[jira] [Created] (KUDU-1964) OpenSSL locks create scalability bottleneck

["Todd Lipcon (JIRA)" <ji...@apache.org>]

Todd Lipcon created KUDU-1964:
---------------------------------

             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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