Key | Default | Type | Description
--- | --- | --- | ---
##### security.kerberos.access.hadoopFileSystems | (none) | List<String> | A semicolon-separated list of Kerberos-secured Hadoop filesystems Flink is going to access. For example, security.kerberos.access.hadoopFileSystems=hdfs://namenode2:9002;hdfs://namenode3:9003. The JobManager needs to have access to these filesystems to retrieve the security tokens.
##### security.kerberos.login.contexts | (none) | String | A comma-separated list of login contexts to provide the Kerberos credentials to (for example, `Client,KafkaClient` to use the credentials for ZooKeeper authentication and for Kafka authentication)
##### security.kerberos.login.keytab | (none) | String | Absolute path to a Kerberos keytab file that contains the user credentials.
##### security.kerberos.login.principal | (none) | String | Kerberos principal name associated with the keytab.
##### security.kerberos.login.use-ticket-cache | true | Boolean | Indicates whether to read from your Kerberos ticket cache.
##### security.kerberos.relogin.period | 1 min | Duration | The time period when keytab login happens automatically in order to always have a valid TGT.