https://issues.apache.org/bugzilla/show_bug.cgi?id=44543
Summary: mod_proxy makes wrong decision on choosing worker,
ignoring request scheme
Product: Apache httpd-2
Version: 2.2.8
Platform: PC
OS/Version: Linux
Status: NEW
Severity: critical
Priority: P2
Component: mod_proxy
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
Step0: cleanup browser A (e.g. alt-shift-del in firefox)
Step1: browser A send http://B/ request through apache proxy to HTTP server B
Step2: browser A send ftp://B/ request through apache proxy to FTP server B
result:
Proxy Error
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET ftp://192.168.3.129/.
Reason: Error reading from remote server
B=192.168.3.129, A=127.0.0.1, apache proxy running at localhost
errorlog:
[Wed Mar 05 15:35:43 2008] [debug] mod_proxy_http.c(1607): proxy: start body
send
[Wed Mar 05 15:35:43 2008] [debug] mod_proxy_http.c(1696): proxy: end body send
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1873): proxy: HTTP: has
released connection for (*)
[Wed Mar 05 15:35:43 2008] [error] Optional hook test said: GET
http://192.168.3.129/favicon.ico HTTP/1.1
[Wed Mar 05 15:35:43 2008] [error] Optional function test said: GET
http://192.168.3.129/favicon.ico HTTP/1.1
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1670): proxy: grabbed
scoreboard slot 0 in child 22992 for worker proxy:forward
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1689): proxy: worker
proxy:forward already initialized
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1778): proxy: initialized
single connection worker 0 in child 22992 for (*)
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1670): proxy: grabbed
scoreboard slot 1 in child 22992 for worker proxy:reverse
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1689): proxy: worker
proxy:reverse already initialized
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1778): proxy: initialized
single connection worker 1 in child 22992 for (*)
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1670): proxy: grabbed
scoreboard slot 0 in child 22993 for worker proxy:forward
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1689): proxy: worker
proxy:forward already initialized
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1778): proxy: initialized
single connection worker 0 in child 22993 for (*)
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1670): proxy: grabbed
scoreboard slot 1 in child 22993 for worker proxy:reverse
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1689): proxy: worker
proxy:reverse already initialized
[Wed Mar 05 15:35:43 2008] [debug] proxy_util.c(1778): proxy: initialized
single connection worker 1 in child 22993 for (*)
[Wed Mar 05 15:35:45 2008] [debug] mod_proxy_ftp.c(149): proxy: FTP:
canonicalising URL //192.168.3.129/
[Wed Mar 05 15:35:45 2008] [debug] proxy_util.c(1424): [client 127.0.0.1]
proxy: *: found forward proxy worker for ftp://192.168.3.129/
[Wed Mar 05 15:35:45 2008] [debug] mod_proxy.c(849): Running scheme ftp handler
(attempt 0)
[Wed Mar 05 15:35:45 2008] [debug] mod_proxy_http.c(1812): proxy: HTTP:
declining URL ftp://192.168.3.129/
[Wed Mar 05 15:35:45 2008] [debug] mod_proxy_connect.c(100): proxy: CONNECT:
declining URL ftp://192.168.3.129/
[Wed Mar 05 15:35:45 2008] [debug] mod_proxy_ftp.c(811): proxy: FTP: serving
URL ftp://192.168.3.129/
[Wed Mar 05 15:35:45 2008] [debug] mod_proxy_ftp.c(903): proxy: FTP: connecting
ftp://192.168.3.129/ to 192.168.3.129:21
[Wed Mar 05 15:35:45 2008] [debug] proxy_util.c(1855): proxy: FTP: has acquired
connection for (*)
[Wed Mar 05 15:35:45 2008] [debug] proxy_util.c(2269): proxy: FTP: connection
complete to 192.168.3.129:21 (192.168.3.129)
[Wed Mar 05 15:35:45 2008] [debug] mod_proxy_ftp.c(993): proxy: FTP: control
connection complete
[Wed Mar 05 15:35:57 2008] [debug] mod_proxy_ftp.c(634): proxy:<FTP: 4294967295
<unable to read result>
[Wed Mar 05 15:35:57 2008] [debug] proxy_util.c(1873): proxy: FTP: has released
connection for (*)
[Wed Mar 05 15:35:57 2008] [error] [client 127.0.0.1] proxy: Error reading from
remote server returned by ftp://192.168.3.129/
[Wed Mar 05 15:35:57 2008] [error] Optional hook test said: GET
ftp://192.168.3.129/ HTTP/1.1
[Wed Mar 05 15:35:57 2008] [error] Optional function test said: GET
ftp://192.168.3.129/ HTTP/1.1
After the following _hack_(cleaning up the worker's history), apache proxy
works fine again.
diff -du modules/proxy/mod_proxy_ftp.c~ modules/proxy/mod_proxy_ftp.c
--- modules/proxy/mod_proxy_ftp.c~ 2008-01-02 11:25:08.000000000 -0800
+++ modules/proxy/mod_proxy_ftp.c 2008-03-05 15:39:27.000000000 -0800
@@ -902,6 +902,10 @@
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
"proxy: FTP: connecting %s to %s:%d", url, connectname, connectport);
+
+ worker->is_address_reusable = 0;
+ worker->cp->addr = NULL;
+ worker->cp->conn = NULL;
if (worker->is_address_reusable) {
if (!worker->cp->addr) {
--
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