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https://issues.apache.org/jira/browse/ARTEMIS-4362?focusedWorklogId=870748&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-870748
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ASF GitHub Bot logged work on ARTEMIS-4362:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 13/Jul/23 09:54
            Start Date: 13/Jul/23 09:54
    Worklog Time Spent: 10m 
      Work Description: gtully commented on code in PR #4552:
URL: https://github.com/apache/activemq-artemis/pull/4552#discussion_r1262321833


##########
artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/QueueImpl.java:
##########
@@ -179,6 +179,14 @@ public class QueueImpl extends CriticalComponentImpl 
implements Queue {
 
    private volatile boolean queueDestroyed = false;
 
+   // Variable to control if we should print a flow controlled message or not.
+   // Once it was flow controlled, we will stop warning until it's cleared 
once again
+   private volatile boolean pageFlowControlled = false;
+
+   private volatile long pageFlowControlledLastLog = 0;
+
+   private static final long PAGE_FLOW_CONTROL_PRINT_INTERVAL = 60_000L;

Review Comment:
   I think this will need to be configurable.... possibly combining with what 
we do for flow control of a producer, when an address is blocked, and a new 
producer tries to send... it is analogous to a consumer on a blocked queue. 
Both are reaching configured limits that we expect to be met in normal 
operation, however for a new producer or consumer - the limits will influence 
expected behaviour, they cannot send or consume... and may revert to the logs 
to see why.
   
   we could have flowControllLoggingPeriod - that can be tweaked to configure 
the interval and disable. it could be applicable to both producers and 
consumers.
   Periodic will work, b/c there will be some correlation between new consumer 
being added and the period. Is it true that will always attempt a dispatch on 
adding a new consumer?
   





Issue Time Tracking
-------------------

    Worklog Id:     (was: 870748)
    Time Spent: 1h  (was: 50m)

> Produce a logger when consumers are holding too many messages not allowing 
> deposing
> -----------------------------------------------------------------------------------
>
>                 Key: ARTEMIS-4362
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-4362
>             Project: ActiveMQ Artemis
>          Issue Type: Improvement
>            Reporter: Clebert Suconic
>            Priority: Major
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> We should add a log.warn whenever the system can't read more messages because 
> consumers are holding too many messages in pending state.



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