Use async delayed in the error handler / onException. And also asyncConsumer=true on the jms consumer.
On Fri, Aug 2, 2013 at 3:51 PM, Bernard Ligny <bernard.li...@gmail.com> wrote: > Can someone please confirm what my colleague has observed on our project (NB: > We use Camel 2.8.5). > > Let us take for instance: > - a JMS consumer (with a particular value of "maxConcurrentConsumers") > - a (non transacted) error handler with the following redelivery policy: > * a large number of retries (ex: 20) > * a significant amount of times between 2 attempts (ex: 5 sec) > * useExponentialBackOff=true + backOffMultiplier > > So, in the worst situation, the complete retry process (for a single > exchange) will take a very a long time: > 20 attempts x (at least 5) sec = more than 100 sec > > During the time (>100 sec) Camel is busy with the processing of this single > exchange, we may of course receive many items in the JMS queue. > > What we have observed, is that the JMS consumer is staying busy and does NOT > release its jms session until a successful attempt. In my example, a jms > consumer will hold the connection for 100 sec, even while sleeping between 2 > attempts ! Needless to say that, in case of "burst" on the producer side, > there could be rapidly no more enough free consumers... > > I do not understand why (in a non transacted route) Camel does not > immediately release its jms session. > Is it a wanted behaviour (and also a good practice) to keep holding the JMS > connection till the end of the processing of the exchange ? > If we decide for instance to wait 60 sec between 2 attempts, I would like > for instance to pause/free my jms consumer so that he can serve other > potential messages present in my queue. > > > > > > > > > -- > View this message in context: > http://camel.465427.n5.nabble.com/Risk-of-JMS-flooding-with-long-lasted-redelivery-policy-tp5736707.html > Sent from the Camel - Users mailing list archive at Nabble.com. -- Claus Ibsen ----------------- Red Hat, Inc. Email: cib...@redhat.com Twitter: davsclaus Blog: http://davsclaus.com Author of Camel in Action: http://www.manning.com/ibsen
