Hi,
while using utl_http package, we are able to make calls to a 3rd party webservice and all was going good till we hit transaction which resulted in big URL size - for ex one transaction had multiple rejections and url size is bigger than normal (around 1500 chars prior to encoding).

Protocol used is https and url gets encoded prior to the begin_request call.
When url size is smaller (around 700 chars prior to encoding) there is no issue seen.
When url size is big , processing of the request takes around 30 minutes and then results in
" ORA-29273: HTTP request failed
ORA-29263: HTTP protocol error"

Same URL (1500 chars) works fine while using Postman tool, no issues seen and gets executed in a second.

Is there a size limit for the URL while using utl_http.begin_request ?
or any other restrictions with using utl_http routine per issue described ?

Thanks,

req := UTL_HTTP.BEGIN_REQUEST (url=>the_url, method=>'POST');
UTL_HTTP.SET_HEADER (r      =>  req, 
                     name   =>  'Content-Type',   
                     value  =>  'application/x-www-form-urlencoded');
UTL_HTTP.SET_HEADER (r      =>   req, 
                     name   =>   'Content-Length', 
                     value  =>'  <length of data posted in bytes>');
UTL_HTTP.WRITE_TEXT (r      =>   req, 
                     data   =>   'p1 = value1&p2=value2...');
resp := UTL_HTTP.GET_RESPONSE 
                     (r     =>   req);