[JENKINS-42670] - Fix the potential File descriptor leak in the Windows Service installer

core/src/main/java/hudson/lifecycle/WindowsInstallerLink.java

@@ -306,9 +306,9 @@ public class WindowsInstallerLink extends ManagementLink {
         try {
             return Kernel32Utils.waitForExitProcess(sei.hProcess);
         } finally {
-            FileInputStream fin = new FileInputStream(new File(pwd,"redirect.log"));
-            IOUtils.copy(fin, out.getLogger());
-            fin.close();
+            try (FileInputStream fin = new FileInputStream(new File(pwd,"redirect.log"))) {
+                IOUtils.copy(fin, out.getLogger());
+            }
         }
     }