aljoscha 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_r374031205
##########
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:
We could also move the whole block, i.e.
```
if (securityConfig.useTicketCache() && !loginUser.hasKerberosCredentials()) {
// a delegation token is an adequate
substitute in most cases
if
(!HadoopUtils.hasHDFSDelegationToken()) {
LOG.warn("Hadoop security is
enabled but current login user does not have Kerberos credentials");
}
}
```
to `HadoopUtils` and use it in both `HadoopModule` and this code, thus
reducing code duplication.
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