Thanks.. I’m investigating whether this is slow consumer activity but I don’t have any log error messages marking them as slow.
On Sun, Mar 1, 2015 at 6:59 AM, Tim Bain <tb...@alumni.duke.edu> wrote: > Look in JMX to view all the consumers for a queue; for each one, look at > the dispatched count and see whether it's around zero, around your prefetch > buffer size, or somewhere in the middle. > > If they're all near zero, that means the broker isn't delivering messages > to the clients' prefetch buffer fast enough, though I don't have any > guesses about what mighht cause that. If they're all near the prefetch > size, then the client code isn't turning messages over to your code fast > enough (possibly due to transactional behavior as Tim alluded to). And if > they're all in the middle, then i have no idea what that means. > > Tim > On Feb 28, 2015 10:40 PM, "Tim Robbins" <tim.robb...@outlook.com> wrote: > > > Hi Kevin, > > > > Knowing how the clients are consuming messages could help, i.e. whether > > it’s transactional or not, whether MessageConsumers are being > > reused/pooled, etc. As a long shot, I’d try lowering the prefetch limit > > client side. I’ve had to do this occasionally to work around inefficient > > Camel clients. > > http://activemq.apache.org/what-is-the-prefetch-limit-for.html < > > http://activemq.apache.org/what-is-the-prefetch-limit-for.html> > > > > Regards, > > > > Tim > > > > > On 1 Mar 2015, at 1:32 pm, Kevin Burton <bur...@spinn3r.com> wrote: > > > > > > I’m having a weird situation where ActiveMQ is refusing to send > messages > > to > > > my consumers. > > > > > > I have 4 main queues that my consumers receive messages on. I have > plenty > > > of them. They have plenty of CPU, network, etc. > > > > > > I looked at their stack traces and they’re ALL waiting to receive > > messages. > > > > > > ActiveMQ has about 7000 messages in these 4 queues that it’s just > > trickling > > > out to the consumers. VERY slow rate. > > > > > > The box it’s running on is fine. ActiveMQ has plenty of memory, isn’t > > > GCing. I also looked at its stack traces and nothing weird here. > > > > > > It’s just not sending at a very fast rate. > > > > > > Now, if I restart all my daemons, including ActiveMQ , everything works > > > fine for about 1-2 hours, then I get to this stall point again. > > > > > > I’ve read about the slow consumers. I don’t have any log warnings for > > this > > > so I don’t think that’s a problem. (plus these are queues). > > > > > > Anything else I should look into? > > > > > > -- > > > > > > Founder/CEO Spinn3r.com > > > Location: *San Francisco, CA* > > > blog: http://burtonator.wordpress.com > > > … or check out my Google+ profile > > > <https://plus.google.com/102718274791889610666/posts> > > > <http://spinn3r.com> > > > > > -- Founder/CEO Spinn3r.com Location: *San Francisco, CA* blog: http://burtonator.wordpress.com … or check out my Google+ profile <https://plus.google.com/102718274791889610666/posts> <http://spinn3r.com>
