[FIXED JENKINS-17401] Behave gracefully if the user tries to rename a job using the Apply button.

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

@@ -54,6 +54,7 @@ import hudson.util.DescribableList;
 import hudson.util.FormApply;
 import hudson.util.Graph;
 import hudson.util.ProcessTree;
+import hudson.util.QuotedStringTokenizer;
 import hudson.util.RunList;
 import hudson.util.ShiftedCategoryAxis;
 import hudson.util.StackedAreaRenderer2;
@@ -1144,7 +1145,11 @@ public abstract class Job<JobT extends Job<JobT, RunT>, RunT extends Run<JobT, R
                 // check this error early to avoid HTTP response splitting.
                 Jenkins.checkGoodName(newName);
                 namingStrategy.checkName(newName);
-                rsp.sendRedirect("rename?newName=" + URLEncoder.encode(newName, "UTF-8"));
+                if (FormApply.isApply(req)) {
+                    FormApply.applyResponse("notificationBar.show(" + QuotedStringTokenizer.quote(Messages.Job_you_must_use_the_save_button_if_you_wish()) + ",notificationBar.WARNING)").generateResponse(req, rsp, null);
+                } else {
+                    rsp.sendRedirect("rename?newName=" + URLEncoder.encode(newName, "UTF-8"));
+                }
             } else {
                 if(namingStrategy.isForceExistingJobs()){
                     namingStrategy.checkName(name);

core/src/main/resources/hudson/model/Messages.properties

@@ -182,6 +182,7 @@ Job.NoRecentBuildFailed=No recent builds failed.
 Job.Pronoun=Project
 Job.minutes=mins
 
+Job.you_must_use_the_save_button_if_you_wish=You must use the Save button if you wish to rename a job.
 Label.GroupOf=group of {0}
 Label.InvalidLabel=invalid label
 Label.ProvisionedFrom=Provisioned from {0}