Hi Costin,
I am using Spark native library to connect to Elastic Search. for non network issues we have the batch retry config, i read in post : [SPARK] es.batch.write.retry.count negative value is ignored
I am deliberately giving an invalid ES IP and the spark errors out with the below trace, since we are running in muti cluster mode, catching the exception is not feasible (have tried) as it goes into its own executor. Is there a config to set network related retry count? FYI i am using 2.3.2 Elastic Seacrh.
Any inputs related to this would be very helpful. 
Exception Stack trace.
org.apache.spark.SparkException: Job aborted due to stage failure: Task 2 in stage 1.0 failed 1 times, most recent failure: Lost task 2.0 in stage 1.0 (TID 3, localhost): org.elasticsearch.hadoop.EsHadoopIllegalArgumentException: Cannot detect ES version - typically this happens if the network/Elasticsearch cluster is not accessible or when targeting a WAN/Cloud instance without the proper setting 'es.nodes.wan.only'
at org.elasticsearch.hadoop.rest.InitializationUtils.discoverEsVersion(InitializationUtils.java:190)
at org.elasticsearch.hadoop.rest.RestService.createWriter(RestService.java:379)
at org.elasticsearch.spark.rdd.EsRDDWriter.write(EsRDDWriter.scala:40)
at org.elasticsearch.spark.rdd.EsSpark$$anonfun$saveToEs$1.apply(EsSpark.scala:67)
at org.elasticsearch.spark.rdd.EsSpark$$anonfun$saveToEs$1.apply(EsSpark.scala:67)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
at org.apache.spark.scheduler.Task.run(Task.scala:89)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:227)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.elasticsearch.hadoop.rest.EsHadoopNoNodesLeftException: Connection error (check network and/or proxy settings)- all nodes failed; tried [[127.0.0.11:9200]]
at org.elasticsearch.hadoop.rest.NetworkClient.execute(NetworkClient.java:142)
at org.elasticsearch.hadoop.rest.RestClient.execute(RestClient.java:434)
at org.elasticsearch.hadoop.rest.RestClient.execute(RestClient.java:414)
at org.elasticsearch.hadoop.rest.RestClient.execute(RestClient.java:418)
at org.elasticsearch.hadoop.rest.RestClient.get(RestClient.java:122)
at org.elasticsearch.hadoop.rest.RestClient.esVersion(RestClient.java:564)
at org.elasticsearch.hadoop.rest.InitializationUtils.discoverEsVersion(InitializationUtils.java:178)
... 10 more