[FIXED JENKINS-33384] clean up the PluginServletFilter instances on Jenkins.cleanUp()

(cherry picked from commit abf9fd3)

Author: stephenc

core/src/main/java/hudson/util/PluginServletFilter.java

@@ -42,6 +42,8 @@
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import org.kohsuke.accmod.Restricted;
+import org.kohsuke.accmod.restrictions.NoExternalUse;
 
 /**
  * Servlet {@link Filter} that chains multiple {@link Filter}s, provided by plugins
@@ -142,5 +144,25 @@ public void destroy() {
         list.clear();
     }
 
+    @Restricted(NoExternalUse.class)
+    public static void cleanUp() {
+        PluginServletFilter instance = getInstance(Jenkins.getInstance().servletContext);
+        if (instance != null) {
+            for (Iterator<Filter> iterator = instance.list.iterator(); iterator.hasNext(); ) {
+                Filter f = iterator.next();
+                try {
+                    f.destroy();
+                } catch (RuntimeException e) {
+                    LOGGER.log(Level.WARNING, "Filter " + f + " propagated an exception from its destroy method", e);
+                } catch (Error e) {
+                    throw e; // we are not supposed to catch errors, don't log as could be an OOM
+                } catch (Throwable e) {
+                    LOGGER.log(Level.SEVERE, "Filter " + f + " propagated an exception from its destroy method", e);
+                }
+                iterator.remove();
+            }
+        }
+    }
+
     private static final Logger LOGGER = Logger.getLogger(PluginServletFilter.class.getName());
 }

core/src/main/java/jenkins/model/Jenkins.java

@@ -178,6 +178,7 @@
 import hudson.util.Memoizer;
 import hudson.util.MultipartFormDataParser;
 import hudson.util.NamingThreadFactory;
+import hudson.util.PluginServletFilter;
 import hudson.util.RemotingDiagnostics;
 import hudson.util.RemotingDiagnostics.HeapDump;
 import hudson.util.TextFile;
@@ -2882,6 +2883,8 @@ public void run() {
                 LOGGER.log(Level.WARNING, "Failed to shut down properly",e);
             }
 
+        PluginServletFilter.cleanUp();
+
         LogFactory.releaseAll();
 
         theInstance = null;