Added numeric getById to RunMap and deprecate String API

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

@@ -327,7 +327,7 @@ protected Class<R> getBuildClass() {
     }
 
     /**
-     * Backward compatibility method that notifies {@link RunMap} of whom the owner is.
+     * Backward compatibility method that notifies {@link RunMap} of who the owner is.
      * Traditionally, this method blocked and loaded all the build records on the disk,
      * but now all the actual loading happens lazily.
      *

core/src/main/java/jenkins/model/lazy/LazyBuildMixIn.java

@@ -230,7 +230,11 @@
      * Suitable for {@link Job#getBuild}.
      */
     public final RunT getBuild(String id) {
-        return builds.getById(id);
+        try {
+            return builds.getById(Integer.parseInt(id));
+        } catch (NumberFormatException e) {
+            return builds.getById(id);
+        }
     }
 
     /**