Todd Lipcon created KUDU-1964:
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Summary: OpenSSL locks create scalability bottleneck
Key: KUDU-1964
URL: https://issues.apache.org/jira/browse/KUDU-1964
Project: Kudu
Issue Type: Bug
Components: impala, perf, security
Affects Versions: 1.3.0
Reporter: Todd Lipcon
I'm running a concurrent workload against impala and took a pstack where I
noticed that most of the kudu threads are stuck in a stack that looks like:
#6 0x000000348d6e807b in ERR_get_state () from /usr/lib64/libcrypto.so.10
#7 0x000000348d6e881d in ERR_clear_error () from /usr/lib64/libcrypto.so.10
#8 0x00007f33fdecb834 in
kudu::security::TlsHandshake::Continue(std::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char,
std::char_traits<char>, std::allocator<char> >*) () from
/opt/cloudera/parcels/CDH-5.11.0-1.cdh5.11.0.p0.16/lib/impala/lib/libkudu_client.so.0
https://konradzemek.com/2015/08/16/asio-ssl-and-scalability/ notes the same
issue but unfortnuately has no good solution aside from switching to BoringSSL
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