusion-comet#7400 · Filter by author andygrove opened on Nov 2, 2026

• Native KLL sketch functions (kll_*): audit the crate against Java and implement

  area:aggregationarea:expressionsenhancement
  apache/datafusion-comet#7399 · Filter by author andygrove opened on Nov 2, 2026

• Native theta sketch functions (theta_*): audit the crate against Java and implement

  area:aggregationarea:expressionsenhancement
  apache/datafusion-comet#7398 · Filter by author andygrove opened on Nov 2, 2026

• [EPIC] Native DataSketches: theta, KLL, frequent items and tuple sketches

  area:aggregationarea:expressionsenhancementEPIC
  apache/datafusion-comet#7397 · Filter by author andygrove opened on Nov 2, 2026

• Audit the HLL expressions against Spark on datasketches 0.6.0 and revisit the allowIncompatible opt-in

  area:aggregationarea:expressionsenhancement
  apache/datafusion-comet#7396 · Filter by author andygrove opened on Nov 2, 2026

• Upgrade the datasketches crate to 0.6.0 and drop the HLL decode workarounds

  area:expressionsenhancement
  apache/datafusion-comet#7395 · Filter by author andygrove opened on Nov 2, 2026

• Delta contrib: a split classloader is reported as a Comet version mismatch

  area:Deltaarea:scanbugpriority:low
  apache/datafusion-comet#7394 · Filter by author dwsmith1983 opened on Nov 2, 2026
  1

• Comet 1.1.0: FileSourceScanExec.copy NoSuchMethodError on EMR Spark 4.1.1

  area:scanbugpriority:highspark 4.1
  apache/datafusion-comet#7393 · Filter by author danielwei816 opened on Nov 2, 2026
  2

• Comet Native Executors: use Ballista's adaptive planning for joins inside Comet fragments

  enhancement
  apache/datafusion-comet#7391 · Filter by author andygrove opened on Nov 1, 2026
  

• S3 credential providers are retained until JVM shutdown when a catalog re-vends credentials

  area:Icebergarea:scanbugpriority:medium
  apache/datafusion-comet#7390 · Filter by author laxmanmamididd opened on Nov 1, 2026

• No refreshing Iceberg credential provider on Spark 3.x builds

  area:Icebergarea:scanenhancementspark 3.x
  apache/datafusion-comet#7389 · Filter by author laxmanmamididd opened on Nov 1, 2026

• The documented IcebergRESTVendedS3Provider never refreshes against a REST catalog

  area:Icebergarea:scanbugpriority:medium
  apache/datafusion-comet#7388 · Filter by author laxmanmamididd opened on Nov 1, 2026

• Native Iceberg scan fails with ExpiredToken once REST-vended credentials expire

  area:Icebergarea:scanbugpriority:medium
  apache/datafusion-comet#7387 · Filter by author laxmanmamididd opened on Nov 1, 2026

• Native parse_url returns NULL for relative URLs (no scheme), Spark parses them

  area:expressionsbugpriority:high
  apache/datafusion-comet#7385 · Filter by author valentinsoe opened on Nov 1, 2026 · 1.3.0
  

• Comet Native Executors: experiment with a native client and server for Spark's shuffle block transfer protocol

  enhancement
  apache/datafusion-comet#7384 · Filter by author andygrove opened on Nov 1, 2026
  

• Audit license and copyright texts for all native dependencies bundled in libcomet

  enhancement
  apache/datafusion-comet#7383 · Filter by author andygrove opened on Nov 1, 2026