org.apache.hadoop.security.SecurityUtil
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## Class org.apache.hadoop.security.`SecurityUtil`

Removed Methods
`Policy` `getPolicy`() | Get the current global security policy for Hadoop.
`Subject` `getSubject`(`UserGroupInformation`) | Get the Subject for the user identified by `ugi`.
`void` `setPolicy`(`Policy`) | Set the global security policy for Hadoop.

Added Methods
`String` `buildDTServiceName`(`URI,` int) | create service name for Delegation token ip:port
`void` `fetchServiceTicket`(`URL`) | Explicitly pull the service ticket for the specified host.
`AccessControlList` `getAdminAcls`(`Configuration,` String) | Get the ACL object representing the cluster administrators The user who starts the daemon is automatically added as an admin
`String` `getServerPrincipal`(`String,` String) | Convert Kerberos principal name pattern to valid Kerberos principal names.
`String` `getServerPrincipal`(`String,` InetAddress) | Convert Kerberos principal name pattern to valid Kerberos principal names.
`boolean` `isOriginalTGT`(`String`) |
`void` `login`(`Configuration,` String, String) | If a keytab has been provided login as that user.
`void` `login`(`Configuration,` String, String, String) | If a keytab has been provided login as that user.

Added Fields
`String` `HOSTNAME_PATTERN` |
`Log` `LOG` |

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