Hi, I'm using a Web Service on Tomcat 6.0.29, with Hessian as protocol (hessian.caucho.com) via Apache as reverse proxy. One request with a probably large response failed with HTTP 413. I don't find this error code in the access log though, and the only error in Apache error log about that time is following: [Fri Nov 26 10:14:27 2010] [error] (-3)Unknown error 18446744073709551613: proxy: prefetch request body failed to xxx.xxx.xxx.xxx:8080 (host.name) from yyy.yyy.yyy.yyy () Can anyone explain what that error means, and if the correspondig HTTP request would have failed because of this? I'm not at all sure it has anything to do with above web service problem. A lot of other requests from the same client to the same backend application, even in the same session, have succeeded. Apache is running on Debian 5, installed as a package, version 2.2.9-10+lenny6 (which means it is 2.2.9 with some bugfixes from newer versions backported). MPM is worker, proxy backend is a single HTTP server handled by mod_proxy_http directly (no mod_proxy_balancer) Configuration of this system is too large and complicated to post fully, and the proxying is done by a rewrite rule with [P] flag. Please tell me what information from config might be relevant for you. Thanks Rainer --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx