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From Chinmay Soman <chinmay.cere...@gmail.com>
Subject Re: New to Samza/Yarn and having Kafka issues
Date Tue, 24 Mar 2015 00:14:35 GMT
Oh, I just meant in your job config:

metrics.reporter.jmx.class=org.apache.samza.metrics.reporter.JmxReporterFactory
metrics.reporters=jmx


On Mon, Mar 23, 2015 at 5:13 PM, Ash W Matheson <ash.matheson@gmail.com>
wrote:

> 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
> >
>



-- 
Thanks and regards

Chinmay Soman

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