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https://issues.apache.org/jira/browse/KUDU-2265?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexey Serbin updated KUDU-2265:
--------------------------------
Status: In Review (was: Open)
> A non-leader master uses self-signed server TLS cert if it hasn't ever run as
> a leader
> --------------------------------------------------------------------------------------
>
> Key: KUDU-2265
> URL: https://issues.apache.org/jira/browse/KUDU-2265
> Project: Kudu
> Issue Type: Improvement
> Components: master, security
> Affects Versions: 1.3.0, 1.3.1, 1.4.0, 1.6.0, 1.50
> Reporter: Alexey Serbin
> Assignee: Alexey Serbin
> Priority: Major
>
> As it's currently implemented, master process replaces its auto-generated
> self-signed server TLS certificate with CA-signed one only when it becomes a
> leader (see {{{color:#333333}CatalogManager::InitCertAuthorityWith(){color}}}
> method; it's invoked only from \{{CatalogManager::InitCertAuthority()}}, that
> is invoked only from \{{CatalogManager::PrepareForLeadershipTask()}}).
>
> In case of just one Raft election from the start (which is pretty common,
> BTW), non-leader masters run without CA-signed server certificate for a long
> time in case of a multi-master configuration. That causes clients to not use
> their authn tokens for authentication while connecting to those non-leader
> masters. In case of Spark applications where executors do not have Kerberos
> credentials (the common case), application logs are polluted with messages
> like below:
> {noformat}
> org.apache.kudu.client.NonRecoverableException: Server requires Kerberos, but
> this client is not authenticated (kinit)
> at org.apache.kudu.client.Negotiator.evaluateChallenge(Negotiator.java:705)
> at org.apache.kudu.client.Negotiator.sendSaslInitiate(Negotiator.java:581)
> ...
> Caused by: javax.security.sasl.SaslException: GSS initiate failed [Caused by
> GSSException: No valid credentials provided (Mechanism level: Failed to find
> any Kerberos tgt)]
> at
> com.sun.security.sasl.gsskerb.GssKrb5Client.evaluateChallenge(GssKrb5Client.java:211){noformat}
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