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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2020/02/05 16:56:36 UTC

[GitHub] [flink] walterddr commented on a change in pull request #10891: [FLINK-15561][Security][hotfix] Add Delegation Token checker in YarnClusterDescriptor

walterddr commented on a change in pull request #10891: [FLINK-15561][Security][hotfix] Add Delegation Token checker in YarnClusterDescriptor
URL: https://github.com/apache/flink/pull/10891#discussion_r375381727
 
 

 ##########
 File path: flink-yarn/src/main/java/org/apache/flink/yarn/YarnClusterDescriptor.java
 ##########
 @@ -435,9 +436,13 @@ public void killCluster(ApplicationId applicationId) throws FlinkException {
 			UserGroupInformation loginUser = UserGroupInformation.getCurrentUser();
 			if (loginUser.getAuthenticationMethod() == UserGroupInformation.AuthenticationMethod.KERBEROS
 					&& useTicketCache && !loginUser.hasKerberosCredentials()) {
-				LOG.error("Hadoop security with Kerberos is enabled but the login user does not have Kerberos credentials");
-				throw new RuntimeException("Hadoop security with Kerberos is enabled but the login user " +
+				// a delegation token is an adequate substitute in most cases
 
 Review comment:
   +1 moving to HadoopUtils makes more sense to me actually - if I understand correctly, delegation Token is a hadoop concept; Kerberos official doc seems to only contain a guidance on credential delegation: https://tools.ietf.org/html/rfc5896.html.
   
   I will make the adjustment accordingly

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