masaori335 edited a comment on issue #7915:
URL: https://github.com/apache/trafficserver/issues/7915#issuecomment-853600232


   It looks like `http2/4.2/1` hangs intermittently. Debug logs with 
`http2|ssl` is below.
   
   <details><summary>Debug logs of good case</summary>
   
   ```
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ClientSession.cc:388 
(state_read_connection_preface)> (http2_cs) [3] 
[&Http2ClientSession::state_read_connection_preface, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ClientSession.cc:409 
(state_read_connection_preface)> (http2_cs) [3] received connection preface
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ClientSession.cc:438 
(state_start_frame_read)> (http2_cs) [3] 
[&Http2ClientSession::state_start_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ClientSession.cc:452 
(do_start_frame_read)> (http2_cs) [3] receiving frame header
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ClientSession.cc:469 
(do_start_frame_read)> (http2_cs) [3] frame header length=6, type=4, flags=0x0, 
streamid=0
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:566 
(rcv_settings_frame)> (http2_con) [3] [0] Received SETTINGS frame
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:638 
(rcv_settings_frame)> (http2_con) [3] [0]    INITIAL_WINDOW_SIZE : 65535
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4057
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=0
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:308 
(ssl_read_from_net)> (ssl.error) SSL_ERROR_WOULD_BLOCK(read)
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:719 
(net_read_io)> (ssl) read finished - would block
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:780 
(load_buffer_and_write)> (ssl) towrite=30
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:836 
(load_buffer_and_write)> (ssl) try_to_write=30 written=30 total_written=30
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4057
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=9
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4048
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=25
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4023
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=0
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:308 
(ssl_read_from_net)> (ssl.error) SSL_ERROR_WOULD_BLOCK(read)
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:349 
(ssl_read_from_net)> (ssl) bytes_read=34
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ClientSession.cc:438 
(state_start_frame_read)> (http2_cs) [3] 
[&Http2ClientSession::state_start_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ClientSession.cc:452 
(do_start_frame_read)> (http2_cs) [3] receiving frame header
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ClientSession.cc:469 
(do_start_frame_read)> (http2_cs) [3] frame header length=0, type=4, flags=0x1, 
streamid=0
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:566 
(rcv_settings_frame)> (http2_con) [3] [0] Received SETTINGS frame
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ClientSession.cc:452 
(do_start_frame_read)> (http2_cs) [3] receiving frame header
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ClientSession.cc:469 
(do_start_frame_read)> (http2_cs) [3] frame header length=16, type=1, 
flags=0x4, streamid=1
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:233 
(rcv_headers_frame)> (http2_con) [3] [1] Received HEADERS frame
   [Jun  3 06:20:45.062] [ET_NET 1] DEBUG: <Http2Stream.cc:370 (change_state)> 
(http2_stream) [3] [1] Http2StreamState::HTTP2_STREAM_STATE_OPEN
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4023
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=4023
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4096
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=1872
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=2224
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=2224
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:349 
(ssl_read_from_net)> (ssl) bytes_read=8119
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <Http2ClientSession.cc:438 
(state_start_frame_read)> (http2_cs) [3] 
[&Http2ClientSession::state_start_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <Http2ClientSession.cc:452 
(do_start_frame_read)> (http2_cs) [3] receiving frame header
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <Http2ClientSession.cc:469 
(do_start_frame_read)> (http2_cs) [3] frame header length=16384, type=0, 
flags=0x1, streamid=1
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4096
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=4096
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:349 
(ssl_read_from_net)> (ssl) bytes_read=4096
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <Http2ClientSession.cc:499 
(state_complete_frame_read)> (http2_cs) [3] 
[&Http2ClientSession::state_complete_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4096
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=754
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=3342
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=3342
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:349 
(ssl_read_from_net)> (ssl) bytes_read=4096
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <Http2ClientSession.cc:499 
(state_complete_frame_read)> (http2_cs) [3] 
[&Http2ClientSession::state_complete_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4096
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=82
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4014
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=0
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:308 
(ssl_read_from_net)> (ssl.error) SSL_ERROR_WOULD_BLOCK(read)
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:349 
(ssl_read_from_net)> (ssl) bytes_read=82
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <Http2ClientSession.cc:499 
(state_complete_frame_read)> (http2_cs) [3] 
[&Http2ClientSession::state_complete_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <Http2ClientSession.cc:514 
(state_complete_frame_read)> (http2_cs) [3] completed frame read, 16384 bytes 
available
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:89 
(rcv_data_frame)> (http2_con) [3] [1] Received DATA frame
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <Http2Stream.cc:370 (change_state)> 
(http2_stream) [3] [1] Http2StreamState::HTTP2_STREAM_STATE_HALF_CLOSED_REMOTE
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:176 
(rcv_data_frame)> (http2_con) [3] [1] Received DATA frame: rwnd con=49151/65535 
stream=49151/65535
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4014
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=0
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:308 
(ssl_read_from_net)> (ssl.error) SSL_ERROR_WOULD_BLOCK(read)
   [Jun  3 06:20:45.063] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:719 
(net_read_io)> (ssl) read finished - would block
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:1756 
(send_headers_frame)> (http2_con) [3] [1] Send HEADERS frame
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:1700 
(send_a_data_frame)> (http2_con) [3] [1] Send a DATA frame - client window con: 
65357 stream: 65357 payload:   178
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:1700 
(send_a_data_frame)> (http2_con) [3] [1] Send a DATA frame - client window con: 
65357 stream: 65357 payload:     0
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:1708 
(send_a_data_frame)> (http2_con) [3] [1] END_STREAM
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <Http2Stream.cc:370 (change_state)> 
(http2_stream) [3] [1] Http2StreamState::HTTP2_STREAM_STATE_CLOSED
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:1741 
(send_data_frames)> (http2_con) [3] [1] Shutdown stream
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <Http2Stream.cc:493 
(initiating_close)> (http2_stream) [3] [1] initiating_close
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <Http2Stream.cc:520 
(initiating_close)> (http2_stream) [3] [1] handle write from destroy (event=103)
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <Http2Stream.cc:68 (~Http2Stream)> 
(http2_stream) [3] [1] Destroy stream, sent 178 bytes
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <Http2ConnectionState.cc:1487 
(delete_stream)> (http2_con) [3] [1] Delete stream
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:780 
(load_buffer_and_write)> (ssl) towrite=361
   [Jun  3 06:20:45.064] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:836 
(load_buffer_and_write)> (ssl) try_to_write=361 written=361 total_written=361
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4014
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <SSLUtils.cc:1074 
(ssl_callback_info)> (ssl) ssl_callback_info ssl: 0x7fffe402d070, where: 16388, 
ret: 256, State: SSL negotiation finished successfully
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=0
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:334 
(ssl_read_from_net)> (ssl.error) SSL_ERROR_ZERO_RETURN
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <Http2ClientSession.cc:327 
(main_event_handler)> (http2_cs) [3] Closing event 104
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <Http2ClientSession.cc:239 
(do_io_close)> (http2_cs) [3] session closed
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <Http2ClientSession.cc:78 (destroy)> 
(http2_cs) [3] session destroy
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:1694 
(callHooks)> (ssl) sslHandshakeHookState=7 eventID=108
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:1811 
(callHooks)> (ssl) iterated to curHook=(nil)
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:905 
(do_io_close)> (ssl-shutdown) previous shutdown state 0x2
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:935 
(do_io_close)> (ssl-shutdown) Enable quiet shutdown
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <Http2ClientSession.cc:106 (free)> 
(http2_cs) [3] session free
   [Jun  3 06:20:45.065] [ET_NET 1] DEBUG: <SSLNetVConnection.cc:739 
(net_read_io)> (ssl) read finished - 0 useful bytes read, bytes used by SSL 
layer
   ```
   </details>
   
   <details><summary>Debug logs of bad case </summary>
   
   ```
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <Http2ClientSession.cc:388 
(state_read_connection_preface)> (http2_cs) [8] 
[&Http2ClientSession::state_read_connection_preface, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <Http2ClientSession.cc:409 
(state_read_connection_preface)> (http2_cs) [8] received connection preface
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <Http2ClientSession.cc:438 
(state_start_frame_read)> (http2_cs) [8] 
[&Http2ClientSession::state_start_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <Http2ClientSession.cc:452 
(do_start_frame_read)> (http2_cs) [8] receiving frame header
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <Http2ClientSession.cc:469 
(do_start_frame_read)> (http2_cs) [8] frame header length=6, type=4, flags=0x0, 
streamid=0
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <Http2ConnectionState.cc:566 
(rcv_settings_frame)> (http2_con) [8] [0] Received SETTINGS frame
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <Http2ConnectionState.cc:638 
(rcv_settings_frame)> (http2_con) [8] [0]    INITIAL_WINDOW_SIZE : 65535
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <Http2ClientSession.cc:452 
(do_start_frame_read)> (http2_cs) [8] receiving frame header
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <Http2ClientSession.cc:469 
(do_start_frame_read)> (http2_cs) [8] frame header length=0, type=4, flags=0x1, 
streamid=0
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <Http2ConnectionState.cc:566 
(rcv_settings_frame)> (http2_con) [8] [0] Received SETTINGS frame
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4048
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=0
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:308 
(ssl_read_from_net)> (ssl.error) SSL_ERROR_WOULD_BLOCK(read)
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:719 
(net_read_io)> (ssl) read finished - would block
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:780 
(load_buffer_and_write)> (ssl) towrite=9
   [Jun  3 06:14:04.942] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:836 
(load_buffer_and_write)> (ssl) try_to_write=9 written=9 total_written=9
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4048
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=25
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4023
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=0
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:308 
(ssl_read_from_net)> (ssl.error) SSL_ERROR_WOULD_BLOCK(read)
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:349 
(ssl_read_from_net)> (ssl) bytes_read=25
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ClientSession.cc:438 
(state_start_frame_read)> (http2_cs) [8] 
[&Http2ClientSession::state_start_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ClientSession.cc:452 
(do_start_frame_read)> (http2_cs) [8] receiving frame header
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ClientSession.cc:469 
(do_start_frame_read)> (http2_cs) [8] frame header length=16, type=1, 
flags=0x4, streamid=1
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ConnectionState.cc:233 
(rcv_headers_frame)> (http2_con) [8] [1] Received HEADERS frame
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2Stream.cc:370 (change_state)> 
(http2_stream) [8] [1] Http2StreamState::HTTP2_STREAM_STATE_OPEN
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4023
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=4023
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4096
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=1872
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=2224
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=2224
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:349 
(ssl_read_from_net)> (ssl) bytes_read=8119
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ClientSession.cc:438 
(state_start_frame_read)> (http2_cs) [8] 
[&Http2ClientSession::state_start_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ClientSession.cc:452 
(do_start_frame_read)> (http2_cs) [8] receiving frame header
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ClientSession.cc:469 
(do_start_frame_read)> (http2_cs) [8] frame header length=16384, type=0, 
flags=0x1, streamid=1
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4096
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=4096
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:349 
(ssl_read_from_net)> (ssl) bytes_read=4096
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ClientSession.cc:499 
(state_complete_frame_read)> (http2_cs) [8] 
[&Http2ClientSession::state_complete_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4096
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=754
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=3342
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=3342
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:349 
(ssl_read_from_net)> (ssl) bytes_read=4096
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ClientSession.cc:499 
(state_complete_frame_read)> (http2_cs) [8] 
[&Http2ClientSession::state_complete_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4096
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=82
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4014
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=0
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:308 
(ssl_read_from_net)> (ssl.error) SSL_ERROR_WOULD_BLOCK(read)
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:349 
(ssl_read_from_net)> (ssl) bytes_read=82
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ClientSession.cc:499 
(state_complete_frame_read)> (http2_cs) [8] 
[&Http2ClientSession::state_complete_frame_read, 
VC_EVENT_READ_READY/TS_EVENT_VCONN_READ_READY]
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ClientSession.cc:514 
(state_complete_frame_read)> (http2_cs) [8] completed frame read, 16384 bytes 
available
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ConnectionState.cc:89 
(rcv_data_frame)> (http2_con) [8] [1] Received DATA frame
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2Stream.cc:370 (change_state)> 
(http2_stream) [8] [1] Http2StreamState::HTTP2_STREAM_STATE_HALF_CLOSED_REMOTE
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <Http2ConnectionState.cc:176 
(rcv_data_frame)> (http2_con) [8] [1] Received DATA frame: rwnd con=49151/65535 
stream=49151/65535
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:282 
(ssl_read_from_net)> (ssl) amount_to_read=4014
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:287 
(ssl_read_from_net)> (ssl) nread=0
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:308 
(ssl_read_from_net)> (ssl.error) SSL_ERROR_WOULD_BLOCK(read)
   [Jun  3 06:14:04.943] [ET_NET 0] DEBUG: <SSLNetVConnection.cc:719 
(net_read_io)> (ssl) read finished - would block
   ### got timeout after 10 seconds
   ```
   </details>


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