Hi, Our Oozie team recently found that YARN-4126 <https://issues.apache.org/jira/browse/YARN-4126> appears to introduce an incompatible change into Hadoop 2.8.0. Namely, it removes delegation tokens from being used in a non-secure cluster. Clients, such as Oozie, that were previously using a delegation token regardless of security, now fail. That's okay for Hadoop 3, but this was also committed to Hadoop 2.8.0. Perhaps we should revert this? YARN-4126 was also not marked as incompatible...
Caused by: java.io.IOException: Delegation Token can be issued only with kerberos authentication at org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getDelegationToken(ClientRMService.java:1065) ... 10 more There's more details on YARN-5750 <https://issues.apache.org/jira/browse/YARN-5750>, but I thought I'd try to bring more attention to this by sending out and email. thanks - Robert
