tElasticSearchConfiguration properties for Apache Spark Streaming

Nodes

Enter the location of the cluster hosting the Elasticsearch system to be used.

The Nodes parameter is mandatory and eventually taken into account only when the Elasticsearch component to be connected to Elasticsearch uses the Elasticsearch Node Client, that is to say, the tElasticSearchInput component and the tElasticSearchOutput component.

For further information about the Elasticsearch Node Client and the Elasticsearch Transport Client, see https://www.elastic.co/guide/en/elasticsearch/guide/current/_transport_client_versus_node_client.html.

Transport addresses

Enter the addresses of the Elasticsearch nodes you need the component to connect to.

This parameter is required when your Elasticsearch Job, exactly speaking, tElasticSearchLookupInput in your Job, to use the Elasticsearch Transport Client to connect to the Elasticsearch cluster to be used. If you do not use Elasticsearch Transport Client, leave empty double quotation marks ("") in this field.

For further information about the Elasticsearch Node Client and the Elasticsearch Transport Client, see https://www.elastic.co/guide/en/elasticsearch/guide/current/_transport_client_versus_node_client.html.

Cluster name

Enter the name the Elasticsearch cluster to be used.

This parameter is required when your Elasticsearch Job, exactly speaking, tElasticSearchLookupInput in your Job, to use the Elasticsearch Transport Client to connect to the Elasticsearch cluster to be used. If you do not use Elasticsearch Transport Client, leave empty double quotation marks ("") in this field.

Use SSL/TLS

Select this check box to enable the SSL or TLS encrypted connection.

Then you need to use the tSetKeystore component in the same Job to specify the encryption information.

User authentication

If the Elasticsearch system to be used requires authentication information, select this check box and enter the credentials.

To enter the password, click the [...] button next to the password field, enter the password in double quotes in the pop-up dialog box, and click OK to save the settings.

Configuration

Add the parameters accepted by Elasticsearch to perform more customized actions.

For example, enter es.mapping.id in the Key column and true in the Value column to make the document field/property name contain the document ID. Note that you must put double quotation marks around the entered information.

For a list of the parameters you can use, see https://www.elastic.co/guide/en/elasticsearch/hadoop/master/configuration.html.

Connection pool

In this area, you configure, for each Spark executor, the connection pool used to control the number of connections that stay open simultaneously. The default values given to the following connection pool parameters are good enough for most use cases.

• Max total number of connections: enter the maximum number of connections (idle or active) that are allowed to stay open simultaneously.

  The default number is 8. If you enter -1, you allow unlimited number of open connections at the same time.

• Max waiting time (ms): enter the maximum amount of time at the end of which the response to a demand for using a connection should be returned by the connection pool. By default, it is -1, that is to say, infinite.

• Min number of idle connections: enter the minimum number of idle connections (connections not used) maintained in the connection pool.

• Max number of idle connections: enter the maximum number of idle connections (connections not used) maintained in the connection pool.

Evict connections

Select this check box to define criteria to destroy connections in the connection pool. The following fields are displayed once you have selected it.

• Time between two eviction runs: enter the time interval (in milliseconds) at the end of which the component checks the status of the connections and destroys the idle ones.

• Min idle time for a connection to be eligible to eviction: enter the time interval (in milliseconds) at the end of which the idle connections are destroyed.

• Soft min idle time for a connection to be eligible to eviction: this parameter works the same way as Min idle time for a connection to be eligible to eviction but it keeps the minimum number of idle connections, the number you define in the Min number of idle connections field.

Usage rule

This component is used with no need to be connected to other components.

This component, along with the Spark Streaming component Palette it belongs to, appears only when you are creating a Spark Streaming Job.

Note that in this documentation, unless otherwise explicitly stated, a scenario presents only Standard Jobs, that is to say traditional Talend data integration Jobs.

Spark Connection

This connection is effective on a per-Job basis.