Mule http request giving 404 mapped as failure - mule

Question

I am trying to pass the multiple URI params in the http request as follows:
<http:listener-config name="HTTP_Listener_Configuration"
host="localhost" port="8081" doc:name="HTTP Listener Configuration"
connectionIdleTimeout="40000" />
<http:request-config name="HTTP_Request_Configuration1" protocol="HTTPS" host="" port="443" doc:name="HTTP Request Configuration" connectionIdleTimeout="300000" responseTimeout="50000">
<http:basic-authentication username="user" password="123"/>
</http:request-config>
<flow name="testFlow">
<http:listener config-ref="HTTP_Listener_Configuration"
path="/paypal" allowedMethods="GET" doc:name="HTTP" />
<set-variable variableName="config" value="#[{'p1':'3054', 'p2':'child/Lines'}]" doc:name="Variable"/>
<http:request config-ref="HTTP_Request_Configuration1" path="/resources/shipment/{p1}/{p2}" method="GET" doc:name="HTTP">
<http:request-builder>
<http:uri-params expression="#[flowVars.config]"/>
</http:request-builder>
</http:request>
</flow>
But this is giving me error as below:
Response code 404 mapped as failure.
ERROR 2019-01-04 18:46:34,526
[[paypaltest].HTTP_Listener_Configuration.worker.01]
org.mule.exception.DefaultMessagingExceptionStrategy:
********************************************************************************
Message : Response code 404 mapped as failure.
Payload : org.glassfish.grizzly.utils.BufferInputStream#b473ec2
Element : /testFlow/processors/1 # test:test.xml:29 (HTTP)
Element XML : <http:request config-ref="HTTP_Request_Configuration1" path="/resources/shipments/{p1}/{p2}" method="GET" doc:name="HTTP">
<http:request-builder>
<http:uri-params expression="#[flowVars.config]"></http:uri-params>
</http:request-builder>
</http:request>
--------------------------------------------------------------------------------
Root Exception stack trace:
org.mule.module.http.internal.request.ResponseValidatorException: Response code 404 mapped as failure.
Please let me know if any help can be provide!

Answer 1

It means that the url doesn't exist. Try to hit the url directly in postman before implementing in Mule. Since you wiped out the host="", I'll pretend it's example.com. My guess is that it's having an issue with p2. If you'd like to send the actual string, you'll need to URL encode the "/", which is %2F
So to test hit https://www.example.com/resources/shipments/3054/child%2FLines, with the Basic Auth for Authorization.
Postman: https://www.getpostman.com/apps

Answer 2

The issue i faced was unique to me, i tried this REST api call from SOAPUI and there it gave me the same error i.e. 404 not found so i compared it with POSTMAN request and found that Authorization header was the missing piece for this.
After adding this to http header it worked perfectly.

Answer 3

Please refer
https://docs.mulesoft.com/connectors/http/http-authentication
here are two solutions :
1. Add preemptive="true" in basic authentication configuration
The pre-emptive option passes the user name and password without waiting for a prompt from the server.
Add Authorization in the http:header value ="Basic dXNlcjoxMjM="