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https://issues.apache.org/jira/browse/TS-1935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14601707#comment-14601707
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Bryan Call commented on TS-1935:
--------------------------------
This is no longer an issue with HTTPS since the state machine is not created if
there are no bytes sent for ATS 6.0.0.
Debug of client closing the connection:
{code}
[Jun 25 11:41:48.512] Server {0x7fff73d0f300} DEBUG: <SSLNetVConnection.cc:201
(ssl_read_from_net)> (ssl) [SSL_NetVConnection::ssl_read_from_net]
b->write_avail()=4096
[Jun 25 11:41:48.512] Server {0x7fff73d0f300} DEBUG: <SSLNetVConnection.cc:208
(ssl_read_from_net)> (ssl) [SSL_NetVConnection::ssl_read_from_net] nread=0
[Jun 25 11:41:48.512] Server {0x7fff73d0f300} DEBUG: <SSLNetVConnection.cc:767
(do_io_close)> (ssl-shutdown) previous shutdown state 0x0
[Jun 25 11:41:48.512] Server {0x7fff73d0f300} DEBUG: <SSLNetVConnection.cc:773
(do_io_close)> (ssl-shutdown) new SSL_set_shutdown 0x2
[Jun 25 11:41:48.512] Server {0x7fff73d0f300} DEBUG: <SSLNetVConnection.cc:589
(net_read_io)> (ssl) read_from_net, read finished - 0 useful bytes read, bytes
used by SSL layer
{code}
Debug of server closing the connection:
{code}
[Jun 25 11:42:52.362] Server {0x7fff73d0f300} DEBUG: <SSLNetVConnection.cc:767
(do_io_close)> (ssl-shutdown) previous shutdown state 0x0
[Jun 25 11:42:52.362] Server {0x7fff73d0f300} DEBUG: <SSLNetVConnection.cc:773
(do_io_close)> (ssl-shutdown) new SSL_set_shutdown 0x2
[Jun 25 11:42:52.362] Server {0x7fff73d0f300} DEBUG: <SSLUtils.cc:1588
(ssl_callback_info)> (ssl) ssl_callback_info ssl: 0x7fdf80f4d580 where: 16392
ret: 256
[Jun 25 11:42:52.362] Server {0x7fff73d0f300} DEBUG: <SSLNetVConnection.cc:788
(do_io_close)> (ssl-shutdown) SSL_shutdown success
{code}
> ERR_UNKNOWN/000 showing up 10.4% of the time in production logs
> ---------------------------------------------------------------
>
> Key: TS-1935
> URL: https://issues.apache.org/jira/browse/TS-1935
> Project: Traffic Server
> Issue Type: Bug
> Reporter: Bryan Call
> Assignee: Bryan Call
> Fix For: 6.0.0
>
>
> Need to investigate in what conditions this happens.
> * Keep-alive or not
> * If any requests have happened on the connection
> * Is the client or the server closing the connection at the time
> * Verify no bytes have been sent from the client, looking at the code it
> looks like it
> Ideally if the client has not sent any bytes (has not attempted to make a
> request) then we shouldn't log the error message. If it is possible a state
> machine should not be created in this scenario.
> related bug:
> TS-1056
> related checkin:
> 425e3d7dcb16b40075c7678e71d00b2fcb4b4705
> I also see this happening in on my forward proxy using Chrome:
> [bcall@homer trafficserver]$ traffic_logcat -f squid.blog | grep 000
> 1370281253.174 0 192.168.1.30 ERR_UNKNOWN/000 0 - / - EMPTY/- - -
> 1370281253.450 0 192.168.1.30 ERR_UNKNOWN/000 0 - / - EMPTY/- - -
> 1370281253.891 0 192.168.1.30 ERR_UNKNOWN/000 0 - / - EMPTY/- - -
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