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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Support caching Maven plugin dependencies in setup-java","articleBody":"Description:\nWhen using actions/setup-java@v4 with Maven cache (cache: maven), CI builds often download Maven plugin dependencies (e.g., plexus-*, aircompressor, xz) even when the POM and project dependencies have not changed. The cache log shows: “Cache hit occurred on the primary key …, not saving cache”, so these plugin JARs are not persisted and are downloaded again in subsequent builds.\n\nIt would be helpful to have a way to configure setup-java so that plugin dependencies can also be cached, or otherwise reduce repeated downloads in CI builds.\n\nJustification:\nFor multi-module Maven projects with many plugins, repeated downloads of plugin dependencies increase CI build time and network usage. Providing a way to cache plugin dependencies would make CI runs faster and more efficient, especially on runners that start from a clean environment each time.\n\nAre you willing to submit a PR?\nNo.","author":{"url":"https://github.com/dbi1463","@type":"Person","name":"dbi1463"},"datePublished":"2026-03-19T04:43:47.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/990/setup-java/issues/990"}