Exceptions: Cannot lookup a consumer from a connection that had not been registered / The subscription does not exist

[jayeff <jo...@googlemail.com>]

Hi all,

I run an ActiveMQ 5.5.1 broker with two queues. Clients produce messages
(varying from many small to some of significant size) and put them into
queue 1, from where consumers take the messages from the queue by pulling
them at their speed (message prefetch = 0). Messages are sent in
transactions. Consumers then calculate some stuff and put an answer message
into queue 2 when they have finished their calculation. Clients take the
answer message from this second queue. 
Persistence is through kahaDB. Producer flow control is enabled, but the
memory limits are not hit. 
This works alright and throughput does not seem to be an issue either. 

However I see the following two exceptions on the broker sometimes. Could
anyone give me a hint what they might mean? I could not find anything useful
in the ActiveMQ docs or Google either.

Many thanks, JF


WARN [ActiveMQ Transport: tcp:///140.39.12.159:40323]
(TransportConnection.java:290) -
org.apache.activemq.broker.TransportConnection.Service Async error occurred:
java.lang.IllegalArgumentException: The subscr
iption does not exist: ID:XYZ:28807:2:1
java.lang.IllegalArgumentException: The subscription does not exist:
ID:XYZ:28807:2:1
        at
org.apache.activemq.broker.region.AbstractRegion.messagePull(AbstractRegion.java:389)
        at
org.apache.activemq.broker.region.RegionBroker.messagePull(RegionBroker.java:557)
        at
org.apache.activemq.broker.BrokerFilter.messagePull(BrokerFilter.java:81)
        at
org.apache.activemq.broker.BrokerFilter.messagePull(BrokerFilter.java:81)
        at
org.apache.activemq.broker.BrokerFilter.messagePull(BrokerFilter.java:81)
        at
org.apache.activemq.broker.MutableBrokerFilter.messagePull(MutableBrokerFilter.java:245)
        at
org.apache.activemq.broker.TransportConnection.processMessagePull(TransportConnection.java:470)
        at
org.apache.activemq.command.MessagePull.visit(MessagePull.java:43)
        at
org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306)
        at
org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179)
        at
org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69)
        at
org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:113)
        at
org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:227)
        at
org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83)
        at
org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:220)
        at
org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:202)
        at java.lang.Thread.run(Thread.java:662)

==================================================

WARN [ActiveMQ Transport: tcp:///140.39.12.159:45179]
(TransportConnection.java:290) -
org.apache.activemq.broker.TransportConnection.Service Async error occurred:
java.lang.IllegalStateException: Cannot lookup a consumer from a connection
that had not been registered: ID:XYZ:31449
java.lang.IllegalStateException: Cannot lookup a consumer from a connection
that had not been registered: ID:XYZ:31449
        at
org.apache.activemq.broker.SingleTransportConnectionStateRegister.lookupConnectionState(SingleTransportConnectionStateRegister.java:83)
        at
org.apache.activemq.broker.TransportConnection.lookupConnectionState(TransportConnection.java:1423)
        at
org.apache.activemq.broker.TransportConnection.processMessagePull(TransportConnection.java:470)
        at
org.apache.activemq.command.MessagePull.visit(MessagePull.java:43)
        at
org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:306)
        at
org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:179)
        at
org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:69)
        at
org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:113)
        at
org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:227)
        at
org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83)
        at
org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:220)
        at
org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:202)
        at java.lang.Thread.run(Thread.java:662)

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