Alexey Serbin has posted comments on this change.

Change subject: server_negotiation: improve error handling
......................................................................


Patch Set 1:

(8 comments)

http://gerrit.cloudera.org:8080/#/c/6154/1//COMMIT_MSG
Commit Message:

PS1, Line 12: rpc
nit: RPC


PS1, Line 14: master
nit: master server


http://gerrit.cloudera.org:8080/#/c/6154/1/src/kudu/rpc/server_negotiation.cc
File src/kudu/rpc/server_negotiation.cc:

PS1, Line 562:   
nit: here and elsewhere with the same pattern in this patch consider using

const Status& s = ...;


PS1, Line 567:     case security::VerificationResult::UNKNOWN_SIGNING_KEY:
I would expect this to be along with EXPIRED_TOKEN, etc.  The reason is that in 
rare situations the server might be not in sync with the master in terms of 
fresh TSK (consider the very first startup of the cluster or the startup of the 
cluster after very long delay when all existing TSKs expired).

That looks more like a transient error, and getting a new authn token might 
help.


PS1, Line 582:     // This is a runtime error because there should be no way a 
client could
             :     // get a signed authn token without a subject.
This is not the part of this patch, but while you are at it: I'm not sure this 
is valid reasoning to issue RuntimeError() instead of NotAuthorized -- the 
token comes from the external party (client), not directly from us.  Consider 
replacing with  NotAuthorized here as well.

If not and the reasoning is valid, then the NotAuthorized above should be 
replaced with RuntimeError as well.


PS1, Line 610: ErrorStatusPB::FATAL_INVALID_AUTHENTICATION_TOKEN
I'm not sure this is the right error code to send back.  It seems it should 
have been ErrorStatusPB::FATAL_UNAUTHORIZED or we need an additional 
cert-specific code else.


http://gerrit.cloudera.org:8080/#/c/6154/1/src/kudu/security/token_verifier.cc
File src/kudu/security/token_verifier.cc:

PS1, Line 130: pki
nit: in all other places it's TODO(PKI)

consider using the same upper-case pattern


PS1, Line 162: }
nit: consider adding

return "<unreachable>";

It helps to get rid of warnings from older versions of the gcc compiler.


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Gerrit-MessageType: comment
Gerrit-Change-Id: I64f9c0f59aa608bf5078d65883a7d9a6fb186c04
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Dan Burkert <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <[email protected]>
Gerrit-HasComments: Yes

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