https://bz.apache.org/bugzilla/show_bug.cgi?id=61488
Bug ID: 61488
Summary: mod_proxy_http treats POST response timeout as a 100
reply timeout
Product: Apache httpd-2
Version: 2.4.27
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mod_proxy_http
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 35288
--> https://bz.apache.org/bugzilla/attachment.cgi?id=35288&action=edit
mod_proxy_http patch
For a POST request proxied through mod_proxy_http, it looks like a response
timeout is always handled by this block even after 100-continue has been
received:
ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(01102)
"error reading status line from remote "
"server %s:%d", backend->hostname, backend->port);
if (APR_STATUS_IS_TIMEUP(rc)) {
apr_table_setn(r->notes, "proxy_timedout", "1");
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01103)
"read timeout");
if (do_100_continue) {
return ap_proxyerror(r, HTTP_SERVICE_UNAVAILABLE, "Timeout
on 100-Continue");
}
}
For instance, logging shows a 100 response is received, but a "Timeout on
100-continue" is still indicated:
[Fri Sep 01 15:59:25.264579 2017] [proxy_http:trace2] [pid 13455:tid
140308050339584] mod_proxy_http.c(1536): [client 127.0.0.1:55835] HTTP:
received interim 100 response
[Fri Sep 01 15:59:25.264583 2017] [dumpio:trace7] [pid 13455:tid
140308050339584] mod_dumpio.c(140): [remote 127.0.0.1:8080] mod_dumpio:
dumpio_in [getline-blocking] 0 readbytes
[Fri Sep 01 15:59:26.265697 2017] [dumpio:trace7] [pid 13455:tid
140308050339584] mod_dumpio.c(151): [remote 127.0.0.1:8080] mod_dumpio:
dumpio_in - 70007
[Fri Sep 01 15:59:26.265753 2017] [proxy_http:error] [pid 13455:tid
140308050339584] (70007)The timeout specified has expired: [client
127.0.0.1:55835] AH01102: error reading status line from remote server
127.0.0.1:8080
[Fri Sep 01 15:59:26.265769 2017] [proxy_http:debug] [pid 13455:tid
140308050339584] mod_proxy_http.c(1264): [client 127.0.0.1:55835] AH01103: read
timeout
[Fri Sep 01 15:59:26.265785 2017] [proxy:error] [pid 13455:tid 140308050339584]
[client 127.0.0.1:55835] AH00898: Timeout on 100-Continue returned by /app/page
This can result in unwanted worker error states. Attached is a patch that
addressed this on my end.
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