From ed99050b90ffa3ea733636d9ca683d8c547928bc Mon Sep 17 00:00:00 2001
From: Basil Crow <me@basilcrow.com>
Date: Thu, 28 Oct 2021 10:48:27 -0700
Subject: [PATCH] [JENKINS-66993] Do not register `AntClassLoader` as
 parallel-capable

---
 core/src/main/java/hudson/PluginFirstClassLoader.java | 4 ----
 core/src/main/java/jenkins/util/AntClassLoader.java   | 1 -
 2 files changed, 5 deletions(-)

diff --git a/core/src/main/java/hudson/PluginFirstClassLoader.java b/core/src/main/java/hudson/PluginFirstClassLoader.java
index 51df9e462501..8aee057e7b39 100644
--- a/core/src/main/java/hudson/PluginFirstClassLoader.java
+++ b/core/src/main/java/hudson/PluginFirstClassLoader.java
@@ -42,10 +42,6 @@
 public class PluginFirstClassLoader
     extends AntClassLoader
 {
-    static {
-        registerAsParallelCapable();
-    }
-
     public PluginFirstClassLoader() {
         super(null, false);
     }
diff --git a/core/src/main/java/jenkins/util/AntClassLoader.java b/core/src/main/java/jenkins/util/AntClassLoader.java
index b5326743768e..28b0dea743b2 100644
--- a/core/src/main/java/jenkins/util/AntClassLoader.java
+++ b/core/src/main/java/jenkins/util/AntClassLoader.java
@@ -92,7 +92,6 @@ public class AntClassLoader extends ClassLoader implements JenkinsClassLoader, S
     private static final Object MR_JARFILE_CTOR_RUNTIME_VERSION_VAL;
 
     static {
-        registerAsParallelCapable();
         if (IS_ATLEAST_JAVA9) {
             Class[] ctorArgs = null;
             Object runtimeVersionVal = null;