in spark kafka example, it says
`./bin/run-example org.apache.spark.streaming.examples.KafkaWordCount local[2] zoo01,zoo02,zoo03 my-consumer-group topic1,topic2 1` can any one tell me what does local[2] represent ? i thought master url should be sth like spark://hostname:portname . also, the thread count is specified as 1 in kafka example, what will happen thread count goes to more than 1 ? does that mean multiple kafka consumer will be created on different spark workers ? I'm not sure how does the code mapped to realtime worker thread allocation ? Is there any documentation on that ? Weide
