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Hi All I am encountering a problem with my
Apache webproxy. We are using Apache 2.0.52 + OpenSSL with mod_proxy as a
reverse proxy. Use ProxyPassReverse and ProxyPass. When we load the
server with 5+ simultaneous users one specific page breaks about 30% of the
time. It causes the following Apache error
log messages: [Wed Nov 23 06:05:48 2005] [error]
[client <ip>] proxy: error reading status line from remote server
10.100.0.71, referer: https://www.myurl.org/uatwijsp/scripts/documentXML.jsp?ctxLayout_last=browseCXML.jsp&cmdLayout=&cmdLayout_P1=&cmdLayout_P2=&cmdBlock=all&cmd=askView&cmdP1=Status+%28Initial%29*66*0*wid*&cmdP2= [Wed Nov 23 06:05:48 2005] [error]
[client <ip>] proxy: Error reading from remote server returned by
/uatwijsp/viewers/cdz/viewCDZDocument.jsp, referer: https://www.myurl.org/uatwijsp/scripts/documentXML.jsp?ctxLayout_last=browseCXML.jsp&cmdLayout=&cmdLayout_P1=&cmdLayout_P2=&cmdBlock=all&cmd=askView&cmdP1=Status+%28Initial%29*66*0*wid*&cmdP2= We used Ethereal (protocol analyser)
to track the problem, and it appears that the backend server (10.100.0.71) does
respond to the request for the page (viewCDZDocument.jsp). The backend
sends the first few packets of that page but then doesn't get an
acknowledgement so retries a number of times and then gives up. Reverse Proxy
(Apache)
Backend (App Server) GET viewCDZDocument.jsp
------------------------------------------------> <--------------------------------------------------------------------------------ACK <--------------------------------------------------------------------------------HTTP
OK <--------------------------------------------------------------------------------part
of viewCDZDocument.jsp <--------------------------------------------------------------------------------part
of viewCDZDocument.jsp <--------------------------------------------------------------------------------part
of viewCDZDocument.jsp (At this point the Backend receives
no ACK from the Proxy so retries…) Any ideas or thoughts as to how to
tackle this would be gratefully received, as this problem has us stumped; we
have done a fair amount of googling, etc. and not come up with much of use. Thanks in advance and regards James This email and any files transmitted with it are confidential. If you are not the intended recipient, any reading, printing, storage, disclosure, copying or any other action taken in respect of this email is prohibited and may be unlawful.
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