[tahoe-lafs-trac-stream] [tahoe-lafs] #685: [needs test] Capability of interrupted downloads is logged in twistd.log

[tahoe-lafs]

#685: [needs test] Capability of interrupted downloads is logged in twistd.log
-------------------------+-------------------------------------------------
     Reporter:  zooko    |      Owner:  somebody
         Type:  defect   |     Status:  new
     Priority:  major    |  Milestone:  soon
    Component:  code     |    Version:  1.3.0
   Resolution:           |   Keywords:  logging memory privacy
Launchpad Bug:           |  confidentiality test-needed
-------------------------+-------------------------------------------------
Description changed by zooko:

Old description:

> I happened to see this in the twisted.log of a Tahoe-1.3.0 node (the
> testgrid web gateway):
>
> {{{
> 2009-04-22 17:05:34.866Z [-] Unhandled Error
>         Traceback (most recent call last):
>         Failure: exceptions.RuntimeError: Producer was not unregistered
> for
> /uri/URI%3ADIR2%3Adjrdkfawoqihigoett4g6auz6a%3Ajx5mplfpwexnoqff7y5e4zjus4lidm76dcuarpct7cckorh2dpgq
> /Axe_Versus_Laptop-theora-videoquality5-audioquality3.ogv
> }}}
>
> As far as I can tell, the register/unregister producer code in
> [source:src/allmydata/immutable/download.py] hasn't changed since before
> the v1.3.0 release, so I suspect this bug is still here in trunk.  I
> assume that it doesn't cause any actual trouble beyond noise in the
> {{{twistd.log}}}...  Or does it?  Maybe it wastes some memory?  I guess
> the next step is to find this error message in the Twisted code base
> (Twisted v2.5.0 was used here).

New description:

 I happened to see this in the twisted.log of a Tahoe-1.3.0 node (the
 testgrid web gateway):

 {{{
 2009-04-22 17:05:34.866Z [-] Unhandled Error
         Traceback (most recent call last):
         Failure: exceptions.RuntimeError: Producer was not unregistered
 for
 /uri/URI%3ADIR2%3Adjrdkfawoqihigoett4g6auz6a%3Ajx5mplfpwexnoqff7y5e4zjus4lidm76dcuarpct7cckorh2dpgq
 /Axe_Versus_Laptop-theora-videoquality5-audioquality3.ogv
 }}}

 As far as I can tell, the register/unregister producer code in
 [source:src/allmydata/immutable/download.py] hasn't changed since before
 the v1.3.0 release, so I suspect this bug is still here in trunk.  I
 assume that it doesn't cause any actual trouble beyond noise in the
 {{{twistd.log}}}...  Or does it?  Maybe it wastes some memory?  I guess
 the next step is to find this error message in the Twisted code base
 (Twisted v2.5.0 was used here).

 This is part of a cluster of tickets including: #562, #563, #685, #887,
 #1008, and #1904.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/685#comment:12>
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