[FIXED JENKINS-24161] Break recursion in UpstreamCause.onLoad.

changelog.html

@@ -67,6 +67,9 @@
   <li class="bug">
     Improving security of <code>set-build-parameter</code> and <code>set-build-result</code> CLI commands.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-24080">issue 24080</a>)
+  <li class="bug">
+    Startup can be broken by deeply recursive causes in build records.
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-24161">issue 24161</a>)
   <li class="rfe">
     Added support for host:port format in X-Forwarded-Host header.
     (<a href="https://github.com/jenkinsci/jenkins/commit/19d8b80bb2f33e4877c7170bcca8bfa318ebe77d">commit 19d8b80</a>)

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

@@ -98,6 +98,13 @@ public void onLoad(@Nonnull Run<?,?> build) {
         }
     }
 
+    void onLoad(@Nonnull Job<?,?> job, int buildNumber) {
+        Run<?,?> build = job.getBuildByNumber(buildNumber);
+        if (build != null) {
+            onLoad(build);
+        }
+    }
+
     @Deprecated
     public void onLoad(AbstractBuild<?,?> build) {
         if (Util.isOverridden(Cause.class, getClass(), "onLoad", Run.class)) {
@@ -178,22 +185,16 @@ private UpstreamCause(String upstreamProject, int upstreamBuild, String upstream
         }
 
         @Override
-        public void onLoad(@Nonnull Run run) {
+        public void onLoad(@Nonnull Job<?,?> _job, int _buildNumber) {
             Item i = Jenkins.getInstance().getItemByFullName(this.upstreamProject);
             if (i == null || !(i instanceof Job)) {
                 // cannot initialize upstream causes
                 return;
             }
 
             Job j = (Job)i;
-            Run r = j.getBuildByNumber(this.getUpstreamBuild());
-            if (r == null) {
-                // build doesn't exist anymore
-                return;
-            }
-
             for (Cause c : this.upstreamCauses) {
-                c.onLoad(r);
+                c.onLoad(j, upstreamBuild);
             }
         }
 
@@ -349,6 +350,7 @@ private void print(TaskListener listener, int depth) {
             @Override public String toString() {
                 return "JENKINS-14814";
             }
+            @Override public void onLoad(@Nonnull Job<?,?> _job, int _buildNumber) {}
         }
 
     }