Andrew Sherman has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/12297 )

Change subject: IMPALA-8138: Reintroduce rpc debugging options
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Patch Set 1:

(1 comment)

This all looks good but I have questions...

http://gerrit.cloudera.org:8080/#/c/12297/1/be/src/runtime/krpc-backend-client.h
File be/src/runtime/krpc-backend-client.h:

http://gerrit.cloudera.org:8080/#/c/12297/1/be/src/runtime/krpc-backend-client.h@28
PS1, Line 28: class KrpcBackendClient : public ControlServiceProxy
> Hmm...what about DataStreamService ? This seems to be a client for ControlS
Should this class show that it is a decorated form of ControlServiceProxy, 
perhaps by having ControlServiceProxy as part of it's name?  
ControlServiceProxyInjected? ControlServiceProxyDecorated?

I think this change introduces a convention, that we expect ControlServiceProxy 
methods to be overridden in KrpcBackendClient? If that's so then a comment 
somewhere should say that. Is it in fact now a mistake to use 
ControlServiceProxy?

It seems like KrpcBackendClient is mostly boilerplate. Did you consider 
extending protoc-gen-krpc.cc to either generate the decorated methods in 
ControlServiceProxy, or to generate KrpcBackendClient?



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I2046cb9dadf846ea90c04e95781b2bbde3325941
Gerrit-Change-Number: 12297
Gerrit-PatchSet: 1
Gerrit-Owner: Thomas Marshall <[email protected]>
Gerrit-Reviewer: Andrew Sherman <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Michael Ho <[email protected]>
Gerrit-Comment-Date: Wed, 30 Jan 2019 20:24:49 +0000
Gerrit-HasComments: Yes

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