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commit bf1c8672f4db158335dfe4ec87a91fea9436f960 Author: Guillaume Nodet <[email protected]> AuthorDate: Thu Jun 25 05:42:20 2026 +0200 Guard JUL bridge installation with isInstalled() check Avoid redundantly removing handlers and reinstalling the SLF4JBridgeHandler on every activateLogging() call, which matters in embedded/resident-mode scenarios where Maven is invoked multiple times in the same JVM. Co-Authored-By: Claude Opus 4.6 <[email protected]> --- .../main/java/org/apache/maven/cling/invoker/LookupInvoker.java | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/impl/maven-cli/src/main/java/org/apache/maven/cling/invoker/LookupInvoker.java b/impl/maven-cli/src/main/java/org/apache/maven/cling/invoker/LookupInvoker.java index 459f1046ef..56c7fb83d7 100644 --- a/impl/maven-cli/src/main/java/org/apache/maven/cling/invoker/LookupInvoker.java +++ b/impl/maven-cli/src/main/java/org/apache/maven/cling/invoker/LookupInvoker.java @@ -429,9 +429,10 @@ protected Consumer<String> doDetermineWriter(C context) { } protected void activateLogging(C context) throws Exception { - // Route java.util.logging (JUL) through SLF4J - SLF4JBridgeHandler.removeHandlersForRootLogger(); - SLF4JBridgeHandler.install(); + if (!SLF4JBridgeHandler.isInstalled()) { + SLF4JBridgeHandler.removeHandlersForRootLogger(); + SLF4JBridgeHandler.install(); + } context.slf4jConfiguration.activate(); if (context.options().failOnSeverity().isPresent()) { String logLevelThreshold = context.options().failOnSeverity().get();
