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Posted to issues-all@impala.apache.org by "Michael Ho (JIRA)" <ji...@apache.org> on 2018/11/14 19:37:00 UTC
[jira] [Updated] (IMPALA-4860) Stagger impala TGS_REQ to KDC
[ https://issues.apache.org/jira/browse/IMPALA-4860?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael Ho updated IMPALA-4860:
-------------------------------
Labels: kerberos scalability supportability (was: scalability supportability)
> Stagger impala TGS_REQ to KDC
> -----------------------------
>
> Key: IMPALA-4860
> URL: https://issues.apache.org/jira/browse/IMPALA-4860
> Project: IMPALA
> Issue Type: Improvement
> Components: Distributed Exec, Security
> Affects Versions: Impala 2.6.0, Impala 2.7.0, Impala 2.8.0
> Reporter: Mala Chikka Kempanna
> Priority: Major
> Labels: kerberos, scalability, supportability
>
> During initial startup when first query is run on cluster or at end of --kerberos_reinit_interval, each impala daemon sends out N-1 number of TGS_REQ to KDC where N is the number of impala daemons. This amounts to N(N-1) TGS_REQ at once going from impala service to KDC.
> This tends to overload KDC server.
> The request here is to stagger these TGS_REQ requests so all of them do not hit KDC at the same time.
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