--- schema_version: "1" id: 2bc286b455c4d26346e9912d2bcf4e6a0342f74d8c6068b0500b22a0d5c66c43 title: DataWeave 2.12.0 Release Notes collection: mulesoft version: current locale: ja-jp portal_url: https://docs.salesforce.com/mulesoft/current/ja-jp/release-notes/dataweave/dataweave-2.12.0-release-notes.md canonical_url: https://docs.mulesoft.com/jp/release-notes/dataweave/dataweave-2.12.0-release-notes source_site: docs.mulesoft.com content_type: documentation content_hash: 77dfbd04f228b18db61b19c4739289dc6f42cf7fe093b02b36e475e4682208d2 description: MuleSoft Documentation Site latest: true --- # DataWeave 2.12.0 Release Notes Unresolved include directive in modules/ROOT/pages/dataweave/dataweave-2.12.0-release-notes.adoc - include::dataweave::partial$dataweave-intro.adoc\[\] For more detail, see [DataWeave Language](https://docs.mulesoft.com/dataweave/latest/). ## [](#september-2026)September 2026 DataWeave 2.12.3 is bundled with the Mule 4.12.3 release. The Mule patch release addresses these DataWeave issues:
Issue Resolution ID

You can now configure the size of the DataWeave script parser cache by using the mule.weave.script.parser.cache.size system property.

W-23138851

A thread-safety livelock no longer occurs in the Java module builder and converter caches.

W-23652160
For details about the Mule release and patch updates, see [Mule Runtime Engine 4.12.0 Release Notes](https://docs.mulesoft.com/jp/release-notes/mule-runtime/mule-4.12.0-release-notes). ## [](#august-2026)August 2026 DataWeave 2.12.2 is bundled with the Mule 4.12.2 release. The Mule patch release addresses these DataWeave issues:
Issue Resolution ID

The repeated attribute selector (.*@) now correctly preserves values when processing data structures containing empty map slots.

W-23457314

Type metadata processing now correctly handles sibling references that target the same type, preventing duplicate annotations.

W-23424037

DataWeave now handles Java Platform Module System (JPMS) access restrictions more gracefully when running on Java 17 and later in Mule runtime 4.6.0 and later.

W-23354139

The Jackson library is upgraded to 2.21.5.

W-23037592

The per_app_java_bean_cache compatibility flag now correctly reports its creation version as 2.9.

W-22417507
For details about the Mule release and patch updates, see [Mule Runtime Engine 4.12.0 Release Notes](https://docs.mulesoft.com/jp/release-notes/mule-runtime/mule-4.12.0-release-notes). ## [](#july-2026)July 2026 DataWeave 2.12.1 is bundled with the Mule 4.12.1 release. The Mule patch release addresses these DataWeave issues:
Issue Resolution ID

Scope resolution errors no longer occur when importing Java classes with self-referential array properties.

W-22914494

StackOverflowError errors no longer occur when computing or converting type metadata for self-referencing recursive types.

W-21712344
For details about the Mule release and patch updates, see [Mule Runtime Engine 4.12.0 Release Notes](https://docs.mulesoft.com/jp/release-notes/mule-runtime/mule-4.12.0-release-notes). ## [](#june-2-2026)June 2, 2026 DataWeave 2.12.0 is bundled with the Mule 4.12.0 release. For details about the Mule release, see [Mule Runtime Engine 4.12.0 Release Notes](https://docs.mulesoft.com/jp/release-notes/mule-runtime/mule-4.12.0-release-notes). ### What’s New The 2.12.0 version of DataWeave introduces these new features and enhancements: Scope Visibility: - DataWeave now supports `private`, `internal`, and `@VisibleTo` annotations for controlling directive access. This enables better code encapsulation and visibility management across DataWeave modules. See [Scope Visibility in DataWeave](https://docs.mulesoft.com/dataweave/latest/dataweave-scope-visibility). Component Metadata: - DataWeave introduces `dw::meta::Component` and related component types for working with component descriptors. This provides enhanced metadata handling capabilities. See [Component (dw::meta::Component)](https://docs.mulesoft.com/dataweave/latest/dw-component) and [Component Types (dw::meta::Component)](https://docs.mulesoft.com/dataweave/latest/dw-component-types). General Improvements: - The [UNLIMITED\_CONTEXT](https://docs.mulesoft.com/dataweave/latest/dw-math-variables) math variable now has the `precision=0` and `roundingMode=HALF_UP` properties. - The [Maven plugin for DataWeave](https://docs.mulesoft.com/dataweave/latest/dataweave-maven-plugin) now includes guidance for configuring cryptographic taint analysis during compilation. - The [DataWeave extension plugin](https://docs.mulesoft.com/dataweave/latest/dataweave-extension-plugin) now provides editor support for scope visibility validation and diagnostics. - DataWeave incorporates new system properties. See [DataWeave System Properties](https://docs.mulesoft.com/dataweave/latest/dataweave-system-properties). ### Compatibility This table specifies which version of DataWeave is bundled with each Mule runtime engine release:
Mule Version DataWeave Version

4.13

2.13

4.12

2.12

4.11

2.11

4.10

2.10

4.9

2.9

4.8

2.8

4.7

2.7

4.6

2.6

4.5

2.5

4.4

2.4

4.3

2.3

4.2

2.2

4.1

2.1

3.9

1.2

3.8

1.1

3.7

1.0
### Fixed Issues The release addresses these DataWeave issues and incorporates all patch updates from the 2.11.0 DataWeave release through May 2026:
Issue Resolution ID

DataWeave now supports the private modifier on fun, var, ns, and type declarations to hide them from importers.

W-21148967

internal is no longer a reserved word and can now be used as an identifier in DataWeave scripts.

W-21508044

The compiler now reports an error when overloads of the same function declare different visibility modifiers.

W-21362539

StackOverflowError no longer occurs in the type checker when resolving intersections of unbound type parameters.

W-20124753

Runtime errors no longer occur when invoking overloaded functions across modules.

W-21811015

Spurious type-check errors no longer occur when an optional key-value pair is assigned to a required one.

W-21351058

deferred values passed to the write function now terminate correctly.

W-20925604

Out-of-memory errors no longer occur when reading large text or CDATA sections with the indexed XML reader.

W-21006104

The Java module bean introspection cache no longer causes memory leaks.

W-22419118
### Upgrade This version of DataWeave is bundled with Mule. DataWeave upgrades take place through Mule. See [Mule Upgrades and Patch Updates](https://docs.mulesoft.com/jp/release-notes/mule-runtime/mule-esb#mule-upgrades). ## [](#see-also)See Also - [Salesforce Help](https://help.salesforce.com) - [MuleSoft Services](https://www.mulesoft.com/support-and-services) - [Troubleshooting a Failing DataWeave Script](https://docs.mulesoft.com/dataweave/latest/dataweave-troubleshoot) - [Known Issues](https://help.salesforce.com/s/issues)