[jira] [Created] (ARTEMIS-627) Producer Block does work properly on CORE protocol

["Martyn Taylor (JIRA)" <ji...@apache.org>]

Martyn Taylor created ARTEMIS-627:
-------------------------------------

             Summary: Producer Block does work properly on CORE protocol
                 Key: ARTEMIS-627
                 URL: https://issues.apache.org/jira/browse/ARTEMIS-627
             Project: ActiveMQ Artemis
          Issue Type: Bug
            Reporter: Martyn Taylor


To BLOCK production of messages to an address once it reaches a particular size in memory, an AddressSetting can be added to the broker that specifies the address size, address match string and the address full policy "BLOCK".

This should block messages once the address is full, however the current implementation uses flow control to allocate producers credits, once the address is full the broker will not allocate any more credits.

There are two issues with this approach.

1. The main issue is that the credits are not tracked or checked at the broker side.  The ActiveMQ client takes care of blocking message production when it runs out of credit.  However, a rogue client could easily allocate it's own credits and continue sending.  I've tested this by hacking the client and it behaves in this way.

2. Even in a non hacked client the size of the address could be pushed over it's limit, as more credits can be allocated than is available space on the address.  An address can be full, no more credits are allocated but each producer is able to empty it's credits pushing the address over its limit.




--
This message was sent by Atlassian JIRA
(v6.3.4#6332)