[FIXED JENKINS-15156] Initialize AbstractLazyLoadRunMap.dir for newly created jobs

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

@@ -162,7 +162,7 @@ public abstract class AbstractProject<P extends AbstractProject<P,R>,R extends A
      * {@link Run#getPreviousBuild()}
      */
     @Restricted(NoExternalUse.class)
-    protected transient RunMap<R> builds = new RunMap<R>();
+    protected transient RunMap<R> builds;
 
     /**
      * The quiet period. Null to delegate to the system default.
@@ -271,6 +271,12 @@ public abstract class AbstractProject<P extends AbstractProject<P,R>,R extends A
         super.onCreatedFromScratch();
         // solicit initial contributions, especially from TransientProjectActionFactory
         updateTransientActions();
+        assert builds==null;
+        builds = new RunMap<R>(getBuildDir(), new Constructor<R>() {
+            public R create(File dir) throws IOException {
+        	return loadBuild(dir);
+            }
+        });
     }
 
     @Override

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

@@ -203,8 +203,8 @@ public abstract class AbstractLazyLoadRunMap<R> extends AbstractMap<Integer,R> i
     private void loadIdOnDisk() {
         String[] buildDirs = dir.list(createDirectoryFilter());
         if (buildDirs==null) {
+            // the job may just have been created
             buildDirs=EMPTY_STRING_ARRAY;
-            LOGGER.log(Level.WARNING, "failed to load list of builds from {0}", dir);
         }
         // wrap into ArrayList to enable mutation
         Arrays.sort(buildDirs);
@@ -625,6 +625,7 @@ public abstract class AbstractLazyLoadRunMap<R> extends AbstractMap<Integer,R> i
 
 
     protected R load(String id, Index editInPlace) {
+        assert dir != null;
         R v = load(new File(dir, id), editInPlace);
         if (v==null && editInPlace!=null) {
             // remember the failure.