Hi, I was working on a project which use twisted.web2 scgi.I chose apache2 as the front end web server.the apache2 server will receive a http POST message which carry about 200k-1M data.I found that sometimes I get the correct answer but sometimes there is a exception: Traceback (most recent call last): File "//usr/lib64/python2.5/site-packages/twisted/python/log.py", line 84, in callWithLogger return callWithContext({"system": lp}, func, *args, **kw) File "//usr/lib64/python2.5/site-packages/twisted/python/log.py", line 69, in callWithContext return context.call({ILogContext: newCtx}, func, *args, **kw) File "/usr/lib64/python2.5/site-packages/twisted/python/context.py", line 59, in callWithContext return self.currentContext().callWithContext(ctx, func, *args, **kw) File "/usr/lib64/python2.5/site-packages/twisted/python/context.py", line 37, in callWithContext return func(*args,**kw) --- <exception caught here> --- File "/usr/lib64/python2.5/site-packages/twisted/internet/selectreactor.py", line 146, in _doReadOrWrite why = getattr(selectable, method)() File "/usr/lib64/python2.5/site-packages/twisted/internet/tcp.py", line 463, in doRead return self.protocol.dataReceived(data) File "/usr/lib64/python2.5/site-packages/twisted/web2/channel/scgi.py", line 72, in dataReceived self.request.handleContentChunk(data) File "/usr/lib64/python2.5/site-packages/twisted/web2/http.py", line 393, in handleContentChunk self.stream.write(data) File "/usr/lib64/python2.5/site-packages/twisted/web2/http.py", line 331, in write stream.ProducerStream.write(self, data) File "/usr/lib64/python2.5/site-packages/twisted/web2/stream.py", line 667, in write self.producer.pauseProducing() exceptions.AttributeError: SCGIChannelRequest instance has no attribute 'pauseProducing' it seems the error is from the twisted.web2 module,usually when the data is very big,I will get this exception.how to avoid this exception? I have to transfer the data in one request anyway. Any suggestion is helpful.Thank you! Regards Chris