exceptions.ValueError: I/O operation on closed file

this is from clam.dev.bm, 2014-03-05 21:11:04:

root@chameleon:/var/lib/check_mk/logwatch# cat clam.dev.bitmask.i/\\var\\log\\soledad.log 
<<<2014-03-05 17:24:11 WARN>>>
W 2014-03-05 17:23:55+0000 [-] Timing out client: IPv4Address(TCP, '181.114.116.25', 16764)
<<<2014-03-05 21:11:11 CRIT>>>
C 2014-03-05 21:11:04+0000 [-] WSGI application error
. Traceback (most recent call last):
. File "/usr/lib/python2.7/dist-packages/twisted/python/threadpool.py", line 195, in _worker
. o = self.q.get()
. File "/usr/lib/python2.7/dist-packages/twisted/python/context.py", line 118, in callWithContext
. return self.currentContext().callWithContext(ctx, func, *args, **kw)
. File "/usr/lib/python2.7/dist-packages/twisted/python/context.py", line 83, in callWithContext
. self.contexts.pop()
. File "/usr/lib/python2.7/dist-packages/twisted/web/wsgi.py", line 340, in run
. self.started = True
. ---  ---
. File "/usr/lib/python2.7/dist-packages/twisted/web/wsgi.py", line 315, in run
. appIterator = self.application(self.environ, self.startResponse)
. File "/usr/lib/python2.7/dist-packages/leap/soledad/server/__init__.py", line 386, in application
. return application(environ, start_response)
. File "/usr/lib/python2.7/dist-packages/leap/soledad/server/gzip_middleware.py", line 51, in __call__
. app_iter = self.app(environ, dummy_start_response)
. File "/usr/lib/python2.7/dist-packages/leap/soledad/server/auth.py", line 295, in __call__
. return self._app(environ, start_response)
. File "/usr/lib/python2.7/dist-packages/leap/soledad/server/__init__.py", line 156, in __call__
. return http_app.HTTPApp.__call__(self, environ, start_response)
. File "/usr/lib/python2.7/dist-packages/u1db/remote/http_app.py", line 581, in __call__
. HTTPInvocationByMethodWithBody(resource, environ, self)()
. File "/usr/lib/python2.7/dist-packages/u1db/remote/http_app.py", line 543, in __call__
. line = body_getline()
. File "/usr/lib/python2.7/dist-packages/u1db/remote/http_app.py", line 93, in getline
. chunk = self.read_chunk(self.MAXCHUNK)
. File "/usr/lib/python2.7/dist-packages/u1db/remote/http_app.py", line 85, in read_chunk
. data = self.rfile.read(min(self.remaining, atmost))
. File "/usr/lib/python2.7/dist-packages/twisted/web/wsgi.py", line 94, in read
. return self._wrapped.read(size)
C exceptions.ValueError: I/O operation on closed file
.
C 2014-03-05 21:11:04+0000 [-] Unhandled Error
. Traceback (most recent call last):
. File "/usr/lib/python2.7/dist-packages/twisted/application/app.py", line 402, in startReactor
. self.config, oldstdout, oldstderr, self.profiler, reactor)
. File "/usr/lib/python2.7/dist-packages/twisted/application/app.py", line 323, in runReactorWithLogging
. reactor.run()
. File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 1192, in run
. self.mainLoop()
. File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 1201, in mainLoop
. self.runUntilCurrent()
. ---  ---
. File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 797, in runUntilCurrent
. f(*a, **kw)
C File "/usr/lib/python2.7/dist-packages/twisted/web/wsgi.py", line 331, in wsgiError
. self.request.finish()
. File "/usr/lib/python2.7/dist-packages/twisted/web/server.py", line 231, in finish
. return http.Request.finish(self)
. File "/usr/lib/python2.7/dist-packages/twisted/web/http.py", line 885, in finish
. "Request.finish called on a request after its connection was lost; "
C exceptions.RuntimeError: Request.finish called on a request after its connection was lost; use Request.notifyFinish to keep track of this.
.
<<<2014-03-06 06:39:42 WARN>>>
W 2014-03-06 06:39:13+0000 [-] Timing out client: IPv4Address(TCP, '181.114.116.25', 54853)

(from redmine: created on 2014-03-06)