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https://issues.apache.org/jira/browse/FLINK-3857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15339006#comment-15339006
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ASF GitHub Bot commented on FLINK-3857:
---------------------------------------

Github user tzulitai commented on a diff in the pull request:

    https://github.com/apache/flink/pull/1962#discussion_r67636398
  
    --- Diff: 
flink-streaming-connectors/flink-connector-elasticsearch2/src/main/java/org/apache/flink/streaming/connectors/elasticsearch2/ElasticsearchSink.java
 ---
    @@ -153,9 +165,96 @@ public ElasticsearchSink(Map<String, String> 
userConfig, List<InetSocketAddress>
         */
        @Override
        public void open(Configuration configuration) {
    +           TransportClient transportClient = connect();
    +
    +           if (checkConnectionStatus(transportClient)) {
    +                   client = transportClient;
    +           }
    --- End diff --
    
    retry in open() if not connected to any nodes?


> Add reconnect attempt to Elasticsearch host
> -------------------------------------------
>
>                 Key: FLINK-3857
>                 URL: https://issues.apache.org/jira/browse/FLINK-3857
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming Connectors
>    Affects Versions: 1.1.0, 1.0.2
>            Reporter: Fabian Hueske
>            Assignee: Subhobrata Dey
>
> Currently, the connection to the Elasticsearch host is opened in 
> {{ElasticsearchSink.open()}}. In case the connection is lost (maybe due to a 
> changed DNS entry), the sink fails.
> I propose to catch the Exception for lost connections in the {{invoke()}} 
> method and try to re-open the connection for a configurable number of times 
> with a certain delay.



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