|Summary:||proxy error: Error reading from remote server|
|Product:||Apache httpd-2||Reporter:||J Srinivasa Rao <jsrao_5>|
|Component:||mod_proxy||Assignee:||Apache HTTPD Bugs Mailing List <bugs>|
Description J Srinivasa Rao 2006-05-23 17:58:03 UTC
I configured the Apache httpd-2.0.55 as Reverse proxy server for a JBOSS backend application server. It seems everything working fine. But some times ( intermittently) i am seeing an following error. Proxy Error: The proxy server received an invalid response from an upstream server. The proxy server could not handle the request POST /jsp/file/file_upload1.jsp. Reason: Error reading from remote server The folllwing are the errors found in the error_logs [Tue May 23 05:30:24 2006] [error] [client 10.10.7.69] proxy: error reading status line from remote server myserver, referer: http:/ /myserver.mydomain.com/jsp/authapp/group_app_add1.jsp [Tue May 23 05:30:24 2006] [error] [client 10.10.7.69] proxy: Error reading from remote server returned by /jsp/authapp/group_app_ad d1.jsp, referer: http://proxy.mydomain.com/jsp/authapp/group_app_add1.jsp
Comment 1 Ruediger Pluem 2006-05-23 18:28:51 UTC
Are you using SSL on httpd side? If you yes, you have been hit by PR37145.
Comment 2 J Srinivasa Rao 2006-05-23 18:35:32 UTC
(In reply to comment #1) > Are you using SSL on httpd side? If you yes, you have been hit by PR37145. Yes I am using ssl on httpd side. But i am seeing this error on both http( Non SSL ) and https:// ( SSL ) requests intermittently
Comment 3 J Srinivasa Rao 2006-05-23 18:44:58 UTC
The patch PR37145 has been applied earlier before moving Reverse proxy server to production.
Comment 4 Ruediger Pluem 2006-05-23 19:17:17 UTC
Either there is a problem with your backend system or you are probably facing some sort of keepalive problem (backend closed connection just as httpd sent request). I know that this may not be possible in a production environment, but are you able to catch such a situation with a network sniffer? Another approach would be to disable keepalives to the backend to find out if this makes the problem go away. So please try the following setting: SetEnv proxy-nokeepalive 1
Comment 5 Marco Berizzi 2006-06-14 10:38:22 UTC
I'm having a similar problem with apache 2.2.2 and IIS from windows 2003sp1/2000sp4/nt40sp6a (no ssl & only ipv4). 'SetEnv proxy-nokeepalive 1' resolves the problem. The problem is related to a RST packet sent from the backend server to the apache reverse proxy. See http://issues.apache.org/bugzilla/show_bug.cgi?id=39499#c7 apache is running on linux 18.104.22.168 and/or 2.6.17-rc6
Comment 6 J Srinivasa Rao 2006-06-14 12:33:18 UTC
Hi Guys First of all, thanks alot for all your sugestions. I tried with this "SetEnv proxy-nokeepalive 1" setting last week. and my QA team monitored the system for a week. seems to be everything is good and the problem is fixed. Thanks once gain ..