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From Ash W Matheson <ash.mathe...@gmail.com>
Subject Re: New to Samza/Yarn and having Kafka issues
Date Tue, 24 Mar 2015 00:13:25 GMT
I'm assuming I have Jmx defined ... where would that get set?

On Mon, Mar 23, 2015 at 5:08 PM, Chinmay Soman <chinmay.cerebro@gmail.com>
wrote:

> 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.matheson@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.matheson@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 <
> > > nsomasundaram@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.matheson@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
>

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