Hello Alexey Serbin, Abhishek Chennaka, Wenzhe Zhou,
I'd like you to do a code review. Please visit
http://gerrit.cloudera.org:8080/19948
to review the following change.
Change subject: KUDU-3248 improve replica selection initialization
......................................................................
KUDU-3248 improve replica selection initialization
Since the original implementation stored the random choice for replica
selection integer in a variable that was initialized statically, the
corresponding calls to libstdc++/libc++ runtime had been issued before
the process called the main() function. That means some SSE4.2-specific
instructions might be called since libkudu_client is unconditionally
compiled with -msse4.2 flag, and there'd been no chance to call
KuduClientBuilder::Build() that would verify the required features are
present by calling CheckCPUFlags(). As a result, an attempt to run
an application linked with kudu_client library at a machine lacking
SSE4.2 support would result in a crash with SIGILL signal and a stack
trace like below:
#0 0x00007fc4b1b58162 in std::mersenne_twister_engine<...>::_M_gen_rand
at include/c++/7.5.0/bits/random.tcc:408
#1 std::mersenne_twister_engine<...>::operator()
at include/c++/7.5.0/bits/random.tcc:459
#2 0x00007fc4b1b1d65d in kudu::client::(anonymous
namespace)::InitRandomSelectionInt
at ../../../../../src/kudu/client/client-internal.cc:196
#3 0x00007fc4b1b1d6ef in __static_initialization_and_destruction_0
at ../../../../../src/kudu/client/client-internal.cc:198
#4 _GLOBAL__sub_I_client_internal.cc(void)
at ../../../../../src/kudu/client/client-internal.cc:871
This patch addresses that deficiency, so now instead of unexpectedly
crashing, the application would return an error upon at attempt to
create an instance of KuduClient object.
This is a follow-up to ccbbfb3006314f2c37f3a40bfec355db9fc90e02.
Change-Id: I11c2a29ef69a8c97c68330d261fdff64accebb0b
Reviewed-on: http://gerrit.cloudera.org:8080/19828
Reviewed-by: Abhishek Chennaka <[email protected]>
Reviewed-by: Wenzhe Zhou <[email protected]>
Tested-by: Alexey Serbin <[email protected]>
---
M src/kudu/client/client-internal.cc
1 file changed, 18 insertions(+), 11 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/48/19948/1
--
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Gerrit-Project: kudu
Gerrit-Branch: branch-1.17.x
Gerrit-MessageType: newchange
Gerrit-Change-Id: I11c2a29ef69a8c97c68330d261fdff64accebb0b
Gerrit-Change-Number: 19948
Gerrit-PatchSet: 1
Gerrit-Owner: Yingchun Lai <[email protected]>
Gerrit-Reviewer: Abhishek Chennaka <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Wenzhe Zhou <[email protected]>
