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When you select the Custom option from the Distribution drop-down list, you are connecting to a Hadoop distribution different from any of the Hadoop distributions provided on that Distribution list in Talend Studio.
About this task
After selecting this Custom option, click [...] to display the Import custom definition dialog box and proceed as follows:
Note that custom versions are not officially supported by Talend . Talend and its community provide you with the opportunity to connect to custom versions from Talend Studio but cannot guarantee that the configuration of whichever version you choose will be easy, due to the wide range of different Hadoop distributions and versions that are available. As such, you should only attempt to set up such a connection if you have sufficient Hadoop experience to handle any issues on your own.
Procedure
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Depending on your situation, select Import from existing
version or Import from zip to
configure the custom Hadoop distribution to be connected to.
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If you have the configuration zip file of the custom Hadoop distribution you need to connect to, select Import from zip.
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Otherwise, select Import from existing version to import an officially supported Hadoop distribution as base so as to customize it by following the wizard. Adopting this approach requires knowledge about the configuration of the Hadoop distribution to be used.
Note that the check boxes in the wizard allow you to select the Hadoop elements you need to import. All the check boxes are not always displayed in your wizard depending on the context in which you are creating the connection. For example, if you are creating this connection for Spark, then only the Spark check box appears. -
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Click OK and then in the pop-up warning, click
Yes to accept overwriting any custom setup of JAR
files previously implemented.
Once done, the Custom Hadoop version definition dialog box becomes active.
This dialog box lists the Hadoop elements and their jar files you are importing. -
Click OK to validate the changes and to close the
Select libraries dialog box.
Once done, the selected jar file appears on the list in the tab of the Hadoop element being configured.Note that if you need to share the custom Hadoop setup with another Talend Studio, you can export this custom connection from the Custom Hadoop version definition window using the
button.
Results
Now that the configuration of the custom Hadoop version has been set up and you are back to the Hadoop connection configuration view, you are able to continue to enter other parameters required by the connection.
If the custom Hadoop version you need to connect to contains YARN and you want to use it, select the Use YARN check box next to the Distribution list.
A video is available in the following link to demonstrate, by taking HDFS as example, how to set up the connection to a custom Hadoop cluster, also referred to as an unsupported Hadoop distribution: How to add an unsupported Hadoop distribution to the Studio.