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Comet 1.0.0 Release

enhancementNew feature or requestNew feature or request

requires-triage

Status: Open.

#4082 In apache/datafusion-comet;

· andygrove opened on Apr 25, 2026

·  

1.0.0

Comet 0.16.0 Release

enhancementNew feature or requestNew feature or request

requires-triage

Status: Open.

#4081 In apache/datafusion-comet;

· andygrove opened on Apr 25, 2026

Expressions added via CometExprShim bypass the CometExpressionSerde framework

requires-triage

Status: Open.

#4077 In apache/datafusion-comet;

· andygrove opened on Apr 25, 2026

·  

0.16.0

Fix issues found when documenting current expression incompatibilities

bugSomething isn't workingSomething isn't working

requires-triage

Status: Open.

#4074 In apache/datafusion-comet;

· andygrove opened on Apr 24, 2026

·  

0.16.0

Metric reporting from native to JVM is a hot-path allocator / JNI bottleneck

performance

Status: Open.

#4072 In apache/datafusion-comet;

· andygrove opened on Apr 24, 2026

Test Comet with DataFusion lambda functions

enhancementNew feature or requestNew feature or request

requires-triage

Status: Open.

#4069 In apache/datafusion-comet;

· comphead opened on Apr 24, 2026

Add Java 21 to the supported version matrix (particularly for Spark 4.0)

requires-triage

Status: Open.

#4059 In apache/datafusion-comet;

· james-willis opened on Apr 24, 2026

Change Comet default Spark version to 4.0

enhancementNew feature or requestNew feature or request

requires-triage

spark 4

Status: Open.

#4054 In apache/datafusion-comet;

· andygrove opened on Apr 23, 2026

·  

0.16.0

Broadcast hash join and sort-merge join can produce incorrect results on non-default collated keys [Spark 4]

bugSomething isn't workingSomething isn't working

correctness

priority:criticalData corruption, silent wrong results, security issuesData corruption, silent wrong results, security issues

spark 4

Status: Open.

#4051 In apache/datafusion-comet;

· andygrove opened on Apr 23, 2026

Improve audit & correctness checking/reporting processes

enhancementNew feature or requestNew feature or request

requires-triage

Status: Open.

#4050 In apache/datafusion-comet;

· andygrove opened on Apr 23, 2026

Comet DPP exchange/broadcast reuse fails under AQE

requires-triage

Status: Open.

#4045 In apache/datafusion-comet;

· andygrove opened on Apr 23, 2026

Migrate 4.0.1 support to 4.0.2

enhancementNew feature or requestNew feature or request

requires-triage

spark 4

Status: Open.

#4027 In apache/datafusion-comet;

· kazuyukitanimura opened on Apr 22, 2026