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https://issues.apache.org/jira/browse/HDFS-4056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477485#comment-13477485
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Kan Zhang commented on HDFS-4056:
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bq. After this change SIMPLE + SIMPLE will work just as it always has.
How? If I'm not mistaken, this JIRA tries to make the internal auth always use
DIGEST-MD5 (i.e, tokens). SIMPLE auth (i.e., no security) will not be supported
for internal auth (e.g., when user jobs authenticate to NN).
bq. Based on discussions in HADOOP-8758 and HADOOP-8779, the agreement was to
always enable tokens.
I'm sorry if I left you with that impression and I realized I didn't make my
opinion on whether tokens should "always" be used clear. I'll add a comment to
HADOOP-8779. As I explained above, I think there is value in keeping the use of
tokens optional.
> Always start the NN's SecretManager
> -----------------------------------
>
> Key: HDFS-4056
> URL: https://issues.apache.org/jira/browse/HDFS-4056
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: HDFS-4056.patch
>
>
> To support the ability to use tokens regardless of whether kerberos is
> enabled, the NN's secret manager should always be started.
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