20.0.0

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GH-939: Remove reflection for gRPC buffers

enhancementPRs that add or improve features.PRs that add or improve features.

Status: Open (in progress).

apache/arrow-javanumber 954

#954 In apache/arrow-java;

· xborder opened on Jan 11, 2026

GH-734: Improve CompositeJdbcConsumer error handling and add unit tests

bug-fixPRs that fix a big.PRs that fix a big.

Status: Open (in progress).

apache/arrow-javanumber 778

#778 In apache/arrow-java;

· Odin-BN opened on May 30, 2025

GH-1020: Update vcpkg revision

chorePRs that make misc changes.PRs that make misc changes.

Status: Draft (not ready).

apache/arrow-javanumber 1023

#1023 In apache/arrow-java;

· kou opened on Feb 16, 2026

Update vcpkg revision for Linux JNI build

Type: enhancementNew feature or requestNew feature or request

Status: Open.

#1020 In apache/arrow-java;

· kou opened on Feb 16, 2026

GH-794: Avro file read and write support

enhancementPRs that add or improve features.PRs that add or improve features.

Status: Open (in progress).

apache/arrow-javanumber 802

#802 In apache/arrow-java;

· martin-traverse opened on Jul 21, 2025

GH-979: Adds documentation for Flight SQL

enhancementPRs that add or improve features.PRs that add or improve features.

Status: Open (in progress).

apache/arrow-javanumber 980

#980 In apache/arrow-java;

· jorisgillis opened on Jan 24, 2026

Add documentation of Flight SQL

Type: enhancementNew feature or requestNew feature or request

Status: Open.

#979 In apache/arrow-java;

· jorisgillis opened on Jan 24, 2026

Avro adapter - Read and write Avro container files

Type: enhancementNew feature or requestNew feature or request

Status: Open.

#794 In apache/arrow-java;

· martin-traverse opened on Jul 7, 2025

Support per-batch custom_metadata on RecordBatch (IPC Message field)

Type: enhancementNew feature or requestNew feature or request

Status: Open.

#1035 In apache/arrow-java;

· ennuite opened on Feb 24, 2026

[FlightRPC] Remove sketchy gRPC reflection code

help wantedExtra attention is neededExtra attention is needed

Type: bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#939 In apache/arrow-java;

· lidavidm opened on Dec 29, 2025

GH-926: Shade arrow-compression with Flight JDBC driver

enhancementPRs that add or improve features.PRs that add or improve features.

Status: Open (in progress).

apache/arrow-javanumber 937

#937 In apache/arrow-java;

· xborder opened on Dec 24, 2025

JDBC driver does not support compressed IPC streams (ZSTD, LZ4) [FlightSQL]

help wantedExtra attention is neededExtra attention is needed

Type: bugSomething isn't workingSomething isn't working

Status: Open.

#926 In apache/arrow-java;

· aarshivv opened on Dec 2, 2025

GH-838: [FlightSQL][JDBC] Fix timestamp unit conversion and sub-millisecond precision in PreparedStatement parameter binding

breaking-change

bug-fixPRs that fix a big.PRs that fix a big.

Status: Draft (not ready).

apache/arrow-javanumber 1081

#1081 In apache/arrow-java;

· dmitry-chirkov-dremio opened on Mar 21, 2026

[JAVA] FlightSQL JDBC Driver PreparedStatement#setTimestamp() ignores connection timeStampPrecision

Type: bugSomething isn't workingSomething isn't working

Status: Open.

#838 In apache/arrow-java;

· psixto-denodo opened on Sep 5, 2025

GH-62: Optimize Flight SQL JDBC Statement execution paths

Status: Open (in progress).

apache/arrow-javanumber 1090

#1090 In apache/arrow-java;

· xborder opened on Mar 24, 2026

GH-1134: add COLUMN_DEF support to JDBC getColumnns()

enhancementPRs that add or improve features.PRs that add or improve features.

Status: Open (in progress).

apache/arrow-javanumber 1139

#1139 In apache/arrow-java;

· Verest opened on May 6, 2026

GH-1109: Fix ComplexCopier for extension-type holder readers

bug-fixPRs that fix a big.PRs that fix a big.

Status: Open (in progress).

apache/arrow-javanumber 1137

#1137 In apache/arrow-java;

· bodduv opened on May 6, 2026

GH-1125: Read empty ListVector correctly using UnionListReader after IPC deser

bug-fixPRs that fix a big.PRs that fix a big.

Status: Open (in progress).

apache/arrow-javanumber 1136

#1136 In apache/arrow-java;

· bodduv opened on May 6, 2026

UnionListReader.setPosition throws IOOBE on a post-IPC empty List

Type: bugSomething isn't workingSomething isn't working

Status: Open.

#1125 In apache/arrow-java;

· bodduv opened on Apr 21, 2026

Consume COLUMN_DEF in JDBC Flight Driver

Type: enhancementNew feature or requestNew feature or request

Status: Open.

#1134 In apache/arrow-java;

· Verest opened on May 4, 2026

[Vector][ExtensionType] ComplexCopier requires that extension types' holder readers implement getField

Type: bugSomething isn't workingSomething isn't working

Status: Open.

#1109 In apache/arrow-java;

· bodduv opened on Apr 10, 2026

MINOR: Bump org.apache.calcite.avatica:avatica from 1.27.0 to 1.28.0

dependenciesPull requests that update a dependency filePull requests that update a dependency file

javaPull requests that update Java codePull requests that update Java code

Status: Open (in progress).

apache/arrow-javanumber 1165

#1165 In apache/arrow-java;

· dependabot opened on May 25, 2026

[IPC][ZSTD] Compressed buffer prefix can be written as 0 while ZSTD frame has non-zero content size

Type: bugSomething isn't workingSomething isn't working

Status: Open.

#1116 In apache/arrow-java;

· m8928 opened on Apr 15, 2026

GH-1228: Arrow Format 1.5: Decimal32/Decimal64 support

enhancementPRs that add or improve features.PRs that add or improve features.

Status: Open (in progress).

apache/arrow-javanumber 1227

#1227 In apache/arrow-java;

· robert3005 opened on Jul 14, 2026

Support Format Spec 1.5 - Decimal32/64

Type: enhancementNew feature or requestNew feature or request

Status: Open.

#1228 In apache/arrow-java;

· robert3005 opened on Jul 14, 2026