JBoss HornetQ flow configuration

[creichel]

Hi,

I was checking the consumer-window-size (Window-Based Flow Control).

Given the default message buffering behavior that gets some messages from the server and buffers on the client before it is consumed.

1 - What happens if the client disconnects? This buffered messages are lost?

2 - How it works when you have clusters?

Thanks

[jbertram]

When a client buffers a message the server realize that it has sent the message to the client but the client has not yet acknowledged the message.  Such messages are marked as "in delivery" (which you can see in the queue statistics).  If the client to whom those messages were sent disconnects then the server un-marks those messages as "in delivery" and makes them available to other clients.  In other words, the messages are not lost.

I don't really understand what you're asking about clusters.

[creichel]

Hey Justin, thanks for the answer.

So I can assume that if a client doesn't send a disconnect then a timeout will occur right? (Any idea of how long is this timeout value set?)

Cheers

[jbertram]

So I can assume that if a client doesn't send a disconnect then a timeout will occur right?

That's right.

(Any idea of how long is this timeout value set?)

See Detecting Dead Connections in the HornetQ documentation.