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tracker problems
http://forums.degreez.net/viewtopic.php?f=4&t=7138		 Page 1 of 1
Author:  cartman-2000 [ Sun Apr 08, 2007 5:18 am ]
Post subject:  tracker problems
I keep on getting this error when I run a tracker. And it crashes like every minute or two.

The tracker has about 4000 peers and is running on a machine with python 2.3.3 installed.

Code:
Traceback (most recent call last):
  File "/root/BitTornado-CVS/BitTornado/RawServer.py", line 142, in listen_forever
    self.sockethandler.handle_events(events)
  File "/root/BitTornado-CVS/BitTornado/SocketHandler.py", line 319, in handle_events
    s.handler.data_came_in(s, data)
  File "/root/BitTornado-CVS/BitTornado/HTTPHandler.py", line 155, in data_came_in
    if not c.data_came_in(data) and not c.closed:
  File "/root/BitTornado-CVS/BitTornado/HTTPHandler.py", line 46, in data_came_in
    self.next_func = self.next_func(val)
  File "/root/BitTornado-CVS/BitTornado/HTTPHandler.py", line 78, in read_header
    r = self.handler.getfunc(self, self.path, self.headers)
  File "/root/BitTornado-CVS/BitTornado/BT1/track.py", line 917, in get
    rsize = self.add_data(infohash, event, ip, paramslist)
  File "/root/BitTornado-CVS/BitTornado/BT1/track.py", line 692, in add_data
    bc[1][myid] = bc[0][myid]
KeyError: 'exbc\x01\x01LORDv\xc6\xea\xd7\xfc.\xc6\x7f\xe7\xe6'
Author:  steveholt [ Sun Apr 29, 2007 5:07 pm ]
Post subject:  Re: tracker problems
cartman-2000 wrote:
Code:
Traceback (most recent call last):
  File "/root/BitTornado-CVS/BitTornado/RawServer.py", line 142, in listen_forever
    self.sockethandler.handle_events(events)
  File "/root/BitTornado-CVS/BitTornado/SocketHandler.py", line 319, in handle_events
    s.handler.data_came_in(s, data)
  File "/root/BitTornado-CVS/BitTornado/HTTPHandler.py", line 155, in data_came_in
    if not c.data_came_in(data) and not c.closed:
  File "/root/BitTornado-CVS/BitTornado/HTTPHandler.py", line 46, in data_came_in
    self.next_func = self.next_func(val)
  File "/root/BitTornado-CVS/BitTornado/HTTPHandler.py", line 78, in read_header
    r = self.handler.getfunc(self, self.path, self.headers)
  File "/root/BitTornado-CVS/BitTornado/BT1/track.py", line 917, in get
    rsize = self.add_data(infohash, event, ip, paramslist)
  File "/root/BitTornado-CVS/BitTornado/BT1/track.py", line 692, in add_data
    bc[1][myid] = bc[0][myid]
KeyError: 'exbc\x01\x01LORDv\xc6\xea\xd7\xfc.\xc6\x7f\xe7\xe6'


I get the same error, though with a different key of course. It only occurs when a peer changes from a downloader to a seed. It also only seemed to start happening when I changed --nat_check to 0 to solve some connection problems I was having. It solved those problems, but created this one.
Author:  steveholt [ Thu May 10, 2007 6:16 pm ]
Post subject: 
I was able to prevent this error using this minor change. Change this (around line 692):
Code:
for bc in self.becache[infohash]:
    bc[1][myid] = bc[0][myid]
    del bc[0][myid]

to this:
Code:
for bc in self.becache[infohash]:
    if bc[0].has_key(myid):
        bc[1][myid] = bc[0][myid]
        del bc[0][myid]


to be safe, you can also make a similar change a few lines below (around line 699) from this:
Code:
for bc in self.becache[infohash]:
    bc[0][myid] = bc[1][myid]
    del bc[1][myid]

to this:
Code:
for bc in self.becache[infohash]:
    if bc[1].has_key(myid):
        bc[0][myid] = bc[1][myid]
        del bc[1][myid]

this one will only occur rarely though, when a peer changes from a seed to a downloader.

I haven't noticed any side effects of this change (other than the error going away), but maybe theShadow can confirm this.
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