[tor-bugs] #30926 [Core Tor/Tor]: OnionPerf requests to onion service fail close towards completion with TGEN/READ error

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#30926: OnionPerf requests to onion service fail close towards completion with
TGEN/READ error
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 Reporter:  karsten            |          Owner:  (none)
     Type:  defect             |         Status:  needs_information
 Priority:  Medium             |      Milestone:  Tor: 0.4.1.x-final
Component:  Core Tor/Tor       |        Version:
 Severity:  Normal             |     Resolution:
 Keywords:  041-should tor-hs  |  Actual Points:
Parent ID:                     |         Points:
 Reviewer:                     |        Sponsor:
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Comment (by arma):

 Replying to [comment:3 asn]:
 > We get this in the service side 5 seconds before the client connection
 closes:
 > {{{
 > Jan 02 20:16:57.000 [info] connection_edge_process_relay_cell(): sendme
 cell dropped, unknown stream (streamid 64043).
 > }}}

 That's potentially normal -- this is a stream-level sendme from the client
 to the service. The service will expect to get one of these after sending
 250KBytes. If the service finishes sending the file, it will send an end
 cell, thus closing the stream from its perspective. If the end cell is
 heading toward the client, while the sendme cell is heading toward the
 service, then when it arrives at the service, the service will no longer
 remember what stream 64043 was.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30926#comment:4>
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