My Oracle Support Banner

Web Cache Fails With Message "503 No Response from Application Server", And Error "Timeout during network receive, socket number Net_Recv_x" in event_log (Doc ID 889013.1)

Last updated on AUGUST 31, 2020

Applies to:

Web Cache - Version 10.1.2.0.2 and later
Information in this document applies to any platform.
***Checked for relevance on 27-Dec-2013***
***Checked for relevance on 02-Jul-2018***

Symptoms

Web pages occasionally end up with a "503 No Response from Application Server" error displayed in the browser and the Web Cache event_log contains the following error:

- <ORACLE_HOME>/webcache/logs/event_log
--------------------------------------------------
[10/Sep/2009:11:20:29 +0100] [trace 11331] [ecid: <ECID>] Request matches configured
site <HOSTNAME.DOMAIN>:<PORT>.
[10/Sep/2009:11:20:29 +0100] [trace 11953] [ecid: <ECID>] In ESI template
<HOSTNAME.DOMAIN>/portal/page/portal/BI_PORTAL/BI_PORTAL_CUSTOM_TEMPLATE?_mode=25&_bac
k_url=http://<HOSTNAME.DOMAIN>/portal/page/portal/BI_PORTAL/AnlyticsTa
sks?_mode=16, the fragment's site name and URL has been discovered as <HOSTNAME.DOMAIN> and
http://<HOSTNAME.DOMAIN>/portal/page/portal/BI_PORTAL/BI_PORTAL_CUSTOM_TEMPLATE?_esiReqType=3
[10/Sep/2009:11:20:29 +0100] [trace 11304] [ecid: <ECID>] Cache miss request.
[10/Sep/2009:11:20:29 +0100] [debug 11310] [ecid: <ECID>] URL is not in the cache miss table.
[10/Sep/2009:11:20:29 +0100] [trace 11224] [ecid: <ECID>] Site <HOSTNAME.DOMAIN>:80 matches site-to-server mapping <HOSTNAME.DOMAIN>:80.
[10/Sep/2009:11:20:29 +0100] [trace 11227] [ecid: <ECID>] Request is routed to origin server <HOSTNAME.DOMAIN>:<PORT> using load balancing.
[10/Sep/2009:11:20:29 +0100] [req-info] [ecid: <ECID>] [client: <IPAddress>][host:-] [url: -]
[10/Sep/2009:11:20:29 +0100] [trace 13351] [ecid: <ECID>] Timeout during network receive, socket number Net_Recv_x
[10/Sep/2009:11:20:29 +0100] [req-info] [ecid: <ECID>] [client: <IPAddress>] [host: -] [url: -]
[10/Sep/2009:11:20:29 +0100] [trace 13351] [ecid: <ECID>] Timeout during network receive, socket number Net_Recv_x
[10/Sep/2009:11:20:29 +0100] [trace 11398] [ecid: <ECID>] A client connection to listening port 80 is dropped at the end of keep-alive session.
[10/Sep/2009:11:20:29 +0100] [debug 11353] [ecid: <ECID>] Network error during client receive. The error code is: IO Timeout.
[10/Sep/2009:11:20:29 +0100] [trace 11398] [ecid: <ECID>] A client connection to listening port 80 is dropped at the end of keep-alive session.
[10/Sep/2009:11:20:29 +0100] [debug 11353] [ecid: <ECID>] Network error during client receive. The error code is: IO Timeout.
[10/Sep/2009:11:20:29 +0100] [debug 1] [ecid: -] NET_DEBUG: gracefulDisconnect: Closing socket 904
...
[10/Sep/2009:11:20:29 +0100] [debug 11320] [ecid: -] Connection count decremented. Current connection count is 2.
[10/Sep/2009:11:20:29 +0100] [debug 1] [ecid: -] NET_DEBUG: gracefulDisconnect: Closing socket 1308 ...
[10/Sep/2009:11:20:29 +0100] [debug 11320] [ecid: -] Connection count decremented. Current connection count is 1.
[10/Sep/2009:11:20:29 +0100] [trace 11403] [ecid: <ECID>] begin cacheability decision for following url: <HOSTNAME.DOMAIN>:80/portal/page/portal/BI_PORTAL/BI_PORTAL_CUSTOM_TEMPLATE?_esiReqType=3
[10/Sep/2009:11:20:29 +0100] [trace 11408] [ecid: <ECID>, 1] URL does not match any caching rule.
[10/Sep/2009:11:20:29 +0100] [trace 11413] [ecid: <ECID>, 1] The HTTP request method is not GET, or the URL contains query string parameters. The request is not cacheable.


While on the same timestamp no errors can be seen/recognized in Http Server access_log

To have more information about these symptoms, you can simply switch the web cache logging to debug level using the following note instructions:
<Note 1076037.1>  <How to Increase event_log Verbosity to DEBUG in Oracle WebCache 10g?>

Cause

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Symptoms
Cause
Solution
References

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.