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Posted to users@activemq.apache.org by James Green <ja...@gmail.com> on 2012/11/02 16:14:54 UTC
Pending messages on queue is stale or wrong
I am looking at the web console and the JMX connection which tell me that a
queue has 55 pending messages.
If I click in the web console to browse them, an empty list is displayed.
If I click any of the browseX() methods of the JMX console, I get an empty
dialog back. The cursorSize() returns 55, doesCursorHaveMessagesBuffered()
returns false.
Is this a known problem? Can it be explained sensibly?
Thanks,
James
Re: Pending messages on queue is stale or wrong
Posted by Torsten Mielke <to...@fusesource.com>.
Hi James,
Theoretically the prefetch should not cause such problem. If it does, its a bug.
On Nov 5, 2012, at 11:29 AM, James Green wrote:
> Torsten, All our brokers are on 5.7.0.
>
> I'm wondering if this is to do with a Stomp client which specifies a
> prefetch limit of 200 which processes 200 msgs then disconnects. It is
> invoked by a scheduled job manager. I've changed this prefetch limit 1 now
> to see if it makes a difference under load this week.
>
>
> On 5 November 2012 10:18, Torsten Mielke <to...@fusesource.com> wrote:
>
>> What version of ActiveMQ are you using?
>> There have been a number of bug fixes around duplicate detection in the
>> past few releases.
>> Perhaps you got some duplicate messages in your store that the cursor
>> would not dispatch because it detected them as duplicates.
>> This should generally not happen, the duplicate should not get written to
>> the store in the first place.
>>
>> If you're not at the latest and greatest version of ActiveMQ, I would
>> suggest to upgrade.
>> Otherwise it would be interesting to find out how to reproduce the problem
>> so that it can be analyzed further.
>>
>> Regards,
>>
>> Torsten Mielke
>> torsten@fusesource.com
>> tmielke.blogspot.com
>>
>>
>>
>> On Nov 2, 2012, at 4:20 PM, James Green wrote:
>>
>>> I restarted AMQ. The counter remains at 55. Browsing, I now see messages!
>>>
>>> They are 40 minutes old and have redelivery true. Is there anything more
>>> that can be suggested as a result?
>>>
>>>
>>>
>>> On 2 November 2012 15:14, James Green <ja...@gmail.com> wrote:
>>>
>>>> I am looking at the web console and the JMX connection which tell me
>> that
>>>> a queue has 55 pending messages.
>>>>
>>>> If I click in the web console to browse them, an empty list is
>> displayed.
>>>>
>>>> If I click any of the browseX() methods of the JMX console, I get an
>> empty
>>>> dialog back. The cursorSize() returns 55,
>> doesCursorHaveMessagesBuffered()
>>>> returns false.
>>>>
>>>> Is this a known problem? Can it be explained sensibly?
>>>>
>>>> Thanks,
>>>>
>>>> James
Re: Pending messages on queue is stale or wrong
Posted by James Green <ja...@gmail.com>.
Torsten, All our brokers are on 5.7.0.
I'm wondering if this is to do with a Stomp client which specifies a
prefetch limit of 200 which processes 200 msgs then disconnects. It is
invoked by a scheduled job manager. I've changed this prefetch limit 1 now
to see if it makes a difference under load this week.
On 5 November 2012 10:18, Torsten Mielke <to...@fusesource.com> wrote:
> What version of ActiveMQ are you using?
> There have been a number of bug fixes around duplicate detection in the
> past few releases.
> Perhaps you got some duplicate messages in your store that the cursor
> would not dispatch because it detected them as duplicates.
> This should generally not happen, the duplicate should not get written to
> the store in the first place.
>
> If you're not at the latest and greatest version of ActiveMQ, I would
> suggest to upgrade.
> Otherwise it would be interesting to find out how to reproduce the problem
> so that it can be analyzed further.
>
> Regards,
>
> Torsten Mielke
> torsten@fusesource.com
> tmielke.blogspot.com
>
>
>
> On Nov 2, 2012, at 4:20 PM, James Green wrote:
>
> > I restarted AMQ. The counter remains at 55. Browsing, I now see messages!
> >
> > They are 40 minutes old and have redelivery true. Is there anything more
> > that can be suggested as a result?
> >
> >
> >
> > On 2 November 2012 15:14, James Green <ja...@gmail.com> wrote:
> >
> >> I am looking at the web console and the JMX connection which tell me
> that
> >> a queue has 55 pending messages.
> >>
> >> If I click in the web console to browse them, an empty list is
> displayed.
> >>
> >> If I click any of the browseX() methods of the JMX console, I get an
> empty
> >> dialog back. The cursorSize() returns 55,
> doesCursorHaveMessagesBuffered()
> >> returns false.
> >>
> >> Is this a known problem? Can it be explained sensibly?
> >>
> >> Thanks,
> >>
> >> James
> >>
> >>
>
>
>
>
>
>
Re: Pending messages on queue is stale or wrong
Posted by Torsten Mielke <to...@fusesource.com>.
What version of ActiveMQ are you using?
There have been a number of bug fixes around duplicate detection in the past few releases.
Perhaps you got some duplicate messages in your store that the cursor would not dispatch because it detected them as duplicates.
This should generally not happen, the duplicate should not get written to the store in the first place.
If you're not at the latest and greatest version of ActiveMQ, I would suggest to upgrade.
Otherwise it would be interesting to find out how to reproduce the problem so that it can be analyzed further.
Regards,
Torsten Mielke
torsten@fusesource.com
tmielke.blogspot.com
On Nov 2, 2012, at 4:20 PM, James Green wrote:
> I restarted AMQ. The counter remains at 55. Browsing, I now see messages!
>
> They are 40 minutes old and have redelivery true. Is there anything more
> that can be suggested as a result?
>
>
>
> On 2 November 2012 15:14, James Green <ja...@gmail.com> wrote:
>
>> I am looking at the web console and the JMX connection which tell me that
>> a queue has 55 pending messages.
>>
>> If I click in the web console to browse them, an empty list is displayed.
>>
>> If I click any of the browseX() methods of the JMX console, I get an empty
>> dialog back. The cursorSize() returns 55, doesCursorHaveMessagesBuffered()
>> returns false.
>>
>> Is this a known problem? Can it be explained sensibly?
>>
>> Thanks,
>>
>> James
>>
>>
Re: Pending messages on queue is stale or wrong
Posted by James Green <ja...@gmail.com>.
I restarted AMQ. The counter remains at 55. Browsing, I now see messages!
They are 40 minutes old and have redelivery true. Is there anything more
that can be suggested as a result?
On 2 November 2012 15:14, James Green <ja...@gmail.com> wrote:
> I am looking at the web console and the JMX connection which tell me that
> a queue has 55 pending messages.
>
> If I click in the web console to browse them, an empty list is displayed.
>
> If I click any of the browseX() methods of the JMX console, I get an empty
> dialog back. The cursorSize() returns 55, doesCursorHaveMessagesBuffered()
> returns false.
>
> Is this a known problem? Can it be explained sensibly?
>
> Thanks,
>
> James
>
>