Apache mina connection prevents Tomcat from shutting down

Question

I have the following configuration:

A tomcat7 server running a Spring MVC application which uses Apache mina to connect to a Java-Console application (or any other type of application for that matter) to retrieve some data.

Now obvioisly when i shut down my server, there is still an open session in a seperate Thread preventing Tomcat7 from shutting down. so what i do is the following:

package at.dauzinger.tcpservice;

import javax.servlet.ServletContextEvent;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.*;

public class ServerContextListener implements javax.servlet.ServletContextListener
{
    PriceDao priceDao;

    public void contextDestroyed(ServletContextEvent event)
    {   
        WebApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(event.getServletContext());
        priceDao = (PriceDao)context.getBean("priceDao");
        priceDao.closeConnection();
    }

    public void contextInitialized(ServletContextEvent arg0) {
        //Method Stub
    }
}

And inside the web.xml

<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
   <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
   <listener-class>at.dauzinger.tcpservice.ServerContextListener</listener-class>
</listener>

The ContextListener works, and even my console-application (the server-side of my socket connection) tells me that the session was terminated. But when i'm trying to stop tomcat via the eclipse GUI it fails to shut down and eclipse tells me it isn't reacting and offers me to forcefully terminate the server.

The last logentry form the server is:

Dez 19, 2012 4:39:17 PM org.apache.coyote.AbstractProtocolHandler stop INFO: Stopping ProtocolHandler ["ajp-bio-8009"]

My code running inside the tomcat-servlet:

connector = new NioSocketConnector();
connector.getSessionConfig().setUseReadOperation(true);
connector.getFilterChain().addLast("codec", new ProtocolCodecFilter(new TextLineCodecFactory(Charset.forName("UTF-8"))));
session = connector.connect( new InetSocketAddress(PORT)).awaitUninterruptibly().getSession();

session.write(request);
String resp = (String) session.read().awaitUninterruptibly().getMessage();

Is there any other thread mina launches when opening a connection? What prevents the tomcat instance from shutting down properly?

hi, did you manage to find the root of the problem? I'm having the same issue. — Martin Asenov, Sep 29 '14 at 14:05
Hi, yes i did - but unfortunately that while working as an intern. That means i no longer have acces to the code, sry :( I'll see if i can find anything. — David Auzinger, Sep 30 '14 at 15:09
I'm currently trying to recreate the setup I used with the code I still have, I'll get back to you tomorrow or the day after. — David Auzinger, Sep 30 '14 at 15:33
I may not completely understand what youre doing, but the use of awaitUninterruptibly() is probably at the root of your issue. — Paul Gregoire, Jan 19 '15 at 16:12

score 1 · Answer 1 · answered May 28 '15 at 13:32

I hava the same issue, and I solved it finally, just need to call unbind and dispose when you want to close tomcat.

@PreDestroy
public void close() {
    System.out.println("MINAServer.close");
    if (null != socketAcceptor) {
        socketAcceptor.unbind();
        socketAcceptor.dispose(false);
    }
}

Apache mina connection prevents Tomcat from shutting down

1 Answers1