Re: Problem shutting down activemq client with failover transport

[Ganesh Murthy]

Can you please provide a thread dump? That would throw some light on exactly 
what is going on.

Thanks.

----- Original Message -----
From: "Anna Maier" <a.ma...@topdesk.com>
To: users@activemq.apache.org
Sent: Tuesday, September 29, 2015 9:31:13 AM
Subject: Problem shutting down activemq client with failover transport

Hi,



I am using Camel to connect to ActiveMQ and it fails to shutdown when the 
ActiveMQComponent cannot make a connection to the broker with the failover 
protocol (activemq version 5.12.0).

The problem seems to be that the failover transport tries to connect to the 
broker in an endless loop on its own thread that cannot be interrupted. I think 
the problem is in the PooledTaskRunner: there is a shutdown field which is set 
to true when camel shuts down, but it appears as false to the thread that is 
running the endless loop.



I am currently at a loss what to do. I want to keep the maximum retries setting 
for the failover transport on indefinite, since I do not know when the the 
broker is back online. At the same time, it has to be possible to shut down the 
application even if there never was a connection to the ActiveMQ broker.



Has anybody seen this problem before and can give some advice? Is this a bug in 
ActiveMQ?



Attached there is some code that reproduces the problem - it never terminates.



Regards,

Anna



The code:
public class ShutdownBug {

     public static void main(String[] args) throws Exception {
         DefaultCamelContext camelContext = new DefaultCamelContext();
         ActiveMQComponent activeMQComponent = new ActiveMQComponent();
          activeMQComponent.setBrokerURL("failover:(http://localhost:61616)");
         camelContext.addComponent("activemq", activeMQComponent);
         camelContext.addRoutes(new RouteBuilder() {
              @Override
              public void configure() {
                   from("activemq:queue:myqueue").to("stream:out");
              }
         });
         Thread startThread = new Thread(new Runnable() {
              @Override
              public void run() {
                   try {
                        camelContext.start();
                   }
                   catch (Exception e) {
                        e.printStackTrace();
                   }
              }
         });
         startThread.start();
         startThread.interrupt();
         startThread.join();
         camelContext.stop();
     }

}