[jira] [Commented] (HADOOP-14445) Delegation tokens are not shared between KMS instances

["Daryn Sharp (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-14445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16279134#comment-16279134 ] 

Daryn Sharp commented on HADOOP-14445:
--------------------------------------

bq.  This way we'd require all clients to update their config (remove kp) after the upgrade though.

Eventually, yes, but there should be no rush.  The client is going to use the kp specified by the NN.  It only falls back to conf when the NN is old and cannot tell the client if it uses a kp or not.

> Delegation tokens are not shared between KMS instances
> ------------------------------------------------------
>
>                 Key: HADOOP-14445
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14445
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: documentation, kms
>    Affects Versions: 2.8.0, 3.0.0-alpha1
>            Reporter: Wei-Chiu Chuang
>            Assignee: Rushabh S Shah
>         Attachments: HADOOP-14445-branch-2.8.patch
>
>
> As discovered in HADOOP-14441, KMS HA using LoadBalancingKMSClientProvider do not share delegation tokens. (a client uses KMS address/port as the key for delegation token)
> {code:title=DelegationTokenAuthenticatedURL#openConnection}
> if (!creds.getAllTokens().isEmpty()) {
>         InetSocketAddress serviceAddr = new InetSocketAddress(url.getHost(),
>             url.getPort());
>         Text service = SecurityUtil.buildTokenService(serviceAddr);
>         dToken = creds.getToken(service);
> {code}
> But KMS doc states:
> {quote}
> Delegation Tokens
> Similar to HTTP authentication, KMS uses Hadoop Authentication for delegation tokens too.
> Under HA, A KMS instance must verify the delegation token given by another KMS instance, by checking the shared secret used to sign the delegation token. To do this, all KMS instances must be able to retrieve the shared secret from ZooKeeper.
> {quote}
> We should either update the KMS documentation, or fix this code to share delegation tokens.



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