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Error when the Python client and the cluster have different major versions

enhancementNew feature or requestNew feature or request

Status: Open.

#2513 In apache/datafusion-ballista;

· andygrove opened on Sep 29, 2026

Discussion: release the Python client separately from the Rust crates

Status: Open.

#2511 In apache/datafusion-ballista;

· andygrove opened on Sep 29, 2026

perf: shuffle writers use one blocking thread per output partition and compress outside the vcore budget

Status: Open.

#2509 In apache/datafusion-ballista;

· NoahKusaba opened on Sep 29, 2026

Discussion: move the expensive CI jobs to a merge queue, like Comet

development-process

Status: Open.

#2500 In apache/datafusion-ballista;

· andygrove opened on Sep 27, 2026

TPC-H SF1000 results for Ballista main (DataFusion 55.1.0): 0.72x of Spark 3.5, 1.45x of Spark + Comet, 15% of time in planning (#2497)

performance

Status: Open.

#2499 In apache/datafusion-ballista;

· andygrove opened on Sep 27, 2026

Proposal: Decoupled Result Service for Ballista

Status: Open.

#2484 In apache/datafusion-ballista;

· villebro opened on Sep 23, 2026

AQE replan can swap a broadcast exchange onto the probe side of a CollectLeft join, pinning the join stage to one task

Status: Open.

#2454 In apache/datafusion-ballista;

· NoahKusaba opened on Sep 14, 2026

Design note: composing multi-partition tasks with plan-level AQE in DataFusion

Status: Open.

#2445 In apache/datafusion-ballista;

· NoahKusaba opened on Sep 12, 2026

Emit the final (post-AQE) physical plan to the event log

Status: Open.

#2422 In apache/datafusion-ballista;

· andygrove opened on Sep 3, 2026

CI: Python client tests do not run on Rust changes and do not test the working tree

enhancementNew feature or requestNew feature or request

Status: Open.

#2372 In apache/datafusion-ballista;

· andygrove opened on Aug 25, 2026

Python client silently forces the static planner (pinned to ballista 54.0.0 defaults)

bugSomething isn't workingSomething isn't working

Status: Open.

#2371 In apache/datafusion-ballista;

· andygrove opened on Aug 25, 2026

Ballista 55.0.0 Release

enhancementNew feature or requestNew feature or request

Status: Open.

#2369 In apache/datafusion-ballista;

· andygrove opened on Aug 25, 2026