iRule to avoide "Invalid action EV_SINK_HEADER during ST_HTTP_EARLY_100CONTINUE" error

In this case, the EV in the error message is short for "event", and does not refer to SSL certificates.

 

 

The most common way for this to happen is that you have a client issuing a POST to a virtual server with an iRule that attempts to call HTTP::retry from the HTTP_REPONSE event where the server is sending a response without receiving the entire client request.

 

 

In general, retrying POST methods is not a good idea, so if this is the case for you, then I would alter your iRule accordingly.