diff --git a/core/src/main/java/hudson/lifecycle/Lifecycle.java b/core/src/main/java/hudson/lifecycle/Lifecycle.java
index 6f77bd51ef1d2e408dbed3bff7e499ce68aea944..63f97bd13179490ee298f6d036b2a519092bfdfd 100644
--- a/core/src/main/java/hudson/lifecycle/Lifecycle.java
+++ b/core/src/main/java/hudson/lifecycle/Lifecycle.java
@@ -6,6 +6,9 @@ import hudson.model.Hudson;
 import java.io.File;
 import java.io.IOException;
 
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.io.FileUtils;
+
 /**
  * Provides the capability for starting/stopping/restarting/uninstalling Hudson.
  *
@@ -72,9 +75,19 @@ public abstract class Lifecycle implements ExtensionPoint {
 
     /**
      * Replaces hudson.war by the given file.
+     *
+     * <p>
+     * On some system, most notably Windows, a file being in use cannot be changed,
+     * so rewriting <tt>hudson.war</tt> requires some special trick. Override this method
+     * to do so.
      */
     public void rewriteHudsonWar(File by) throws IOException {
-        throw new UnsupportedOperationException();
+        File dest = getHudsonWar();
+        // this should be impossible given the canRewriteHudsonWar method,
+        // but let's be defensive
+        if(dest==null)  throw new IOException("hudson.war location is not known.");
+
+        FileUtils.copyFile(by, dest);
     }
 
     /**
@@ -82,8 +95,7 @@ public abstract class Lifecycle implements ExtensionPoint {
      */
     public boolean canRewriteHudsonWar() {
         // if we don't know where hudson.war is, it's impossible to replace.
-        if(getHudsonWar()==null)    return false;
-        return isOverridden("rewriteHudsonWar",File.class);
+        return getHudsonWar()!=null;
     }
 
     private boolean isOverridden(String methodName, Class... types) {
diff --git a/core/src/main/java/hudson/lifecycle/SolarisSMFLifecycle.java b/core/src/main/java/hudson/lifecycle/SolarisSMFLifecycle.java
new file mode 100644
index 0000000000000000000000000000000000000000..3bb17f5289c6954e6dbf506eef61a173df0b0f6b
--- /dev/null
+++ b/core/src/main/java/hudson/lifecycle/SolarisSMFLifecycle.java
@@ -0,0 +1,18 @@
+package hudson.lifecycle;
+
+import java.io.IOException;
+
+/**
+ * {@link Lifecycle} for Hudson installed as SMF service.
+ *
+ * @author Kohsuke Kawaguchi
+ */
+public class SolarisSMFLifecycle extends Lifecycle {
+    /**
+     * In SMF managed environment, just commit a suicide and the service will be restarted by SMF.
+     */
+    @Override
+    public void restart() throws IOException, InterruptedException {
+        System.exit(0);
+    }
+}
diff --git a/core/src/main/java/hudson/lifecycle/WindowsServiceLifecycle.java b/core/src/main/java/hudson/lifecycle/WindowsServiceLifecycle.java
index 6e1f58733757cc0646a53bfcbed086e2f9f9f338..f92e79b37ada94ff0bad58e9a7f14a60b4b1c683 100644
--- a/core/src/main/java/hudson/lifecycle/WindowsServiceLifecycle.java
+++ b/core/src/main/java/hudson/lifecycle/WindowsServiceLifecycle.java
@@ -57,6 +57,10 @@ public class WindowsServiceLifecycle extends Lifecycle {
         }
     }
 
+    /**
+     * On Windows, hudson.war is locked, so we place a new version under a special name,
+     * which is picked up by the service wrapper upon restart.
+     */
     @Override
     public void rewriteHudsonWar(File by) throws IOException {
         File rootDir = Hudson.getInstance().getRootDir();
@@ -67,6 +71,7 @@ public class WindowsServiceLifecycle extends Lifecycle {
         w.close();
     }
 
+    @Override
     public void restart() throws IOException, InterruptedException {
         File me = getHudsonWar();
         File home = me.getParentFile();