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From "Michael Ho (Code Review)" <>
Subject [Impala-ASF-CR] IMPALA-4856: Port data stream service to KRPC
Date Thu, 09 Nov 2017 00:42:11 GMT
Michael Ho has posted comments on this change. ( )

Change subject: IMPALA-4856: Port data stream service to KRPC

Patch Set 13:


Rebased. Removed a scoped timer which is racy, removed unneeded WARN_UNUSED_RESULTS and fixed
some clang-tidy errors.
File be/src/runtime/
PS10, Line 408: // Dequeues the deferred batch an
> not needed.
PS10, Line 425: deferred_rpcs_.push(move(ctx));
> can be done without holding the lock.
PS10, Line 562: // Add all batches to the same queu
There is a subtle race condition here. receiver may be closed already at this point so we
need to do something similar to CANCEL_SAFE_SCOPED_TIMER(). However, the race may still happen
if that macro is not used under the sender queue's lock. Removed from this patch for now and
it will be added back in a follow on patch which introduces more diagnostics information.
PS10, Line 569: sender_queues_[use_sender_id]->De
Same comment as AddBatch().
File be/src/runtime/row-batch.h:
PS10, Line 145: 
> typo.

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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Ic0b8c1e50678da66ab1547d16530f88b323ed8c1
Gerrit-Change-Number: 8023
Gerrit-PatchSet: 13
Gerrit-Owner: Michael Ho <>
Gerrit-Reviewer: Dan Hecht <>
Gerrit-Reviewer: Michael Ho <>
Gerrit-Reviewer: Mostafa Mokhtar <>
Gerrit-Reviewer: Sailesh Mukil <>
Gerrit-Comment-Date: Thu, 09 Nov 2017 00:42:11 +0000
Gerrit-HasComments: Yes

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