> I don’t know if that image comes through the mailing list...
I can't see your image. For what it's worth, attachments don't usually make
it through the list.
Could you upload the image to another location and provide a link?
Also, could you provide the full stack-trace of the NPE?
I don't see in your code where you're actually closing the ClientRequestor
so that might be a problem. Without more details it's impossible to say.
Justin
On Mon, Jan 16, 2023 at 10:31 AM John Lilley
<john.lil...@redpointglobal.com.invalid> wrote:
> 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:
>
>
>
>
>
> 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
>
>
>
> [image: 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 <+1%207209385761> | john.lil...@redpointglobal.com
>
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