((ReplicatedMap<?,?>)map).breakdown();

            ((ReplicatedMap<?, ?>) map).breakdown();

- 

package org.apache.catalina.ha.context;

import java.io.File;

import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.catalina.Context;

import org.apache.catalina.Host;

import org.apache.catalina.LifecycleException;

import org.apache.catalina.core.StandardHost;

import org.apache.catalina.startup.Tomcat;

import org.apache.catalina.startup.TomcatBaseTest;

import org.apache.tomcat.util.buf.ByteChunk;

import org.junit.Assert;

import org.junit.Test;

public class TestReplicatedContext extends TomcatBaseTest {

    @Test

    public void testBug57425() throws LifecycleException, IOException, ServletException {

        Tomcat tomcat = getTomcatInstance();

        Host host = tomcat.getHost();

        if (host instanceof StandardHost) {

            ((StandardHost) host).setContextClass(ReplicatedContext.class.getName());

        }

        File root = new File("test/webapp");

        Context context = tomcat.addWebapp(host, "", "", root.getAbsolutePath());

        Tomcat.addServlet(context, "test", new AccessContextServlet());

        context.addServletMapping("/access", "test");

        tomcat.start();

        ByteChunk result = getUrl("http://localhost:" + getPort() + "/access");

        Assert.assertEquals("OK", result.toString());

    }

    private static class AccessContextServlet extends HttpServlet {

        private static final long serialVersionUID = 1L;

        @Override

        protected void doGet(HttpServletRequest req, HttpServletResponse resp)

                throws ServletException, IOException {

            getServletContext().setAttribute("NULL", null);

            resp.getWriter().print("OK");

        }

    }

}