Hi,
As I understand it, I am setting "kafka" as the system name, "beste" as the
output topic in the system and "syslog" as the input topic. Both topics syslog
and beste are working correctly as I am streaming some syslogs to the "syslog"
topic and I am testing "beste" with an internal application specifically
designed. I am not sure about the kafka part.
Thanks.
Jordi
-----Mensaje original-----
De: Chinmay Soman [mailto:chinmay.cere...@gmail.com]
Enviado el: lunes, 23 de marzo de 2015 17:16
Para: dev@samza.apache.org
Asunto: Re: cannot be cast to java.lang.String
Hey Jordi,
I see 3 different stream names.
1. new SystemStream("kafka", "beste");
2. task.inputs=kafka.syslog
3. systems.kafka.streams.frogain.samza.msg.serde=json
Just for a sanity check, can you double check you're setting the config params
for the correct stream ?
On Mon, Mar 23, 2015 at 3:31 AM, Jordi Blasi Uribarri <jbl...@nextel.es>
wrote:
> Hello,
>
> I have managed to get samza up and running an simple test job that
> just sends the received message. This is the code:
>
> public class job1 implements StreamTask {
> private final SystemStream OUTPUT_STREAM = new
> SystemStream("kafka", "beste");
>
> public void process(IncomingMessageEnvelope envelope,
> MessageCollector collector,
> TaskCoordinator coordinator)
> {
> String msg = (String)envelope.getMessage();
> String outmsg = msg;
> collector.send(new OutgoingMessageEnvelope(OUTPUT_STREAM,
> outmsg));
> }
> }
>
> The properties file that runs it is this one:
>
> task.class=samzafroga.job1
> job.factory.class=org.apache.samza.job.local.ThreadJobFactory
> job.name=samzafroga.job1
>
>
> systems.kafka.samza.factory=org.apache.samza.system.kafka.KafkaSystemF
> actory systems.kafka.consumer.zookeeper.connect= broker01:2181
> systems.kafka.producer.bootstrap.servers=broker01:9092
>
> task.inputs=kafka.syslog
>
> serializers.registry.json.class=org.apache.samza.serializers.JsonSerde
> Factory systems.kafka.streams.frogain.samza.msg.serde=json
>
> When I get a message in the line that contains the following command:
> String msg = (String)envelope.getMessage();
>
> I get an exception like this:
>
> 22 mar 2015 23:16:25 ERROR SamzaContainer - Caught exception in
> process loop.
> java.lang.ClassCastException: [B cannot be cast to java.lang.String
> at samzafroga.job1.process(job1.java:19)
> at
> org.apache.samza.container.TaskInstance$$anonfun$process$1.apply$mcV$sp(TaskInstance.scala:129)
> at
> org.apache.samza.container.TaskInstanceExceptionHandler.maybeHandle(TaskInstanceExceptionHandler.scala:54)
> at
> org.apache.samza.container.TaskInstance.process(TaskInstance.scala:128)
> at
> org.apache.samza.container.RunLoop$$anonfun$process$2.apply(RunLoop.scala:114)
> at
> org.apache.samza.util.TimerUtils$class.updateTimer(TimerUtils.scala:37)
> at org.apache.samza.container.RunLoop.updateTimer(RunLoop.scala:36)
> at org.apache.samza.container.RunLoop.process(RunLoop.scala:100)
> at org.apache.samza.container.RunLoop.run(RunLoop.scala:83)
> at
> org.apache.samza.container.SamzaContainer.run(SamzaContainer.scala:549)
> at
> org.apache.samza.job.local.ThreadJob$$anon$1.run(ThreadJob.scala:42)
>
> Is this a configuration issue? I tried changing the serializer to
> String but I has the same effect.
>
> Thanks,
>
> Jordi
> ________________________________
> Jordi Blasi Uribarri
> Área I+D+i
>
> jbl...@nextel.es
> Oficina Bilbao
>
> [http://www.nextel.es/wp-content/uploads/Firma_Nextel_2014.png]
>
--
Thanks and regards
Chinmay Soman
