If a build appears to be hanging for too long, Hudson turns the progress bar to red.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@13041 71c3de6d-444a-0410-be80-ed276b4c234a

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

@@ -12,6 +12,7 @@ import javax.servlet.ServletException;
 import java.io.IOException;
 import java.util.logging.Logger;
 import java.util.logging.Level;
+import java.util.concurrent.TimeUnit;
 
 
 /**
@@ -184,6 +185,29 @@ public class Executor extends Thread implements ModelObject {
         return num;
     }
 
+    /**
+     * Returns true if the current build is likely stuck.
+     *
+     * <p>
+     * This is a heuristics based approach, but if the build is suspiciously taking for a long time,
+     * this method returns true.
+     */
+    @Exported
+    public boolean isLikelyStuck() {
+        Queue.Executable e = executable;
+        if(e==null)     return false;
+
+        long elapsed = System.currentTimeMillis() - startTime;
+        long d = e.getParent().getEstimatedDuration();
+        if(d>=0) {
+            // if it's taking 10 times longer than ETA, consider it stuck
+            return d*10 < elapsed;
+        } else {
+            // if no ETA is available, a build taking longer than a day is considered stuck
+            return TimeUnit.MILLISECONDS.toHours(elapsed)>24;
+        }
+    }
+
     /**
      * Computes a human-readable text that shows the expected remaining time
      * until the build completes.

core/src/main/resources/lib/hudson/buildProgressBar.jelly

@@ -6,5 +6,6 @@
 -->
 <j:jelly xmlns:j="jelly:core" xmlns:x="jelly:xml" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
   <t:progressBar tooltip="${%text(build.timestampString,build.executor.estimatedRemainingTime)}"
+                 red="${build.executor.isLikelyStuck()}"
                  pos="${build.executor.progress}" href="${rootURL}/${build.url}console"/>
 </j:jelly>