Amazon EMR
The Big Data Tools plugin let you monitor clusters and nodes in the Amazon EMR data processing platform.
Create a connection to AWS EMR
In the Big Data Tools window, click
and select AWS EMR under the Data Processing Platforms section.The Big Data Tools Connections dialog opens.
Mandatory parameters:
Name: the name of the connection to distinguish it between the other connections.
Optionally, you can set up:
Select if you want to specify a custom endpoint or a region. You can select a region from the list or let IntelliJ IDEA autodetect it.
Authentication type: the authentication method. You can use your account credentials (by default), or opt to enter the access and secret keys. You can also use a named profile that is located in the default AWS config location (~/.aws/credentials on Linux or macOS, or C:\Users\<USERNAME>\.aws\credentials on Windows). If needed you can specify any profile from a custom credential file.
Per project: select to enable these connection settings only for the current project. Deselect it if you want this connection to be visible in other projects.
Enable connection: deselect if you want to restrict using this connection. By default, the newly created connections are enabled.
HTTP Proxy: select if you want to use IDE proxy settings or if you want to specify custom proxy settings.
Click the Open SSH Key Settings link to create an SSH connection authenticated with a private key file. You need to specify the Amazon EC2 key pair private key in the EMR SSH Keystore dialog.
Once you fill in the settings, click Test connection to ensure that all configuration parameters are correct. Then click OK.
At any time, you can open the connection settings in one of the following ways:
Go to the Tools | Big Data Tools Settings page of the IDE settings Ctrl+Alt+S.
Click
on the AWS EMR tool window toolbar.
Once you have established a connection to the server, the AWS EMR tool window appears.
The window consists of the several areas to monitor clusters:
This tab shows details about the selected cluster. You can start typing any parameter name in the Search field and it will be highlighted in the list of parameters.
Obtain more info
You can preview the cluster details in the web interface. Click
or the Open Subnet, Muster Security Group, or Core and Tasks Security Group.Click
to establish an SFTP connection to the target server, then specify the path to the config file in your file system.You can preview EMR logs for the selected cluster. Click
to open the logs in the Big Data Tools tool window. 
For JSON representation of the selected cluster configuration, click
.
This tab shows application steps, their IDs, and execution status. You can start typing any ID or name in the Search field and it will be selected in the list of steps.
Manage steps
Click
to preview the application step in the web interface.You can add more steps of different types. Click
and select a step type to add. Then, specify its parameters. 
Click
to duplicate the selected step.For JSON representation of the selected cluster configuration, click
.
This tab shows details about instances of the selected cluster. You can start typing any instance name in the Search field and it will be selected.
View instances
You can preview the instance details in the web interface by clicking
. You can also click 
to show or hide a particular parameter of instances.Click
to establish an SFTP connection to the target server, then specify the path to the config file in your file system.For JSON representation of the selected cluster configuration, click
.
This tab shows applications running on the selected cluster. Click to preview the cluster details in your default web browser.
Open Amazon EMR applications
IntelliJ IDEA lets you open applications installed on your Amazon EMR cluster. Connections to applications are based on SSH tunneling, so you'll have to provide SSH keys configured in the cluster. For tools that are supported by the Big Data Tools plugin (such as Hadoop, HDFS, Hive, Spark, or Zeppelin), a new connection will be displayed in the Big Data Tools tool window, and a new application tool window or tab will appear. For example, if you connect to a Zeppelin server, you can open and edit a Zeppelin note in the editor. For tools that are not supported by the plugin, clicking an application will open its web interface in your browser.
In the AWS EMR tool window, select your Amazon EMR cluster.
Open the Applications tab and, in the Name column, click the link to an application.
If this is the first time you try to connect to an application, you will be prompted to create a connection. Click Create and in the dialog that opens select your SSH key file, for example
mykey.pem.Once your SSH keys are loaded, you can connect to applications of this cluster just by clicking its name in the Applications tab.