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From Daniel Laügt (JIRA) <j...@apache.org>
Subject [jira] [Created] (AMQCPP-491) Connection didn't switch to the slave broker when the master broker is down
Date Thu, 13 Jun 2013 18:11:21 GMT
Daniel Laügt created AMQCPP-491:
-----------------------------------

             Summary: Connection didn't switch to the slave broker when the master broker
is down
                 Key: AMQCPP-491
                 URL: https://issues.apache.org/jira/browse/AMQCPP-491
             Project: ActiveMQ C++ Client
          Issue Type: Bug
          Components: Transports
    Affects Versions: 3.7.0
         Environment: Windows 7, VS2010
            Reporter: Daniel Laügt
            Assignee: Timothy Bish
            Priority: Minor


Master/Slave configuration with a shared data directory:
ActiveMQ Configuration (activemq.xml):
<persistenceAdapter>
  <kahaDB directory="\\host1\kahadb"/>
</persistenceAdapter>

URL:
failover:(tcp://host1:port1,tcp://host2:port2)?randomize=false

Test case:
1) Run ActiveMQ on host2, it becomes the master
2) Run ActiveMQ on host1, it becomes the slave
3) Run a program that opens an ActiveMQ connection
4) Shutdown ActiveMQ on host2
5) The ActiveMQ connection is not able to switch to host1.

Explanation:
The test case has randomize=false to be able to reproduce the problem anytime. If randomize=true,
the problem occurs randomly.

At step 3, ActiveMQ-CPP tries to open first a connection with host1. It fails as host1 is
the slave. Then it tries to open a connection with host2. This time, it succeeds but it forgets
to put back the failure hosts (host1) to broker lists. At this point, the broker list = {host2}.

At step 5, ActiveMQ-CPP tries to open a connection with the broker list. As the broker list
= {host2}, it will try to open a connection only with host2.


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