Disable frequently failing UrlConnectionFactoryTest#testNoJarFileLeak() on Windows (#2011)

Author: vy

log4j-core-test/src/test/java/org/apache/logging/log4j/core/net/UrlConnectionFactoryTest.java

@@ -56,6 +56,8 @@
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.DisabledOnOs;
+import org.junit.jupiter.api.condition.OS;
 
 /**
  * Tests the UrlConnectionFactory
@@ -141,6 +143,7 @@ private int verifyNotModified(final URI uri, final long lastModifiedMillis) thro
     }
 
     @Test
+    @DisabledOnOs(value = OS.WINDOWS, disabledReason = "Fails frequently on Windows (#2011)")
     public void testNoJarFileLeak() throws Exception {
         ConfigurationSourceTest.prepareJarConfigURL();
         final URL url = new File("target/test-classes/jarfile.jar").toURI().toURL();