[tor-bugs] #6638 [Tor Relay]: Lots of Unknown Error in tor.log

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#6638: Lots of Unknown Error in tor.log
-----------------------+----------------------------------------------------
 Reporter:  oyvinds    |          Owner:                    
     Type:  defect     |         Status:  new               
 Priority:  trivial    |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor Relay  |        Version:  Tor: unspecified  
 Keywords:             |         Parent:                    
   Points:             |   Actualpoints:                    
-----------------------+----------------------------------------------------
Changes (by oyvinds):

  * priority:  major => trivial


Comment:

 Aug 20 15:50:48.000 [info] rend_service_introduce(): Received INTRODUCE2
 cell for service "$service" on circ 20680.
 Aug 20 15:50:48.000 [info] rend_service_introduce(): Accepted intro;
 launching circuit to [scrubbed] (cookie A3FF904F) for service $service.
 Aug 20 15:50:50.000 [info] rend_service_rendezvous_has_opened(): Done
 building circuit 20713 to rendezvous with cookie A3FF904F for service
 $service
 Aug 20 15:50:50.000 [info] rend_service_introduce(): Received INTRODUCE2
 cell for service "$service" on circ 20683.
 Aug 20 15:50:50.000 [info] rend_service_introduce(): We received an
 INTRODUCE2 cell with same first part of Diffie-Hellman handshake 2 seconds
 ago. Dropping cell.
 Aug 20 15:50:50.000 [warn] unknown error for INTRODUCE2 on circ 20683


 Aug 20 16:02:03.000 [info] rend_service_rendezvous_has_opened(): Done
 building circuit 3267 to rendezvous with cookie 199D1382 for service
 $service
 Aug 20 16:02:04.000 [info] rend_service_introduce(): Received INTRODUCE2
 cell for service "$service" on circ 20680.
 Aug 20 16:02:04.000 [info] rend_service_introduce(): Accepted intro;
 launching circuit to [scrubbed] (cookie 1983E8BE) for service $service.
 Aug 20 16:02:04.000 [info] connection_exit_begin_conn(): begin is for
 rendezvous. configuring stream.
 Aug 20 16:02:04.000 [info] connection_exit_begin_conn(): begin is for
 rendezvous. configuring stream.
 Aug 20 16:02:05.000 [info] rend_service_introduce(): Received INTRODUCE2
 cell for service "$service" on circ 20683.
 Aug 20 16:02:05.000 [info] rend_service_introduce(): We received an
 INTRODUCE2 cell with same first part of Diffie-Hellman handshake 1 seconds
 ago. Dropping cell.
 Aug 20 16:02:05.000 [warn] unknown error for INTRODUCE2 on circ 20683


 Aug 20 16:10:59.000 [info] circuit_build_failed(): Couldn't connect to
 Alice's chosen rend point "$9F89491CAB7B03685DEABD358E193FFA74D8D836"
 (non-last hop failed).
 Aug 20 16:10:59.000 [info] rend_service_relaunch_rendezvous():
 Reattempting rendezvous circuit to '[scrubbed]'
 Aug 20 16:11:00.000 [info] connection_exit_begin_conn(): begin is for
 rendezvous. configuring stream.
 Aug 20 16:11:00.000 [info] rend_service_relaunch_rendezvous():
 Reattempting rendezvous circuit to '[scrubbed]'
 Aug 20 16:11:01.000 [info] rend_service_rendezvous_has_opened(): Done
 building circuit 46785 to rendezvous with cookie 8F56BED6 for service
 $service
 Aug 20 16:11:01.000 [info] rend_service_rendezvous_has_opened(): Done
 building circuit 3331 to rendezvous with cookie 68AC6DF4 for service
 $service
 Aug 20 16:11:01.000 [info] rend_service_introduce(): Received INTRODUCE2
 cell for service "$service" on circ 20683.
 Aug 20 16:11:01.000 [info] rend_service_introduce(): We received an
 INTRODUCE2 cell with same first part of Diffie-Hellman handshake 4 seconds
 ago. Dropping cell.
 Aug 20 16:11:01.000 [warn] unknown error for INTRODUCE2 on circ 20683


 The line "We received an INTRODUCE2 cell with same first part of Diffie-
 Hellman handshake some seconds ago. Dropping cell." is always there before
 the unknown error. It seems they are sending Diffie-Hellman handshakes
 with the same first part and that cases the unknown error.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/6638#comment:4>
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