Overview

Use this account type to connect Hadoop Snaps with data sources that use Kerberos accounts.

Prerequisites

None.

Limitations

The security model configured for the Groundplex (SIMPLE or KERBEROS authentication) must match the security model of the remote server. Due to limitations of the Hadoop library, we are only able to create the necessary internal credentials for the configuration of the Groundplex.

Known Issues

None.

Account Settings

Field Name	Field Type	Description

Field Name	Field Type	Description
Label Default Value: N/A Example: Kerberos Account	String
Client Principal Default Value: N/A Example: snaplogic/EXAMPLE.COM@ATHENA.MIT.EDU	String	Specify the client principal associated with the account.
Keytab File Default Value: N/A Example: /keytabs/snaplogic.keytab	String	Specify the path to the Keytab file.
Hadoop config directory Default Value: N/A Example: /etc/hadoop/config	String/Expression	Specify the path of the Hadoop configuration files to read the Hadoop configuration for a specific instance of a Hadoop cluster. The account uses the config files from this path to initialize the Hadoop object and establishes a connection with the Hadoop cluster. When you specify a path in this field, the account overrides the value set on the Snaplex system property. This enables you to create multiple Kerberos accounts, each configured to read Hadoop configurations for more than one cluster. A pipeline can then include multiple instances of the Read or Write Snap, each using a unique account from the account list. If you leave this field blank, the account uses the path in the Snaplex configuration. If the specified Hadoop config locations (either in the account settings or the Snaplex configuration) are invalid, then the Snap generates default security configurations to use.

Troubleshooting

Error Message	Reason	Resolution

Error Message

Reason

Resolution

Failed to validate account: Kerberos keytab file does not exist or cannot be read.

Specify the location of the keytab file.

This typically means that the Keytab File or Client Principal details provided are incorrect.

Verify if the provided credentials are correct.

Cannot locate default realm

This error appears when the value in the Client Principal field is not in the format expected.

Failure in URL connection or file access denial, detail: SIMPLE authentication is not enabled. Available:[TOKEN, KERBEROS]

Either the value in the Hadoop config directory field or the Node properties is empty or the configuration directory is invalid.

Specify a valid path for the Hadoop configuration files.