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_r368648299
##########
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:
Yes. this is the expected result. See:
https://github.com/apache/flink/blob/master/flink-runtime/src/main/java/org/apache/flink/runtime/security/modules/HadoopModule.java#L146
which is used in client/JM/TM.
However I think the checker in here not present - this means specifically in
YarnClusterDescriptor it does not support delegation token. This seems like a
bug to me.
Regarding the implementation, yes I can do that as well (e.g. merging with
the upper layer if, I was trying to pair the code logic with `HadoopModule`.
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