/**
* Get a delegation token for the user from the JobTracker.
*
* @param renewer the user who can renew the token
* @return the new token
* @throws IOException
*/
public Token<DelegationTokenIdentifier> getDelegationToken(Text renewer)
throws IOException, InterruptedException {
Token<DelegationTokenIdentifier> result = client.getDelegationToken(renewer);
InetSocketAddress addr = Master.getMasterAddress(conf);
StringBuilder service = new StringBuilder();
service.append(NetUtils.normalizeHostName(addr.getAddress().getHostAddress()));
service.append(':');
service.append(addr.getPort());
result.setService(new Text(service.toString()));
return result;
}
/**
* verify _HOST substitution
*
* @throws IOException
*/
@Test
public void testGetJTPrincipal() throws IOException {
String serviceName = "jt/";
String hostName = "foo";
String domainName = "@BAR";
Configuration conf = new Configuration();
conf.set(MRConfig.FRAMEWORK_NAME, MRConfig.CLASSIC_FRAMEWORK_NAME);
conf.set(JTConfig.JT_IPC_ADDRESS, hostName + ":8888");
conf.set(JTConfig.JT_USER_NAME, serviceName + SecurityUtil.HOSTNAME_PATTERN + domainName);
assertEquals(
"Failed to substitute HOSTNAME_PATTERN with hostName",
serviceName + hostName + domainName,
Master.getMasterPrincipal(conf));
}