> -----Original Message----- > From: Bert Huijben [mailto:b...@qqmail.nl] > Sent: vrijdag 27 november 2015 13:56 > To: b...@qqmail.nl > Subject: > > Hi, > > I finally took the time to diagnose that segfault I had, and I think it > points to a serious bug in httpd. > > To summarize this: I dont receive window updates. > > In this specific test we set a very huge amount of small requests (bodies of > 95 and 113 bytes), until we get out of the 65535 (or 65536) bytes of window > space I get from httpd at the connection level. > (Each stream doesnt get near its limit. I can try if I can receive window > updates there but currently I cant reproduce ever receiving a window > update) > > > Originally this caused a segfault in my code, but I fixed that one. But now > Im just stuck waiting to receive a window update from httpd > > > My last testing was against 2.4.x (to get the 2.4.18 goodness)
And I think the combination of: === h2_session.c around line 707 === /* We need to handle window updates ourself, otherwise we * get flooded by nghttp2. */ nghttp2_option_set_no_auto_window_update(options, 1); ==================== And not a single call to nghttp2_submit_window_update() to find, explains the situation. I haven't tried what happens when I disable this auto_window call... but sending window updates is really required by the H2 specs. And I totally understand that this wasn't high priority... I worked around not sending updates in my implementation until yesterday :-) Bert