diff --git a/apache-jsp/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration b/apache-jsp/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
deleted file mode 100644
index 5a52ca4a8ef..00000000000
--- a/apache-jsp/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
+++ /dev/null
@@ -1 +0,0 @@
-org.eclipse.jetty.webapp.JspConfiguration
diff --git a/jetty-jaas/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration b/jetty-jaas/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
deleted file mode 100644
index bcd8f3b50dc..00000000000
--- a/jetty-jaas/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
+++ /dev/null
@@ -1 +0,0 @@
-org.eclipse.jetty.webapp.JaasConfiguration
diff --git a/jetty-jndi/pom.xml b/jetty-jndi/pom.xml
index de213dd80fb..ab90b181e80 100644
--- a/jetty-jndi/pom.xml
+++ b/jetty-jndi/pom.xml
@@ -31,13 +31,6 @@
           </instructions>
         </configuration>
       </plugin>
-      <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>findbugs-maven-plugin</artifactId>
-        <configuration>
-          <onlyAnalyze>org.eclipse.jetty.jndi.*</onlyAnalyze>
-        </configuration>
-      </plugin>
     </plugins>
   </build>
   <dependencies>
diff --git a/jetty-jndi/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration b/jetty-jndi/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
deleted file mode 100644
index c77d2abdd26..00000000000
--- a/jetty-jndi/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
+++ /dev/null
@@ -1 +0,0 @@
-org.eclipse.jetty.webapp.JndiConfiguration
diff --git a/jetty-servlets/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration b/jetty-servlets/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
deleted file mode 100644
index 990aa4e2f8b..00000000000
--- a/jetty-servlets/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
+++ /dev/null
@@ -1 +0,0 @@
-org.eclipse.jetty.webapp.ServletsConfiguration
diff --git a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JaasConfiguration.java b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JaasConfiguration.java
index 85e7130fa71..8fbb3e4c3d2 100644
--- a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JaasConfiguration.java
+++ b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JaasConfiguration.java
@@ -20,6 +20,10 @@ package org.eclipse.jetty.webapp;
 
 import java.util.ServiceLoader;
 
+import org.eclipse.jetty.util.Loader;
+import org.eclipse.jetty.util.log.Log;
+import org.eclipse.jetty.util.log.Logger;
+
 /**
  * <p>JAAS Configuration</p>
  * <p>This configuration configures the WebAppContext server/system classes to
@@ -32,10 +36,26 @@ import java.util.ServiceLoader;
  */
 public class JaasConfiguration extends AbstractConfiguration
 {
+    private static final Logger LOG = Log.getLogger(JaasConfiguration.class);
+
     public JaasConfiguration()
     {
         addDependencies(WebXmlConfiguration.class, MetaInfConfiguration.class, WebInfConfiguration.class, FragmentConfiguration.class);
         addDependents(WebAppConfiguration.class);
         protectAndExpose("org.eclipse.jetty.jaas.");
     }
+
+    @Override
+    public boolean isAvailable()
+    {
+        try
+        {
+            return Loader.loadClass("org.eclipse.jetty.jaas.JAASLoginService")!=null;
+        }
+        catch (Throwable e)
+        {
+            LOG.ignore(e);
+            return false;
+        }
+    }
 }
diff --git a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JmxConfiguration.java b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JmxConfiguration.java
index c6d166d6146..76171590135 100644
--- a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JmxConfiguration.java
+++ b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JmxConfiguration.java
@@ -18,12 +18,12 @@
 
 package org.eclipse.jetty.webapp;
 
+import java.util.ServiceLoader;
+
 import org.eclipse.jetty.util.Loader;
 import org.eclipse.jetty.util.log.Log;
 import org.eclipse.jetty.util.log.Logger;
 
-import java.util.ServiceLoader;
-
 /**
  * <p>JMX Configuration</p>
  * <p>This configuration configures the WebAppContext server/system classes to
@@ -55,7 +55,7 @@ public class JmxConfiguration extends AbstractConfiguration
         catch (Throwable e)
         {
             LOG.ignore(e);
+            return false;
         }
-        return false;
     }
 }
diff --git a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JndiConfiguration.java b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JndiConfiguration.java
index cb3c52d60db..ca726597402 100644
--- a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JndiConfiguration.java
+++ b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JndiConfiguration.java
@@ -20,6 +20,10 @@ package org.eclipse.jetty.webapp;
 
 import java.util.ServiceLoader;
 
+import org.eclipse.jetty.util.Loader;
+import org.eclipse.jetty.util.log.Log;
+import org.eclipse.jetty.util.log.Logger;
+
 /**
  * <p>JNDI Configuration</p>
  * <p>This configuration configures the WebAppContext system/server classes to
@@ -32,10 +36,26 @@ import java.util.ServiceLoader;
  */
 public class JndiConfiguration extends AbstractConfiguration
 {
+    private static final Logger LOG = Log.getLogger(JndiConfiguration.class);
+
     public JndiConfiguration()
     {
         addDependencies(WebXmlConfiguration.class, MetaInfConfiguration.class, WebInfConfiguration.class, FragmentConfiguration.class);
         addDependents(WebAppConfiguration.class);
         protectAndExpose("org.eclipse.jetty.jndi.");
     }
+
+    @Override
+    public boolean isAvailable()
+    {
+        try
+        {
+            return Loader.loadClass("org.eclipse.jetty.jndi.InitialContextFactory")!=null;
+        }
+        catch (Throwable e)
+        {
+            LOG.ignore(e);
+            return false;
+        }
+    }
 }
diff --git a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JspConfiguration.java b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JspConfiguration.java
index ea9827fdb9b..0e59f929ee8 100644
--- a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JspConfiguration.java
+++ b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/JspConfiguration.java
@@ -20,6 +20,10 @@ package org.eclipse.jetty.webapp;
 
 import java.util.ServiceLoader;
 
+import org.eclipse.jetty.util.Loader;
+import org.eclipse.jetty.util.log.Log;
+import org.eclipse.jetty.util.log.Logger;
+
 /**
  * <p>JSP Configuration</p>
  * <p>This configuration configures the WebAppContext server/system classes to
@@ -33,6 +37,8 @@ import java.util.ServiceLoader;
  */
 public class JspConfiguration extends AbstractConfiguration
 {
+    private static final Logger LOG = Log.getLogger(JspConfiguration.class);
+
     public JspConfiguration()
     {
         addDependencies(WebXmlConfiguration.class, MetaInfConfiguration.class, WebInfConfiguration.class, FragmentConfiguration.class);
@@ -41,4 +47,18 @@ public class JspConfiguration extends AbstractConfiguration
         expose("org.eclipse.jetty.apache.");
         hide("org.eclipse.jdt.");
     }
+
+    @Override
+    public boolean isAvailable()
+    {
+        try
+        {
+            return Loader.loadClass("org.eclipse.jetty.jsp.JettyJspServlet")!=null;
+        }
+        catch (Throwable e)
+        {
+            LOG.ignore(e);
+            return false;
+        }
+    }
 }
diff --git a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/ServletsConfiguration.java b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/ServletsConfiguration.java
index 2a6eb3961c0..3f4b6ac37f0 100644
--- a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/ServletsConfiguration.java
+++ b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/ServletsConfiguration.java
@@ -18,6 +18,10 @@
 
 package org.eclipse.jetty.webapp;
 
+import org.eclipse.jetty.util.Loader;
+import org.eclipse.jetty.util.log.Log;
+import org.eclipse.jetty.util.log.Logger;
+
 /**
  * <p>Jetty Servlets Configuration</p>
  * <p>This configuration configures the WebAppContext server/system classes to
@@ -27,6 +31,8 @@ package org.eclipse.jetty.webapp;
  */
 public class ServletsConfiguration extends AbstractConfiguration
 {
+    private static final Logger LOG = Log.getLogger(ServletsConfiguration.class);
+
     public ServletsConfiguration()
     {
         addDependencies(WebXmlConfiguration.class, MetaInfConfiguration.class, WebInfConfiguration.class, WebAppConfiguration.class);
@@ -37,4 +43,18 @@ public class ServletsConfiguration extends AbstractConfiguration
                 );
         expose("org.eclipse.jetty.servlets."); // don't hide jetty servlets
     }
+
+    @Override
+    public boolean isAvailable()
+    {
+        try
+        {
+            return Loader.loadClass("org.eclipse.jetty.servlets.PushCacheFilter")!=null;
+        }
+        catch (Throwable e)
+        {
+            LOG.ignore(e);
+            return false;
+        }
+    }
 }
diff --git a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebSocketConfiguration.java b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebSocketConfiguration.java
index 7f6c343dca9..5a5b2852575 100644
--- a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebSocketConfiguration.java
+++ b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebSocketConfiguration.java
@@ -20,6 +20,10 @@ package org.eclipse.jetty.webapp;
 
 import java.util.ServiceLoader;
 
+import org.eclipse.jetty.util.Loader;
+import org.eclipse.jetty.util.log.Log;
+import org.eclipse.jetty.util.log.Logger;
+
 /**
  * <p>Websocket Configuration</p>
  * <p>This configuration configures the WebAppContext server/system classes to
@@ -32,10 +36,26 @@ import java.util.ServiceLoader;
  */
 public class WebSocketConfiguration extends AbstractConfiguration
 {
+    private static final Logger LOG = Log.getLogger(WebSocketConfiguration.class);
+
     public WebSocketConfiguration()
     {
         addDependencies(WebXmlConfiguration.class, MetaInfConfiguration.class, WebInfConfiguration.class, FragmentConfiguration.class);
         addDependents("org.eclipse.jetty.annotations.AnnotationConfiguration", WebAppConfiguration.class.getName());
         protectAndExpose("org.eclipse.jetty.websocket.");
     }
+
+    @Override
+    public boolean isAvailable()
+    {
+        try
+        {
+            return Loader.loadClass("org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter")!=null;
+        }
+        catch (Throwable e)
+        {
+            LOG.ignore(e);
+            return false;
+        }
+    }
 }
diff --git a/jetty-webapp/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration b/jetty-webapp/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
index 377ae88c198..b4e19283421 100644
--- a/jetty-webapp/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
+++ b/jetty-webapp/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
@@ -1,7 +1,12 @@
 org.eclipse.jetty.webapp.FragmentConfiguration
 org.eclipse.jetty.webapp.JettyWebXmlConfiguration
-org.eclipse.jetty.webapp.MetaInfConfiguration
-org.eclipse.jetty.webapp.WebInfConfiguration
-org.eclipse.jetty.webapp.WebXmlConfiguration
-org.eclipse.jetty.webapp.WebAppConfiguration
+org.eclipse.jetty.webapp.JaasConfiguration
 org.eclipse.jetty.webapp.JmxConfiguration
+org.eclipse.jetty.webapp.JndiConfiguration
+org.eclipse.jetty.webapp.JspConfiguration
+org.eclipse.jetty.webapp.MetaInfConfiguration
+org.eclipse.jetty.webapp.ServletsConfiguration
+org.eclipse.jetty.webapp.WebAppConfiguration
+org.eclipse.jetty.webapp.WebInfConfiguration
+org.eclipse.jetty.webapp.WebSocketConfiguration
+org.eclipse.jetty.webapp.WebXmlConfiguration
diff --git a/jetty-websocket/websocket-server/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration b/jetty-websocket/websocket-server/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
deleted file mode 100644
index e1e4eb72b96..00000000000
--- a/jetty-websocket/websocket-server/src/main/resources/META-INF/services/org.eclipse.jetty.webapp.Configuration
+++ /dev/null
@@ -1 +0,0 @@
-org.eclipse.jetty.webapp.WebSocketConfiguration