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From Martyn Taylor <mtay...@redhat.com>
Subject Re: [Artemis] message flow with core bridges
Date Fri, 10 Nov 2017 12:15:22 GMT
Hi Nicolae,

Is broker 2 blocking production to the target address?  This would result
in back pressure on the bridge, meaning that messages will build up in
broker 1.

Logs of the brokers and bridges (with trace enabled) would help diagnose.

Cheers
Martyn




On Thu, Nov 9, 2017 at 4:49 PM, Nicolae Mihalache <xpromache@gmail.com>
wrote:

> Some more info:
>
> I enabled logging and I see these messages in the logs indicating that the
> sender is blockign after each message sent:
> Nov 09 16:07:46.730 [30]
> org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl
> sendBlocking FINEST:Sending blocking PACKET(SessionSendMessage)[type=71,
> channelID=10, packetObject=SessionSendMessage,
> message=ServerMessage[messageID=30065833866,durable=
> false,userID=null,priority=4,
> bodySize=1024, timestamp=Thu Nov 09 15:57:01 UTC 2017,expiration=0,
> durable=false,
> address=aces-sim.tm_dump,properties=TypedProperties[_AMQ_ORIG_MESSAGE_ID=
> 30065833865,_y_uniqueid=1270719294,_AMQ_ORIG_ADDRESS=
> aces-sim.tm_dump]]@2011757486,
> requiresResponse=true]
>
> I tried to follow the sourcecode to see why it's blocking, without success
> unfortunately. In
> the  org.apache.activemq.artemis.core.server.cluster.impl.BridgeImpl:
>
> https://github.com/apache/activemq-artemis/blob/1.5.4/
> artemis-server/src/main/java/org/apache/activemq/artemis/
> core/server/cluster/impl/BridgeImpl.java#L864
>
>
> the producer session (from the bridge to the remote server) seems to be
> created with pre-acknowledgment so I don't understand anything :(
>
>
> thanks for any hint
> nicolae
>
>
> On Thu, Nov 9, 2017 at 4:28 PM, Nicolae Mihalache <xpromache@gmail.com>
> wrote:
>
> > Hello,
> >
> > I have setup with a core bridge configuration between two artemis
> servers.
> > The latency between the servers is 12-13 ms (round trip).
> > I have a producer that produces about 150 messages per second and my
> > problem is that  the bridge does not manage to keep up with the producer.
> > The sender address is configured for paging and the paging directory
> keeps
> > increasing in size.
> >
> > When I run a tcpdump I see that after each tcp send there is a response
> > received so it looks to me that artemis sender waits for a confirmation
> > from the receiver before sending the next message.
> >
> > I also see in the netstat that there is no tcp buffer on the sender, load
> > average is also very small so I'm very confident that it's not a network
> > bandwith or cpu load problem.
> >
> > I tried all kind of configs:
> >  in the connector configuration  preAcknowledge=true
> > in the bridge configuration setting a large value for
> > confirmation-window-size
> >
> > none of them seems to have any effect.
> >
> > I'm using artemis core 1.5.4
> >
> > Any idea?
> >
> >
> > thanks,
> > nicolae
> >
> >
> >
>

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