Resolved Gradle Build Failed (2021.3.5f1, lambda expressions are not supported in -source 1.7)

Hi !

Since we updated our project to 2021.3.5f1, we have the error below while building on Android.
We did not have issue on 2021.1.28f1.
If I remove the UnityMobileNotification package (containing the lambda expression not supported), the build succeed.

It looks like the version of the JDK used during the build process is not recent enough.
In the Preferences -> External Tools, the JDK used is the one recommended (the one from 2021.3.5f1 : OpenJDK 1.8.0_152).

Do you have any clue of the origin of this issue?

Thanks!

Console:

CommandInvokationFailure: Gradle build failed.
/Applications/Unity/Hub/Editor/2021.3.5f1/PlaybackEngines/AndroidPlayer/OpenJDK/bin/java -classpath "/Applications/Unity/Hub/Editor/2021.3.5f1/PlaybackEngines/AndroidPlayer/Tools/gradle/lib/gradle-launcher-6.1.1.jar" org.gradle.launcher.GradleMain "-Dorg.gradle.jvmargs=-Xmx8192m" "assembleRelease"
stderr[
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
/Users/MyProject/Library/Bee/Android/Prj/IL2CPP/Gradle/unityLibrary/src/main/java/com/unity/androidnotifications/UnityNotificationManager.java:376: error: lambda expressions are not supported in -source 1.7
Thread housekeepingThread = new Thread(() -> {
^
(use -source 8 or higher to enable lambda expressions)
1 error
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':unityLibrary:compileReleaseJavaWithJavac'.
> Compilation failed; see the compiler error output for details.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 5m 21s

 

Some more news about the issue :
- the problem is not local (other computers with the same project have the same build failure)
- build is working on iOS
- an build android on a separate project with only the notification package on 2021.3.5f1 is working


More logs during the build process :

Done: apply plugin: 'com.android.application'
dependencies {
implementation project(':unityLibrary')
}
android {
compileSdkVersion 31
buildToolsVersion '30.0.2'
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
defaultConfig {
minSdkVersion 22
targetSdkVersion 31
applicationId 'XXXX'
ndk {
abiFilters 'armeabi-v7a', 'arm64-v8a'
}
versionCode XXXXX
versionName 'XXXXX'
multiDexEnabled true
}
aaptOptions {
noCompress = ['.unity3d', '.ress', '.resource', '.obb', '.bundle', '.unityexp'] + unityStreamingAssets.tokenize(', ')
ignoreAssetsPattern = "!.svn:!.git:!.ds_store:!*.scc:.*:!CVS:!thumbs.db:!picasa.ini:!*~"
}
signingConfigs {
release {
[...] (some keystore info here)
}
}
lintOptions {
abortOnError false
}
buildTypes {
debug {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt')
signingConfig signingConfigs.release
jniDebuggable true
}
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt')
signingConfig signingConfigs.release
}
}
packagingOptions {
doNotStrip '*/armeabi-v7a/*.so'
doNotStrip '*/arm64-v8a/*.so'
}
bundle {
language {
enableSplit = false
}
density {
enableSplit = false
}
abi {
enableSplit = true
}
}
}

 

Issue solved :

We used both a custom mainTemplate.gradle and launcherTemplate.gradle.
CompileOptions were correctly set on the launcherTemplate, but missing on the mainTemplate.
Adding those lines on the mainTemplate.gradle solved the issue.

Code (CSharp):

1. compileOptions
2. {
3. sourceCompatibility JavaVersion.VERSION_1_8
4. targetCompatibility JavaVersion.VERSION_1_8
5. }

 

when I change sourceCompatibility to JavaVersion.VERSION_1_8, it keeps going back to JavaVersion.VERSION_1_7 when I hit build

 

Same problem. Has anyone already solved this?
Unity editor 2021.3.8.f1

 

I had to upgrade Unity editor to a newer version (2021.3.18.f1) to get this resolved

 

Same. Thanks!