Issues

• NoSuchMethodError with gRPC Java 1.79.0

  Type: bug
  apache/arrow-java#1024 · Filter by author hisener opened on Feb 17, 2026 · Updated on Oct 8, 2026
  2

• ArrowBuf.setBytes(long, ByteBuffer, int, int) does not bounds-check the source buffer

  apache/arrow-java#1336 · Filter by author Arawoof06 opened on Oct 8, 2026 · Updated on Oct 8, 2026
  1

• Bug Report: Column Nullability Not Honored in FlightSqlProducer Schema

  Type: bug
  apache/arrow-java#782 · Filter by author bineetsingh30 opened on Jun 2, 2025 · Updated on Oct 8, 2026 · 20.0.0

• Root Allocator doesn't release memory when its closed

  Type: bug
  apache/arrow-java#950 · Filter by author krishan1390 opened on Jan 8, 2026 · Updated on Oct 7, 2026
  7

• [Java] Implement arrow-memory-ffm

  apache/arrow-java#163 · Filter by author danepitkin opened on Sep 15, 2023 · Updated on Oct 7, 2026 · 20.0.0
  6

  

• DictionaryEncoder.decode accepts out-of-range dictionary indices

  apache/arrow-java#1261 · by Filter by author Arawoof06 was closed on Oct 6, 2026 · Updated on Oct 6, 2026 · 20.0.0

• [Java][IPC] AbstractCompressionCodec.compress() writes prefix=0 for empty buffers, incompatible with C++/Python readers

  Type: bug
  apache/arrow-java#1196 · by Filter by author zgdgod was closed on Oct 6, 2026 · Updated on Oct 6, 2026 · 20.0.0
  1

• Byte-array elements leak in FromSchemaByteArray()

  Type: bug
  apache/arrow-java#1205 · by Filter by author K-ANOY was closed on Oct 6, 2026 · Updated on Oct 6, 2026 · 20.0.0

• [Java][FlightRPC] Unbounded allocation from untrusted FlightData frame length prefix in ArrowMessage.frame

  apache/arrow-java#1317 · by Filter by author Arawoof06 was closed on Oct 6, 2026 · Updated on Oct 6, 2026 · 20.0.0

• [Java] Flaky tests meta-issue

  Type: enhancement
  apache/arrow-java#191 · Filter by author lidavidm opened on Jun 6, 2023 · Updated on Oct 6, 2026

• [Java][FlightRPC] Flaky test TestDoExchange.tearDown

  Type: enhancement
  apache/arrow-java#384 · by Filter by author asfimport was closed on Oct 6, 2026 · Updated on Oct 6, 2026 · 20.0.0
  1

• ArrowFlightJdbcArray.getArray(index, count) can read past the end of the array slice

  apache/arrow-java#1236 · Filter by author Arawoof06 opened on Jul 20, 2026 · Updated on Oct 5, 2026 · 20.0.0

• [Java] VectorUnloader has multiple memory leak issues

  Type: bug
  apache/arrow-java#1234 · by Filter by author zhangkre was closed on Oct 5, 2026 · Updated on Oct 5, 2026 · 20.0.0
  3

• Out-of-bounds read for corrupt view offsets in BaseVariableWidthViewVector

  apache/arrow-java#1217 · by Filter by author Arawoof06 was closed on Oct 5, 2026 · Updated on Oct 5, 2026 · 20.0.0

• VectorAppender fails with OversizedAllocationException when appending to empty UnionVector

  Type: bug
  apache/arrow-java#812 · by Filter by author adnan-bubalo was closed on Oct 4, 2026 · Updated on Oct 4, 2026 · 20.0.0

• Add support for the arrow.json extension type

  Type: enhancement
  apache/arrow-java#1302 · by Filter by author ddupg was closed on Oct 4, 2026 · Updated on Oct 4, 2026 · 20.0.0

• ListViewVector#copyFrom Throws IndexOutOfBoundsException on Non-Empty Elements

  help wantedType: bug
  apache/arrow-java#471 · by Filter by author nbauernfeind was closed on Oct 3, 2026 · Updated on Oct 3, 2026 · 20.0.0

• Flight SQL JDBC interval strings use the default locale for digits

  apache/arrow-java#1311 · by Filter by author Arawoof06 was closed on Oct 3, 2026 · Updated on Oct 3, 2026 · 20.0.0