kpumuk opened a new pull request, #3307:
URL: https://github.com/apache/thrift/pull/3307

   <!-- Explain the changes in the pull request below: -->
   
   Currently `Thrift::NonblockingServer` does not work when configured with SSL 
sockets:
   
   ```
   $ THRIFT_TLS=true bundle exec rake benchmark /usr/local/bin/ruby 
benchmark/benchmark.rb
   Starting server...
   #<Thread:0x0000ffff817cb718 benchmark/server.rb:87 run> terminated with 
exception (report_on_exception is true):
   /thrift/src/lib/rb/lib/thrift/server/nonblocking_server.rb:48:in 
'Kernel#select': can't convert Thrift::SSLServerSocket to IO 
(Thrift::SSLServerSocket#to_io gives OpenSSL::SSL::SSLServer) (TypeError)
   
               rd, = select([@server_transport], nil, nil, 0.1)
                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
           from 
/thrift/src/lib/rb/lib/thrift/server/nonblocking_server.rb:48:in 'block in 
Thrift::NonblockingServer#serve'
           from 
/thrift/src/lib/rb/lib/thrift/server/nonblocking_server.rb:45:in 'Kernel#loop'
           from 
/thrift/src/lib/rb/lib/thrift/server/nonblocking_server.rb:45:in 
'Thrift::NonblockingServer#serve'
           from benchmark/server.rb:88:in 'block in Server.start_server'
   ```
   
   This is happening because `#to_io` on the SSL socket returns the wrapped 
handler instead of the underlying socket.
   
   After the change we get a clear output:
   
   ```
   $ THRIFT_TLS=true bundle exec rake benchmark
   /usr/local/bin/ruby benchmark/benchmark.rb
   Starting server...
   Spawning benchmark processes...
   Collecting output...
   Translating output...
   Analyzing output...
   
   Server class:        Thrift::NonblockingServer
   Server interpreter:  ruby 
   Client interpreter:  ruby
   Protocol type:       binary
   Socket class:        Thrift::SSLSocket 
   Number of processes: 40
   Clients per process: 5
   Calls per client:    50
   Using fastthread:    no
   
   Connection failures:                0 
   Connection errors:                  0
   Average time per call:              0.0033 seconds
   Average time per client (50 calls): 0.2159 seconds
   Total time for all calls:           32.5091 seconds
   Real time for benchmarking:         2.7874 seconds
   Shortest call time:                 0.0001 seconds
   Longest call time:                  0.0213 seconds
   Shortest client time (50 calls):    0.0560 seconds
   Longest client time (50 calls):     0.3463 seconds
   ```
   
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