[IMPALA-7299] Impala fails to work with the krb5 config 'rdns=false' in Impala 2.12.0/3.0

• Type: Task
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Impala 3.0, Impala 2.12.0
• Fix Version/s: Impala 3.1.0
• Component/s: Docs
• Labels: docs
• Target Version: Impala 3.1.0
• Epic Color: ghx-label-6
• Assignee: Alexandra Rodoni
• Reporter: Sailesh Mukil
• Created: 13/Jul/18 22:57
• Updated: 28/May/19 18:16
• Resolved: 16/Jul/18 18:36

Description

Since we've switched to using KRPC from Impala 2.12.0 and Impala 3.0, we found a bug that doesn't allow for kerberized communication if the following flag in krb5.conf is changed from its default of 'rdns=true' to 'rdns=false'.

The current workaround is to set it back to its default of 'true'. Keep in mind that the 'dns_canonicalize_hostname' flag should also be 'true' otherwise the 'rdns' flag will be ignored.

More details on the flag can be found here:
http://web.mit.edu/kerberos/krb5-1.12/doc/admin/conf_files/krb5_conf.html

A fix for this issue is tracked by IMPALA-7298.