[tor-bugs] #16501 [- Select a component]: 7 hsdir calls

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#16501: 7 hsdir calls
----------------------------------+---------------------
 Reporter:  cypherpunks           |          Owner:
     Type:  defect                |         Status:  new
 Priority:  normal                |      Milestone:
Component:  - Select a component  |        Version:
 Keywords:                        |  Actual Points:
Parent ID:                        |         Points:
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 I have a small threaded program that connects to the tor socks port and
 issues a GET request on hidden services.

 I noticed that if it makes 7 concurrent calls to one hidden service, then
 all of the requests will fail immediately.

 If it makes 6 concurrent calls then it is successful, for anything more
 than 6, a pause or sleep between calls was needed.

 I think it is calling all 6 hsdirs and not waiting for a reply from any of
 them, and with the 7th call it fails all 7 requests on the spot.

 Relevant log lines:

 X 7 times
 {{{
 [info] connection_ap_handshake_rewrite_and_attach(): Got a hidden service
 request for ID 'mmmmmmmmmmmmmmmm'
 [info] connection_ap_handshake_rewrite_and_attach(): Unknown descriptor
 mmmmmmmmmmmmmmmm. Fetching.
 }}}

 X 3 times, each time to a different hsdir
 {{{
 [info] directory_get_from_hs_dir(): Sending fetch request for v2
 descriptor for service 'mmmmmmmmmmmmmmmm' with descriptor ID
 'iddddddddddddddddddd111111111111', auth type 0, and descriptor cookie
 '[none]' to hidden service directory
 $fffffffffffffffff11111111111111111111111~nickname at aaa.aaa.aaa.aaa
 }}}

 X 3 times, each time to a different hsdir
 {{{
 [info] directory_get_from_hs_dir(): Sending fetch request for v2
 descriptor for service 'mmmmmmmmmmmmmmmm' with descriptor ID
 'iddddddddddddddddddd222222222222', auth type 0, and descriptor cookie
 '[none]' to hidden service directory
 $xxxxxxxxxxxxxxxxx22222222222222222222222~nickname at bbb.bbb.bbb.bbb
 }}}

 {{{
 [info] directory_get_from_hs_dir(): Could not pick one of the responsible
 hidden service directories, because we requested them all recently without
 success.
 [info] rend_client_refetch_v2_renddesc(): Could not pick one of the
 responsible hidden service directories to fetch descriptors, because we
 already tried them all unsuccessfully.
 [notice] Closing stream for 'mmmmmmmmmmmmmmmm.onion': hidden service is
 unavailable (try again later).
 [info] rend_client_note_connection_attempt_ended(): Connection attempt for
 mmmmmmmmmmmmmmmm has ended; cleaning up temporary state.
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16501>
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