On Wed, Jan 30, 2013 at 11:03:15AM +0800, Liu H. wrote:
I am writing a http handler module, I found when the last buffer
in the output buffer chain is zero, I’ll get an alert in the
error log about zero output buffer, and the browser will get no
response after waiting a while, this is not what I am expecting
as the buffer chain has data, just the last one has zero size.
Does this a feature or I missed something else?
Zero size buffers are not expected to appear in the output chain
except due to some bug, and if they do appear - it’s considered to
be a fatal error and results in a connection close.
Normally you should not add empty buffers to the output chain. If
there are some good reasons why you need to add an empty buffer -
you have to mark the buffer as special, e.g., by setting the
b->sync flag as Jeff Kaufman already suggested.