Spark app unable to write to elasticsearch cluster running in docker

Question

I have a elasticsearch docker image listening on 127.0.0.1:9200, I tested it using sense and kibana, It works fine, I am able to index and query documents. Now when I try to write to it from a spark App

val sparkConf = new SparkConf().setAppName("ES").setMaster("local")
sparkConf.set("es.index.auto.create", "true")
sparkConf.set("es.nodes", "127.0.0.1")
sparkConf.set("es.port", "9200")
sparkConf.set("es.resource", "spark/docs")


val sc = new SparkContext(sparkConf)
val sqlContext = new SQLContext(sc)
val numbers = Map("one" -> 1, "two" -> 2, "three" -> 3)
val airports = Map("arrival" -> "Otopeni", "SFO" -> "San Fran")
val rdd = sc.parallelize(Seq(numbers, airports))

rdd.saveToEs("spark/docs")

It fails to connect, and keeps on retrying

16/07/11 17:20:07 INFO HttpMethodDirector: I/O exception (java.net.ConnectException) caught when processing request: Operation timed out 16/07/11 17:20:07 INFO HttpMethodDirector: Retrying request

I tried using IPAddress given by docker inspect for the elasticsearch image, that also does not work. However when I use a native installation of elasticsearch, the Spark App runs fine. Any ideas?

Answer 1

Also, set the config

es.nodes.wan.only to true

As mentioned in this answer if you are having issues writing to ES.