hadoopInputFormat and elasticsearch

[aviad <ro...@gmail.com>]

Hi,

I want to write batch job which reads data from *elasticsearch* using
*elasticsearch-hadoop* (https://github.com/elastic/elasticsearch-hadoop/)
and *hadoopInputFormat*

example code (from
https://github.com/genged/flink-playground/blob/master/src/main/java/com/mic/flink/FlinkMain.java):



elasticsearch-hadoop creates one Hadoop InputSplit (tasks) per Elasticsearch
shard.
so if my index have 20 shards, it will be split to 20 InputSplit


/My question is:/
What will happen if my job restart (failover) after finishing half of the
InputSplit's ?
Does hadoopInputFormat remember which InputSplit are finished and knows how
to continue from where it stopped? (maybe read from beginning of unfinished
InputSplit? ) or it starts from the beginning?

thanks



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Re: hadoopInputFormat and elasticsearch

[Andrey Zagrebin <an...@data-artisans.com>]

Hi,

At the moment if the processing of any data input split fails,
Flink will restart the batch job completely from scratch.

There is an ongoing effort to improve fine-grained recovery in FLINK-4256.

Best,
Andrey

> On 2 Oct 2018, at 13:52, aviad <ro...@gmail.com> wrote:
> 
> Hi,
> 
> I want to write batch job which reads data from *elasticsearch* using
> *elasticsearch-hadoop* (https://github.com/elastic/elasticsearch-hadoop/)
> and *hadoopInputFormat*
> 
> example code (from
> https://github.com/genged/flink-playground/blob/master/src/main/java/com/mic/flink/FlinkMain.java):
> 
> 
> 
> elasticsearch-hadoop creates one Hadoop InputSplit (tasks) per Elasticsearch
> shard.
> so if my index have 20 shards, it will be split to 20 InputSplit
> 
> 
> /My question is:/
> What will happen if my job restart (failover) after finishing half of the
> InputSplit's ?
> Does hadoopInputFormat remember which InputSplit are finished and knows how
> to continue from where it stopped? (maybe read from beginning of unfinished
> InputSplit? ) or it starts from the beginning?
> 
> thanks
> 
> 
> 
> --
> Sent from: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/