My Oracle Support Banner

Unable To Establish Connection To Web Cache From F5 Big IP Loadbalancer (Doc ID 422091.1)

Last updated on MARCH 01, 2024

Applies to:

Web Cache - Version 9.0.4 to [Release AS10g to AS10gR2]
Information in this document applies to any platform.
This problem can occur on any platform.


Third-party hardware loadbalancer - F5 Big IP is unable to reach Oracle WebCache.

Oracle WebCache may become intermittently unreachable from browser, which can be confirmed by accessing the below URL from a browser:


The Big IP console shows Oracle WebCache as down and the following errors are seen in Oracle WebCache event_log:

[error 12417] [ecid: <ECID>] HTTP request-header parsing error - no header name. Client IP: <f5_IP_Address>
[error 12419] [ecid: <ECID>] Dump of offending HTTP request-header line: GET /


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

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