On 8/20/15, 9:56 PM, "tbai...@gmail.com on behalf of Tim Bain" <tbai...@gmail.com on behalf of tb...@alumni.duke.edu> wrote: >The broker can't discard the message till all subscribers have consumed it, This is good information, thanks! I am wondering if there is a way to detect this? >so a single slow consumer will result in increased memory/store usage and >eventually PFC. You could set up a slow consumer abortion strategy if >you're worried about that possibility. >On Aug 20, 2015 10:13 AM, "Daniel Israel" <disr...@liveops.com> wrote: > >> Oooh, that's a good idea to add another subber. I may be able to try that. >> >> Also, could something on the client side cause a backup? Or will the >> broker just fall through if a client hangs? >> >> >> >> On 8/20/15, 7:18 AM, "tbai...@gmail.com on behalf of Tim Bain" < >> tbai...@gmail.com on behalf of tb...@alumni.duke.edu> wrote: >> >> >Since this is happening in production, I assume it's not acceptable to >> >attach a debugger and set a breakpoint on the line where the exception is >> >thrown. If you could, that would let you step into the >> >MemoryUsage.isFull() call and see what's going on, but it'll hang the >> >broker when it happens and I assume that won't fly. >> > >> >You could probably figure out the size of the messages just by creating a >> >test app that just logs the size of each message it receives and having it >> >become another subscriber on the topic. It won't tell you the rate at >> >which your consumers consume, but you'll know the input rates at least. >> > >> >If you're worried that your topics are filling up because your consumers >> >are falling behind, you could force them to disconnect (and throw away >> >their pending messages) if they get too far behind. >> >http://activemq.apache.org/slow-consumer-handling.html Just make sure >> the >> >limit you set is smaller than the PFC per-destination limit, or you'll >> >never hit it. >> > >> >Tim >> > >> >On Wed, Aug 19, 2015 at 11:37 AM, Daniel Israel <disr...@liveops.com> >> wrote: >> > >> >> >> >> Forgot to attach. This is log message: >> >> >> >> 2013-03-30 22:34:42,824 [.96.47.33:34886] WARN Service >> >> - Async error occurred: javax.jms.ResourceAllocationException: Usage >> >> Manager memory limit reached >> >> javax.jms.ResourceAllocationException: Usage Manager memory limit >> reached >> >> at org.apache.activemq.broker.region.Topic.send(Topic.java:293) >> >> at >> >> >> org.apache.activemq.broker.region.AbstractRegion.send(AbstractRegion.java:354) >> >> at >> >> >> org.apache.activemq.broker.region.RegionBroker.send(RegionBroker.java:443) >> >> at >> >> >> org.apache.activemq.broker.TransactionBroker.send(TransactionBroker.java:224) >> >> at >> org.apache.activemq.broker.BrokerFilter.send(BrokerFilter.java:126) >> >> at >> >> >> org.apache.activemq.broker.CompositeDestinationBroker.send(CompositeDestinationBroker.java:95) >> >> at >> >> >> org.apache.activemq.broker.MutableBrokerFilter.send(MutableBrokerFilter.java:133) >> >> at >> >> >> org.apache.activemq.broker.TransportConnection.processMessage(TransportConnection.java:455) >> >> at >> >> >> org.apache.activemq.command.ActiveMQMessage.visit(ActiveMQMessage.java:639) >> >> at >> >> >> org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:308) >> >> at >> >> >> org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:182) >> >> at >> >> >> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:68) >> >> at >> >> >> org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:113) >> >> at >> >> >> org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:210) >> >> at >> >> >> org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:84) >> >> at >> >> >> org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:203) >> >> at >> >> >> org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:185) >> >> at java.lang.Thread.run(Thread.java:662) >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> On 8/19/15, 6:53 AM, "tbai...@gmail.com on behalf of Tim Bain" < >> >> tbai...@gmail.com on behalf of tb...@alumni.duke.edu> wrote: >> >> >> >> >Hmm, the error messages I'm used to seeing (from 5.8.0 and 5.10.0) look >> >> >like the one in this page ( >> >> >http://blogs.sourceallies.com/2014/10/activemq-memory-tuning/), which >> >> give >> >> >lots of information about what limit is being hit. I guess that >> detailed >> >> >info must have been added in a version after the one you're using. >> What >> >> >version is that, anyway? >> >> > >> >> >Can you post the full log message? >> >> > >> >> >Have you explored the JMX tree to see if there is any info to tell you >> how >> >> >full your topics are? Obviously what information is available will >> vary >> >> >based on what version you're running, so that might not help, but you >> >> >should definitely check. >> >> >On Aug 18, 2015 10:18 AM, "Daniel Israel" <disr...@liveops.com> wrote: >> >> > >> >> >> >> >> >> Hi Tim, thanks for response. >> >> >> >> >> >> Flow control is enabled, and it's configured to fail if out of >> memory. >> >> As >> >> >> noted below, the log lines in this version don't tell us which limit >> >> we're >> >> >> exceeding, so we're running half blind :(. Knowing average topic >> size >> >> >> would be helpful, but having individual topic size would be good. >> Right >> >> >> now, looking at the producer side to see if there is some way to >> track. >> >> >> >> >> >> Raised the topic limit to 20mb and still had an issue. It's very hit >> >> and >> >> >> miss. I can run for a week without issue, then when I get hit hard, >> it >> >> >> falls over. >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> On 8/18/15, 5:58 AM, "tbai...@gmail.com on behalf of Tim Bain" < >> >> >> tbai...@gmail.com on behalf of tb...@alumni.duke.edu> wrote: >> >> >> >> >> >> >Later versions give a few addition stats (such as average message >> size) >> >> >> via >> >> >> >JMX, but that won't help you till that upgrade in production is >> >> complete. >> >> >> > >> >> >> >Do you have producer flow control enabled? The error you're getting >> >> >> >doesn't match what I remember it being the last time I hit it, so >> I'm >> >> >> >assuming you don't. PFC gives log lines that at least tell you >> exactly >> >> >> >which limit you ran into, plus it'll avoid losing any messages (but >> >> it'll >> >> >> >"hang" producers till messages are consumed), so you could enable >> it to >> >> >> >better understand what's going on. >> >> >> > >> >> >> >Tim >> >> >> >On Aug 17, 2015 1:45 PM, "Daniel Israel" <disr...@liveops.com> >> wrote: >> >> >> > >> >> >> >> >> >> >> >> Hello All, >> >> >> >> >> >> >> >> I am tracking down a memory issue in AMQ. I am time to time >> seeing >> >> >> >> exceptions like this: >> >> >> >> >> >> >> >> >> >> >> >> Async error occurred: javax.jms.ResourceAllocationException: Usage >> >> >> Manager >> >> >> >> memory limit reached >> >> >> >> >> >> >> >> >> >> >> >> I can't tell if this is because I am exceeding the configured >> amount >> >> of >> >> >> >> memory in SystemUsage, or if I am exceeding the amount of memory >> >> >> configured >> >> >> >> per topic. >> >> >> >> >> >> >> >> I am using only Topics right now, and I had the memory limit set >> to >> >> >> 10mb. >> >> >> >> The error doesn't direct me in any direction for this. I am >> using an >> >> >> old >> >> >> >> version of AMQ (First step was to request upgrade to latest >> version. >> >> >> It's >> >> >> >> in the works, but it might be a week or two before it's completed >> in >> >> >> >> production) and I see changes in the source that give more details >> >> when >> >> >> >> throwing this exception. Is there some historical record or log >> of >> >> >> >> Topics? What I'd really like is to be able to see how often each >> >> Topic >> >> >> >> gets and distributes a message and how big that message was. The >> >> >> dashboard >> >> >> >> and Jconsole give me some information, but because Topics are >> >> delivered >> >> >> >> then released, I don't have any information beyond how many were >> >> >> enqueued >> >> >> >> and delivered. >> >> >> >> >> >> >> >> Is there any such animal available that would help me with this? >> Or >> >> >> >> suggestions how to approach? Any help is appreciated. Thanks. >> >> >> >> >> >> >> >> >> >>
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