[Buildbot-commits] [Buildbot] #2027: Unhandled error in Deferred (0.8.4p1)

[Buildbot]

#2027: Unhandled error in Deferred (0.8.4p1)
--------------------+--------------------
Reporter:  dberger  |       Owner:
    Type:  defect   |      Status:  new
Priority:  trivial  |   Milestone:  0.8.5
 Version:  0.8.4p1  |  Resolution:
Keywords:  web      |
--------------------+--------------------
Changes (by dustin):

 * keywords:   => web
 * priority:  major => trivial
 * milestone:  undecided => 0.8.5


Old description:

> I see this frequently in the buildmaster logs, though I haven't yet been
> able to correlate it with user-visible event(s)
>

> 2011-06-29 17:08:03-0700 [-] Unhandled error in Deferred:
> 2011-06-29 17:08:03-0700 [-] Unhandled Error
>         Traceback (most recent call last):
>           File
> "E:\build_master\external\Twisted-11.0.0\twisted\internet\defer.py", line
> 542, in _runCallbacks
>             current.result = callback(current.result, *args, **kw)
>           File
> "E:\build_master\external\Twisted-11.0.0\twisted\internet\defer.py", line
> 791, in _cbDeferred
>             self.callback(self.resultList)
>           File
> "E:\build_master\external\Twisted-11.0.0\twisted\internet\defer.py", line
> 361, in callback
>             self._startRunCallbacks(result)
>           File
> "E:\build_master\external\Twisted-11.0.0\twisted\internet\defer.py", line
> 455, in _startRunCallbacks
>             self._runCallbacks()
>         --- <exception caught here> ---
>           File
> "E:\build_master\external\Twisted-11.0.0\twisted\internet\defer.py", line
> 542, in _runCallbacks
>             current.result = callback(current.result, *args, **kw)
>           File
> "E:\build_master\external\buildbot-0.8.4p1\buildbot\status\web\base.py",
> line 319, in ok
>             request.finish()
>           File
> "E:\build_master\external\Twisted-11.0.0\twisted\web\http.py", line 866,
> in finish
>             "Request.finish called on a request after its connection was
> lost; "
>         exceptions.RuntimeError: Request.finish called on a request after
> its connection was lost; use Request.notifyFinish to keep track of this.

New description:

 I see this frequently in the buildmaster logs, though I haven't yet been
 able to correlate it with user-visible event(s)

 {{{
 2011-06-29 17:08:03-0700 [-] Unhandled error in Deferred:
 2011-06-29 17:08:03-0700 [-] Unhandled Error
         Traceback (most recent call last):
           File
 "E:\build_master\external\Twisted-11.0.0\twisted\internet\defer.py", line
 542, in _runCallbacks
             current.result = callback(current.result, *args, **kw)
           File
 "E:\build_master\external\Twisted-11.0.0\twisted\internet\defer.py", line
 791, in _cbDeferred
             self.callback(self.resultList)
           File
 "E:\build_master\external\Twisted-11.0.0\twisted\internet\defer.py", line
 361, in callback
             self._startRunCallbacks(result)
           File
 "E:\build_master\external\Twisted-11.0.0\twisted\internet\defer.py", line
 455, in _startRunCallbacks
             self._runCallbacks()
         --- <exception caught here> ---
           File
 "E:\build_master\external\Twisted-11.0.0\twisted\internet\defer.py", line
 542, in _runCallbacks
             current.result = callback(current.result, *args, **kw)
           File
 "E:\build_master\external\buildbot-0.8.4p1\buildbot\status\web\base.py",
 line 319, in ok
             request.finish()
           File
 "E:\build_master\external\Twisted-11.0.0\twisted\web\http.py", line 866,
 in finish
             "Request.finish called on a request after its connection was
 lost; "
         exceptions.RuntimeError: Request.finish called on a request after
 its connection was lost; use Request.notifyFinish to keep track of this.
 }}}

--

Comment:

 This is common, and harmless.  Basically what's happening is that the
 browser is severing the connection before Buildbot has finished producing
 data.  You can reproduce it by clicking a button (e.g., force build)
 repeatedly.

 I'm not sure what the best way is to avoid the traceback.

-- 
Ticket URL: <http://trac.buildbot.net/ticket/2027#comment:1>
Buildbot <http://buildbot.net/>
Buildbot: build/test automation