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From "Devi Krishna" <devkrish.webeng...@gmail.com>
Subject Regarding graceful restart
Date Mon, 05 Feb 2007 20:44:26 GMT
Hi Apache Gurus,

 I am seeing the following issue when I sent a graceful restart signal to
httpd [run with proxy enabled]

 Processes on receiving SIGUSR1 seems to send a GET / HTTP/1.0 to the httpd
itself.
 This seems to be a dummy request that each process is trying to send

127.0.0.1 [05/Feb/2007:13:35:25 +0000] "GET / HTTP/1.0" 400 284
127.0.0.1 [05/Feb/2007:13:35:25 +0000] "GET / HTTP/1.0" 400 284
127.0.0.1 [05/Feb/2007:13:35:25 +0000] "GET / HTTP/1.0" 400 284
127.0.0.1 [05/Feb/2007:13:35:25 +0000] "GET / HTTP/1.0" 400 284
127.0.0.1 [05/Feb/2007:13:35:25 +0000] "GET / HTTP/1.0" 400 284


Wondering if this is a known issue, and if there is any solution for it.

I saw recent bug report regarding strange behaviour of mod_ssl on graceful
restart, but in my case, I dont have mod_ssl enabled.

Initially I saw this issue even when processes are in LISTEN state and
sigusr1 is sent.
I put in the following fix and that worked.

File : httpd/server/mpm/prefork/prefork.c
Function :child_main

    +   if (ap_mpm_pod_check(pod) == APR_SUCCESS) { /* selected as idle? */
    +      ap_log_error(APLOG_MARK, APLOG_ERR, status, ap_server_conf,
    +          "Dont process connection as graceful restart received from
pod");
    +     break;
    +  }
    +   if (die_now)  {
    +       ap_log_error(APLOG_MARK, APLOG_ERR, status, ap_server_conf,
    +            "Dont process connection as graceful restart received");
    +       break;
     + }

       current_conn = ap_run_create_connection(ptrans, ap_server_conf, csd,
my_child_num, sbh, bucket_alloc);
       if (current_conn) {
           ap_process_connection(current_conn, csd);
           ap_lingering_close(current_conn);
       }


However, for connections in ESTABLISHED state and other TCP states,  I still
see this issue.

Your inputs would be of great help!

Thanks & Regards
Devi

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