To be honest the documentation at
http://camel.apache.org/dead-letter-channel.html is a little contradictory
and could use some touch-ups:
1. Under "Redelivery default values" the service is turned off and has 0
maximumRedeliveries, yet later it says "By default Camel will try to
process the exchange 1 + 5 times."
2. There is no example of how one might log the Exception + stacktrace that
caused the DLC to be invoked. This must be a common requirement?
On 13 April 2015 at 16:19, Claus Ibsen <claus.ib...@gmail.com> wrote:
> The DLC do not magically include stacktraces. It sends the message
> as-is. If you want to include stacktraces / exception message or
> whatever you need to enrich the message before sending to the DLQ to
> include that.
>
> On Mon, Apr 13, 2015 at 5:12 PM, James Green <james.mk.gr...@gmail.com>
> wrote:
> > An update: the email is sent just fine (I received it eventually). The
> > trouble is later on - the deadLetterChannel does not appear to log a
> stack
> > trace.
> >
> > An engineer here is currently scratching his head over this one - unable
> to
> > see what the route cause is. Any ideas?
> >
> > On 10 April 2015 at 17:32, Reji Mathews <contactr...@gmail.com> wrote:
> >
> >> Can u make your Q a little more clear. I assume u got this exception as
> >> there is no smtp server on ur local host at Port 25.
> >> Obviously it will be caught by ur error handler and since u have used a
> >> dead letter handler , after specified retry attempts it will get
> persisted
> >> to the dead letter uri viz in ur case a jms queue
> >>
> >> What's the issue exactly.?
> >>
> >> If you are searching for the stack trace it won't be there as its
> caught by
> >> ur error handler and message managed .
> >>
> >> If u remove ur handlers , u will get the connection refused exception
> and
> >> stack traces.
> >>
> >> Cheers
> >> Reji
> >> On 10 Apr 2015 16:51, "James Green" <james.mk.gr...@gmail.com> wrote:
> >>
> >> > We just saw this in the log:
> >> >
> >> > 10/Apr/2015 10:56:04,683- DefaultJavaMailSender: Connecting to
> >> localhost:25
> >> > 10/Apr/2015 10:56:04,701- DefaultJavaMailSender: Sending MimMessage:
> >> > javax.mail.internet.MimeMessage@385158f4 using host: localhost
> >> > 10/Apr/2015 10:56:04,715- DeadLetterChannel: Failed delivery for
> >> > (MessageId: ID-ngw-audit-01-39856-1428654916549-0-69 on ExchangeId:
> >> > ID-ngw-audit-01-39
> >> > 856-1428654916549-0-66). On delivery attempt: 0 caught:
> >> > java.lang.NullPointerException
> >> >
> >> > The endpoint concerned is smtp://localhost and we're sending a
> >> MimeMessage
> >> > down it. Sadly there's nothing more to go on - should we not expect a
> >> stack
> >> > trace somewhere?
> >> >
> >> > Error handler:
> >> >
> >> >
> >> >
> >>
> errorHandler(deadLetterChannel("activemq:queue:DeliveryReportByEmail.DQL").useOriginalMessage());
> >> >
> >> > The logStackTrace should be on by default looking at the camel
> sources?
> >> >
> >> > Thanks,
> >> >
> >> > James
> >> >
> >>
>
>
>
> --
> 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
> hawtio: http://hawt.io/
> fabric8: http://fabric8.io/
>
