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From Manish loves Java <praman...@gmail.com>
Subject Getting Duplicate messages from slave when master is down
Date Thu, 19 Jun 2008 10:46:41 GMT

Hi All,

I want to use master/slave.I have configured them but here i am having two
issues.
1) Suppose Master is down and slave acts as a master at that time it
delievers duplicate messages.
    How can i make slave to dispatch those messages which are not dispatched
by master
    before getting down?
    [ how can i make slave to deliever those messages which are not
delievered by master]
2) In Master activemq console i get following error:
   java.lang.AssertionError: Unsupported Method
        at
org.apache.activemq.transport.TransportSupport.request(TransportSupport.java:71)
        at
org.apache.activemq.transport.TransportFilter.request(TransportFilter.java:88)
        at
org.apache.activemq.transport.TransportFilter.request(TransportFilter.java:88)
        at
org.apache.activemq.transport.MutexTransport.request(MutexTransport.java:49)
        at
org.apache.activemq.broker.ft.MasterBroker.sendSyncToSlave(MasterBroker.java:363)
        at
org.apache.activemq.broker.ft.MasterBroker.sendToSlave(MasterBroker.java:345)
        at
org.apache.activemq.broker.ft.MasterBroker.acknowledge(MasterBroker.java:320)
        at
org.apache.activemq.broker.MutableBrokerFilter.acknowledge(MutableBrokerFilter.java:8
        at
org.apache.activemq.broker.TransportConnection.processMessageAck(TransportConnection.
        at org.apache.activemq.command.MessageAck.visit(MessageAck.java:179)
        at
org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:284)
        at
org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:1
        at
org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:65)
        at
org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.jav
        at
org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:122)
        at
org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:84)
        at
org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:137)
        at java.lang.Thread.run(Thread.java:595)
ERROR MasterBroker                   - Slave Failed


Can anybody please tell me how can i overcome from these two issues.

Thanx a lot in advance.

Regards,
Manish
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