https://bz.apache.org/bugzilla/show_bug.cgi?id=65631
Bug ID: 65631
Summary: Proxy CONNECT error 500
Product: Apache httpd-2
Version: 2.4.51
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mod_proxy_connect
Assignee: bugs@httpd.apache.org
Reporter: pa...@verotel.cz
Target Milestone: ---
Created attachment 38066
--> https://bz.apache.org/bugzilla/attachment.cgi?id=38066&action=edit
Patch for this bug
Hi,
I was getting lots of code 500 for CONNECT method in my proxy access log and
very long lasting requests in server-status lately.
I tried to dig a little bit so you can check end of debug/trace output of one
such request (ip addresses and server name were obfuscated, sorry):
...
proxy_util.c(4909): [client AB.XYZ.48.134:9045] proxy: CONNECT: #0: origin:
1/31
proxy_util.c(4810): [client AB.XYZ.48.134:9045] proxy: CONNECT: origin input
ready
proxy_util.c(4644): [client AB.XYZ.48.134:9045]
ap_proxy_transfer_between_connections complete (from AB.XYZ.49.14:443)
proxy_util.c(4878): [client AB.XYZ.48.134:9045] proxy: CONNECT: polling
(client=31, origin=31)
proxy_util.c(4902): [client AB.XYZ.48.134:9045] AH10215: proxy: CONNECT: woken
up, 1 result(s)
proxy_util.c(4909): [client AB.XYZ.48.134:9045] proxy: CONNECT: #0: origin:
1/31
proxy_util.c(4810): [client AB.XYZ.48.134:9045] proxy: CONNECT: origin input
ready
proxy_util.c(4644): (70014)End of file found: [client AB.XYZ.48.134:9045]
ap_proxy_transfer_between_connections complete (from AB.XYZ.49.14:443)
proxy_util.c(4838): [client AB.XYZ.48.134:9045] proxy: CONNECT: origin read
shutdown
proxy_util.c(4878): [client AB.XYZ.48.134:9045] proxy: CONNECT: polling
(client=35, origin=0)
proxy_util.c(4902): [client AB.XYZ.48.134:9045] AH10215: proxy: CONNECT: woken
up, 1 result(s)
proxy_util.c(4909): [client AB.XYZ.48.134:9045] proxy: CONNECT: #0: client:
4/35
proxy_util.c(4943): [client AB.XYZ.48.134:9045] proxy: CONNECT: client output
ready
proxy_util.c(4966): [client AB.XYZ.48.134:9045] proxy: CONNECT: client write
shutdown
proxy_util.c(4878): [client AB.XYZ.48.134:9045] proxy: CONNECT: polling
(client=31, origin=0)
proxy_util.c(4902): [client AB.XYZ.48.134:9045] AH10215: proxy: CONNECT: woken
up, 1 result(s)
proxy_util.c(4909): [client AB.XYZ.48.134:9045] proxy: CONNECT: #0: client:
31/31
proxy_util.c(4810): [client AB.XYZ.48.134:9045] proxy: CONNECT: client input
ready
proxy_util.c(4544): (104)Connection reset by peer: [client AB.XYZ.48.134:9045]
AH03308: ap_proxy_transfer_between_connections: error on client -
ap_get_brigade
proxy_util.c(4644): (104)Connection reset by peer: [client AB.XYZ.48.134:9045]
ap_proxy_transfer_between_connections complete (to AB.XYZ.49.14:443)
The point is that the proxy got 'End of file found' but tried to continue.
I'm not sure if it's not obsolete, but RFC2817 says:
5.3 Establishing a Tunnel with CONNECT
...
If at any point either one of the peers gets disconnected, any
outstanding data that came from that peer will be passed to the other
one, and after that also the other connection will be terminated by
the proxy. If there is outstanding data to that peer undelivered,
that data will be discarded.
Therefore I tried to apply simple and ugly hack and the strangest thing has
happend. It seems to change those pesky 500 to 200 and I don't see any hanging
connections anymore.
Can somebody check attached patch and write me what he or she thinks of it
please?
Thanks,
Pavel Mateja
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