Hello Thomas Marshall, Tim Armstrong, Bikramjeet Vig, Impala Public Jenkins,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/11615
to look at the new patch set (#2).
Change subject: IMPALA-4063: Merge report of query fragment instances per
executor
......................................................................
IMPALA-4063: Merge report of query fragment instances per executor
Previously, each fragment instance executing on an executor will
independently report its status to the coordinator periodically.
This creates a huge amount of RPCs to the coordinator under highly
concurrent workloads, causing lock contention in the coordinator's
backend states as each fragment instance tries to them at the same
time. In addition, due to the lack of coordination between query
fragment instances, a query may end without collecting the profiles
from all fragment instances when one of them hits an error before
another fragment instance manages to finish calling Prepare(), leading
to missing profiles for certain fragment instances.
This change fixes the problem above by making a thread per QueryState
(started by QueryExecMgr) to be responsible for periodically reporting
the status and profiles of all fragment instances of a query running
on a backend. As part of this refactoring, each query fragment instance
will not report their errors individually. Instead, there is a cumulative
status maintained per QueryState. It's set to the error status of the first
fragment instance which hits an error or any general error (e.g. failure
to start a thread) when starting fragment instances. With this change,
the status reporting threads are also removed.
Testing done: exhaustive tests
This patch is based on a patch by Sailesh Mukil
Change-Id: I5f95e026ba05631f33f48ce32da6db39c6f421fa
---
M be/src/runtime/coordinator-backend-state.cc
M be/src/runtime/coordinator-backend-state.h
M be/src/runtime/coordinator.cc
M be/src/runtime/coordinator.h
M be/src/runtime/fragment-instance-state.cc
M be/src/runtime/fragment-instance-state.h
M be/src/runtime/query-exec-mgr.cc
M be/src/runtime/query-exec-mgr.h
M be/src/runtime/query-state.cc
M be/src/runtime/query-state.h
M be/src/service/client-request-state.cc
M be/src/service/client-request-state.h
M be/src/service/control-service.cc
M common/protobuf/control_service.proto
M common/thrift/RuntimeProfile.thrift
M
testdata/workloads/functional-query/queries/QueryTest/udf-non-deterministic.test
M testdata/workloads/functional-query/queries/QueryTest/udf.test
17 files changed, 375 insertions(+), 426 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/15/11615/2
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I5f95e026ba05631f33f48ce32da6db39c6f421fa
Gerrit-Change-Number: 11615
Gerrit-PatchSet: 2
Gerrit-Owner: Michael Ho <k...@cloudera.com>
Gerrit-Reviewer: Bikramjeet Vig <bikramjeet....@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Michael Ho <k...@cloudera.com>
Gerrit-Reviewer: Thomas Marshall <thomasmarsh...@cmu.edu>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
