[jira] [Commented] (IMPALA-9367) Allow specifying MEMORY kerberos credential cache

["Tim Armstrong (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IMPALA-9367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17032764#comment-17032764 ] 

Tim Armstrong commented on IMPALA-9367:
---------------------------------------

This may not actually be possible, because the Java side of Impala shares a ticket cache with the C++ side, but it doesn't look like the Java implementation of kerberos supports the same in-memory credential cache.

> Allow specifying MEMORY kerberos credential cache
> -------------------------------------------------
>
>                 Key: IMPALA-9367
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9367
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Security
>            Reporter: Tim Armstrong
>            Assignee: Tim Armstrong
>            Priority: Major
>              Labels: kerberos
>
> Currently --krb5_ccname defaults to "/tmp/krb5cc_impala_internal" and requires that the argument be an absolute path.
> Kudu actually defaults to "MEMORY:kudu" as its credential cache, which may have some advantages, e.g. it doesn't depend on the filesystem.
> It would be reasonable to allow setting the credential cache type to MEMORY.



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