Messages accumulating in management queue

[John Lilley]

Greetings!

We are using the Artemis queue-based management APIs, and noticed that one of 
the two management queues that appears in the console starts to grow without 
bound:

[cid:image003.png@01D9298D.231470D0]

I don’t know if that image comes through the mailing list, but it shows two of 
the “activemq.management.<UUID>”  queues, and one of the counts is in the 100s. 
 It just keeps growing and growing by about 300 per minute.

I’ve tried to browse this queue on the management console, but the browse() 
operation shows an NPE:
java.lang.NullPointerException : Cannot invoke 
"org.apache.activemq.artemis.core.paging.cursor.PageSubscription.iterator(boolean)"
 because "this.this$0.pageSubscription" is null

The calls we are making are like:
String resourceName = ResourceNames.QUEUE + queueName;
ClientRequestor client = getClient();
ClientSession clientSession = …
ClientMessage request = clientSession.createMessage(false);
ManagementHelper.putAttribute(request, resourceName, attributeName);
ClientMessage reply = client.request(request);


Or
ClientRequestor client = getClient();
ClientMessage request = clientSession.createMessage(false);
ManagementHelper.putAttribute(request, resourceName, attributeName);
ClientMessage reply = client.request(request);
if (ManagementHelper.hasOperationSucceeded(reply)) {
       for (var value : (Object[])ManagementHelper.getResult(reply, 
Object.class)) {
              result.add(value.toString());
       }


Any idea what we are doing wrong?

This happens on windows or linux

Artemis version 2.27.0.

java –version
openjdk 17.0.3 2022-04-19
OpenJDK Runtime Environment Temurin-17.0.3+7 (build 17.0.3+7)
OpenJDK 64-Bit Server VM Temurin-17.0.3+7 (build 17.0.3+7, mixed mode, sharing)

Thanks
john



[rg] <https://www.redpointglobal.com/>

John Lilley

Data Management Chief Architect, Redpoint Global Inc.

888 Worcester Street, Suite 200 Wellesley, MA 02482

M: +1 7209385761<tel:+1%207209385761> | 
john.lil...@redpointglobal.com<mailto:john.lil...@redpointglobal.com>

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