Flink Elasticsearch Async

[Rex Fenley]

Hello,

Looking at this documentation https://ci.apache.org/projects/flink/flink-docs-release-1.12/dev/table/connectors/elasticsearch.html#sink-bulk-flush-interval it says

> The interval to flush buffered actions. Can be set to '0' to disable it. Note, both 'sink.bulk-flush.max-size' and 'sink.bulk-flush.max-actions' can be set to '0' with the flush interval set allowing for complete async processing of buffered actions.

Does this imply that if either max size and max actions are set to not 0 that bulk indexing is not asynchronous?

We've been investigating socket time outs for some time now and are looking for a way to fix. If things are synchronous that may be a contributing factor.

Thanks

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