DataWeave 2.10.0 Release Notes

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For more detail, see DataWeave Language.

November 4, 2025

DataWeave 2.10.1 is bundled with the Mule 4.10.1 release. The Mule patch release addresses these DataWeave issues:

Issue Resolution ID

Issue Resolution	ID
Materialization errors no longer occur in run function.	W-19884071
The org.apache.commons:commons-lang3 library is upgraded to 3.18.	W-19803454
Single variable materialization now works correctly for `unsafe` and `exists` selectors.	W-19581017
The SnakeYAML library is upgraded.	W-19749213
Each variable is now extracted from vars to manage materialization individually.	W-19580992
The `--` operator now returns the correct type without the subtracted keys.	W-19595907
Debug logging is now enabled for `DefaultLoggingService`.	W-19650046
The `take` function no longer fails in streaming mode when `n` is larger than the array length.	W-19168279
The Java Module now supports object field access with different capitalizations.	W-19477334
The Runtime Compiler now uses the Parser Manager to look for resources provided as parameters.	W-19376888
A null check is now performed before closing the `InputStream`.	W-19395982
Parsing metrics printing now includes a missing line ending.	W-19440583
Constants are now used to prevent incorrect loader identifiers for binary compiled scripts.	W-18455133
Generated POM files now include license information.	W-19439330
`SchemaProvider` resolution on Types is improved to prevent Execution reference leaks.	W-19389019
The classloader weave resource resolver now uses the correct path in Windows environments.	W-19407283

Materialization errors no longer occur in run function.

W-19884071

The org.apache.commons:commons-lang3 library is upgraded to 3.18.

W-19803454

Single variable materialization now works correctly for unsafe and exists selectors.

W-19581017

The SnakeYAML library is upgraded.

W-19749213

Each variable is now extracted from vars to manage materialization individually.

W-19580992

The -- operator now returns the correct type without the subtracted keys.

W-19595907

Debug logging is now enabled for DefaultLoggingService.

W-19650046

The take function no longer fails in streaming mode when n is larger than the array length.

W-19168279

The Java Module now supports object field access with different capitalizations.

W-19477334

The Runtime Compiler now uses the Parser Manager to look for resources provided as parameters.

W-19376888

A null check is now performed before closing the InputStream.

W-19395982

Parsing metrics printing now includes a missing line ending.

W-19440583

Constants are now used to prevent incorrect loader identifiers for binary compiled scripts.

W-18455133

Generated POM files now include license information.

W-19439330

SchemaProvider resolution on Types is improved to prevent Execution reference leaks.

W-19389019

The classloader weave resource resolver now uses the correct path in Windows environments.

W-19407283

For details about the Mule release and patch updates, see Mule Runtime Engine 4.10.0 Release Notes.

October 2, 2025

DataWeave 2.10.0 is bundled with the Mule 4.10.0 release. For details about the Mule release, see Mule Runtime Engine 4.10.0 Release Notes.

What’s New

The 2.10.0 version of DataWeave introduces the following new features and enhancements:

DataWeave Logging Configuration:

You can now configure DataWeave logging to control log levels and improve debugging and monitoring. See DataWeave Logging Configuration for details.

DataWeave module features:

The logDebug function (logDebug) is new.
The logError function (logError) is new.
The logInfo function (logInfo) is new.
The logWarn function (logWarn) is new.
The logWith function (logWith) is new.
The decimalAdd function (decimalAdd) is new.
The decimalDivide function (decimalDivide) is new.
The decimalMultiply function (decimalMultiply) is new.
The decimalPow function (decimalPow) is new.
The decimalRound function (decimalRound) is new.
The decimalSqrt function (decimalSqrt) is new.
The decimalSubtract function (decimalSubtract) is new.
The Math Types (Math Types) are new.

General improvements:

DataWeave incorporates new system properties. See DataWeave System Properties.
DataWeave now supports Avro primitive types as top-level schema elements. See Avro Format.

Compatibility

The following table specifies which version of DataWeave is bundled with each Mule runtime engine release:

Mule Version	DataWeave Version
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 2.9.0 DataWeave release through September 2025:

Issue Resolution ID

Issue Resolution	ID
The `take` function now works with streaming when argument is larger than the array length.	W-19168279
`java-module` now supports object fields access when using different capitalizations.	W-19477334

The take function now works with streaming when argument is larger than the array length.

W-19168279

java-module now supports object fields access when using different capitalizations.