Fix: Mockito inline mock maker failing on JDK 21#10946
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wmontwe merged 1 commit intothunderbird:mainfrom Apr 30, 2026
Merged
Fix: Mockito inline mock maker failing on JDK 21#10946wmontwe merged 1 commit intothunderbird:mainfrom
wmontwe merged 1 commit intothunderbird:mainfrom
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Could not initialize inline Byte Buddy mock maker. Could not self-attach to current VM using external process This affects all JVM library modules using the `thunderbird.library.jvm` plugin. Fix: Add JVM args `-XX:+EnableDynamicAgentLoading` and `-Djdk.attach.allowAttachSelf=true` to the `thunderbird.library.jvm` convention plugin so all JVM modules allow Mockito's ByteBuddy agent to self-attach when running tests on JDK 17+. Testing: Verified all JVM module tests pass with this fix on JDK 21.
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Problem
Running tests on JDK 21 fails with:
Could not initialize inline Byte Buddy mock maker.Could not self-attach to current VM using external processThis affects all JVM library modules using the
thunderbird.library.jvmplugin.Fix
Add JVM args
-XX:+EnableDynamicAgentLoadingand-Djdk.attach.allowAttachSelf=trueto thethunderbird.library.jvmconvention plugin so all JVM modules allow Mockito's ByteBuddy agent
to self-attach when running tests on JDK 17+.
Testing
Verified all JVM module tests pass with this fix on JDK 21.