Dan Hecht has posted comments on this change.

Change subject: IMPALA-2987: Distinguish between already-closed and never-seen 
data stream receivers
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Patch Set 5:

(2 comments)

http://gerrit.cloudera.org:8080/#/c/2305/5//COMMIT_MSG
Commit Message:

Line 34:   already_unregistered=false, and cancel).
Given the discussion in the change review, do we still believe this to be the 
requirement? i.e. wasn't the thought to make it illegal to close the exchange 
before the sender finishes?  (though I need to think about this more).


http://gerrit.cloudera.org:8080/#/c/2305/5/be/src/runtime/data-stream-mgr.cc
File be/src/runtime/data-stream-mgr.cc:

Line 45: /// higher will increase the size of the stream cache (which is 48 
bytes per receiver).
In the case it doesn't outlive all calls to FindRecvrOrWait() for that stream 
ID, what is the consequence?  (And I think worth noting that in the comment).


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Gerrit-MessageType: comment
Gerrit-Change-Id: Ib1734992c7199b9dd4b03afca5372022051b6fbd
Gerrit-PatchSet: 5
Gerrit-Project: Impala
Gerrit-Branch: cdh5-2.5.0_5.7.0
Gerrit-Owner: Henry Robinson <[email protected]>
Gerrit-Reviewer: Dan Hecht <[email protected]>
Gerrit-Reviewer: Henry Robinson <[email protected]>
Gerrit-Reviewer: Sailesh Mukil <[email protected]>
Gerrit-Reviewer: Skye Wanderman-Milne <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-HasComments: Yes

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