[FIX JENKINS-38615] Add user to restart log message

core/src/main/java/hudson/model/UpdateCenter.java

@@ -30,6 +30,7 @@
 import hudson.PluginManager;
 import hudson.PluginWrapper;
 import hudson.ProxyConfiguration;
+import hudson.security.ACLContext;
 import jenkins.util.SystemProperties;
 import hudson.Util;
 import hudson.XmlFile;
@@ -1371,6 +1372,11 @@ public class RestartJenkinsJob extends UpdateCenterJob {
          @Exported(inline=true)
         public volatile RestartJenkinsJobStatus status = new Pending();
 
+        /**
+         * The name of the user that started this job
+         */
+        private String authentication;
+
         /**
          * Cancel job
          */
@@ -1384,6 +1390,7 @@ public synchronized boolean cancel() {
 
         public RestartJenkinsJob(UpdateSite site) {
             super(site);
+            this.authentication = Jenkins.getAuthentication().getName();
         }
 
         public synchronized void run() {
@@ -1392,7 +1399,10 @@ public synchronized void run() {
             }
             status = new Running();
             try {
-                Jenkins.getInstance().safeRestart();
+                // safeRestart records the current authentication for the log, so set it to the managing user
+                try (ACLContext _ = ACL.as(User.get(authentication, false, Collections.emptyMap()))) {
+                    Jenkins.getInstance().safeRestart();
+                }
             } catch (RestartNotSupportedException exception) {
                 // ignore if restart is not allowed
                 status = new Failure();