Add blog post about Arrow Java 19.0.0 release (#771)

Author: jbonofre

_posts/2026-03-16-arrow-java-19.0.0.md

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+---
+layout: post
+title: "Apache Arrow Java 19.0.0 Release"
+date: "2026-03-16 00:00:00"
+author: pmc
+categories: [release]
+---
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+
+The Apache Arrow team is pleased to announce the [v19.0.0](https://github.com/apache/arrow-java/releases/tag/v19.0.0) release of Apache Arrow Java. 
+
+## Changelog
+
+### What's Changed
+
+#### Breaking Changes
+* GH-774: Consoliate BitVectorHelper.getValidityBufferSize and BaseValueVector.getValidityBufferSizeFromCount by @rtadepalli in [#775](https://github.com/apache/arrow-java/pull/775)
+* GH-586: Override fixedSizeBinary method for UnionMapWriter by @axreldable in [#885](https://github.com/apache/arrow-java/pull/885)
+* GH-891: Add ExtensionTypeWriterFactory to TransferPair by @jhrotko in [#892](https://github.com/apache/arrow-java/pull/892)
+* GH-948: Use buffer indexing for UUID vector by @jhrotko in [#949](https://github.com/apache/arrow-java/pull/949)
+* GH-139: [Flight] Stop return null from MetadataAdapter.getAll(String) and getAllByte(String) by @axreldable in [#1016](https://github.com/apache/arrow-java/pull/1016)
+
+#### New Features and Enhancements
+* GH-52: Make RangeEqualsVisitor of RunEndEncodedVector more efficient by @ViggoC in [#761](https://github.com/apache/arrow-java/pull/761)
+* GH-765: Do not close/free imported BaseStruct objects by @pepijnve in [#766](https://github.com/apache/arrow-java/pull/766)
+* GH-79: Move splitAndTransferValidityBuffer to BaseValueVector by @rtadepalli in [#777](https://github.com/apache/arrow-java/pull/777)
+* GH-731: Avro adapter, output dictionary-encoded fields as enums by @martin-traverse in [#779](https://github.com/apache/arrow-java/pull/779)
+* GH-725: Added ExtensionReader by @xxlaykxx in [#726](https://github.com/apache/arrow-java/pull/726)
+* GH-882: Add support for loading native library from a user specified location by @pepijnve in [#883](https://github.com/apache/arrow-java/pull/883)
+* GH-109: Implement Vector Validators for StringView by @ViggoC in [#886](https://github.com/apache/arrow-java/pull/886)
+* GH-900: Fix gandiva groupId in arrow-bom by @XN137 in [#901](https://github.com/apache/arrow-java/pull/901)
+* GH-762: Implement VectorAppender for RunEndEncodedVector by @ViggoC in [#884](https://github.com/apache/arrow-java/pull/884)
+* GH-825: Add UUID canonical extension type by @jhrotko in [#903](https://github.com/apache/arrow-java/pull/903)
+* GH-110: Flight SQL JDBC related StringView components implementation by @ViggoC in [#905](https://github.com/apache/arrow-java/pull/905)
+* GH-863: [JDBC] Suppress benign exceptions from gRPC layer on ArrowFlightSqlClientHandler#close by @ennuite in [#910](https://github.com/apache/arrow-java/pull/910)
+* GH-929: Add UUID support in JDBC driver by @xborder in [#930](https://github.com/apache/arrow-java/pull/930)
+* GH-952: Add OAuth support by @xborder in [#953](https://github.com/apache/arrow-java/pull/953)
+* GH-946: Add Variant extension type support by @tmater in [#947](https://github.com/apache/arrow-java/pull/947)
+* GH-130: Fix AutoCloseables to work with @nullable structures by @axreldable in [#1017](https://github.com/apache/arrow-java/pull/1017)
+* GH-1038: Trim object memory for ArrowBuf by @lriggs in [#1044](https://github.com/apache/arrow-java/pull/1044)
+* GH-1061: Add codegen classifier jar for arrow-vector. by @lriggs in [#1062](https://github.com/apache/arrow-java/pull/1062)
+* GH-301: [Vector] Allow adding a vector at the end of VectorSchemaRoot by @axreldable in [#1013](https://github.com/apache/arrow-java/pull/1013)
+* GH-552: [Vector] Add absent methods to the UnionFixedSizeListWriter by @axreldable in [#1052](https://github.com/apache/arrow-java/pull/1052)
+
+**Full Changelog**: [changelog](https://github.com/apache/arrow-java/commits/v19.0.0)