Hey Ash,
Can you see your job metrics (if you have the Jmx metrics defined) to see
if your job is actually doing anything ? My only guess at this point is the
process method is not being called because somehow there's no incoming
data. I could be totally wrong of course.
On Mon, Mar 23, 2015 at 4:28 PM, Ash W Matheson <ash.mathe...@gmail.com>
wrote:
> Just to be clear, here's what's changed from the default hello-samza repo:
>
> wikipedia-parser.properties==========================
> task.inputs=kafka.myTopic
> systems.kafka.consumer.zookeeper.connect=
> ec2-xxx-xxx-xxx-xxx.compute-1.amazonaws.com:2181/
> systems.kafka.consumer.auto.offset.reset=smallest
>
> WikipediaParserStreamTask.java =====================
> public void process(IncomingMessageEnvelope envelope, MessageCollector
> collector, TaskCoordinator coordinator) {
> Map<String, Object> jsonObject = (Map<String, Object>)
> envelope.getMessage();
> WikipediaFeedEvent event = new WikipediaFeedEvent(jsonObject);
>
> try {
> System.out.println(event.getRawEvent());
> // Map<String, Object> parsedJsonObject = parse(event.getRawEvent());
>
> // parsedJsonObject.put("channel", event.getChannel());
> // parsedJsonObject.put("source", event.getSource());
> // parsedJsonObject.put("time", event.getTime());
>
> // collector.send(new OutgoingMessageEnvelope(new
> SystemStream("kafka", "wikipedia-edits"), parsedJsonObject));
>
> as well as the aforementioned changes to the log4j.xml file.
>
> The data pushed into the 'myTopic' topic is nothing more than a sentence.
>
>
> On Mon, Mar 23, 2015 at 4:16 PM, Ash W Matheson <ash.mathe...@gmail.com>
> wrote:
>
> > yep, modified log4j.xml to look like this:
> >
> > <root>
> > <priority value="debug" />
> > <appender-ref ref="RollingAppender"/>
> > <appender-ref ref="jmx" />
> > </root>
> >
> > Not sure what you mean by #2.
> >
> > However, I'm running now, not seeing any exceptions, but still not seeing
> > any output from System.out.println(...)
> >
> > On Mon, Mar 23, 2015 at 11:29 AM, Naveen Somasundaram <
> > nsomasunda...@linkedin.com.invalid> wrote:
> >
> >> Hey Ash,
> >> 1. Did you happen to modify your log4j.xml ?
> >> 2. Can you print the class path that was printed when the
> >> job started ? I am wondering if log4j was not loaded or not present in
> the
> >> path where it’s looking for. If you have been using hello samza, it
> should
> >> have pulled it from Maven.
> >>
> >> Thanks,
> >> Naveen
> >>
> >> On Mar 22, 2015, at 10:35 AM, Ash W Matheson <ash.mathe...@gmail.com>
> >> wrote:
> >>
> >> > Hey all,
> >> >
> >> > Evaluating Samza currently and am running into some odd issues.
> >> >
> >> > I'm currently working off the 'hello-samza' repo and trying to parse a
> >> > simple kafka topic that I've produced through an extenal java app
> >> (nothing
> >> > other than a series of sentences) and it's failing pretty hard for me.
> >> The
> >> > base 'hello-samza' set of apps works fine, but as soon as I change the
> >> > configuration to look at a different Kafka/zookeeper I get the
> >> following in
> >> > the userlogs:
> >> >
> >> > 2015-03-22 17:07:09 KafkaSystemAdmin [WARN] Unable to fetch last
> offsets
> >> > for streams [myTopic] due to kafka.common.KafkaException: fetching
> topic
> >> > metadata for topics [Set(myTopic)] from broker
> >> > [ArrayBuffer(id:0,host:redacted,port:9092)] failed. Retrying.
> >> >
> >> >
> >> > The modifications are pretty straightforward. In the
> >> > Wikipedia-parser.properties, I've changed the following:
> >> > task.inputs=kafka.myTopic
> >> > systems.kafka.consumer.zookeeper.connect=redacted:2181/
> >> > systems.kafka.consumer.auto.offset.reset=smallest
> >> > systems.kafka.producer.metadata.broker.list=redacted:9092
> >> >
> >> > and in the actual java file WikipediaParserStreamTask.java
> >> > public void process(IncomingMessageEnvelope envelope,
> MessageCollector
> >> > collector, TaskCoordinator coordinator) {
> >> > Map<String, Object> jsonObject = (Map<String, Object>)
> >> > envelope.getMessage();
> >> > WikipediaFeedEvent event = new WikipediaFeedEvent(jsonObject);
> >> >
> >> > try {
> >> > System.out.println(event.getRawEvent());
> >> >
> >> > And then following the compile/extract/run process outlined in the
> >> > hello-samza website.
> >> >
> >> > Any thoughts? I've looked online for any 'super simple' examples of
> >> > ingesting kafka in samza with very little success.
> >>
> >>
> >
>
--
Thanks and regards
Chinmay Soman
